Encaps but no decaps. Since some configurations of upstream negotiate the .

Encaps but no decaps 10) can't connect to destination X. 0 However,When I checked the "Show cyrpto ipsec sa" ,I Could see that decaps packet counters are getting incremented but the encaps packets are always showed as 0. Although I configured the static route on the virtual router pointing to the right tunnel interface, but it seems as the PA does not send the VPN traffic to the destination. If I scroll down there's a second identical tunnel, with decaps, but no encaps. € Troubleshooting Tools From the local firewall it shows pkts encaps but no decaps. All reactions. Issue: #pkts encaps: 5413, #pkts encrypt: 0, #pkts digest: 0 #pkts decaps: 0, #pkts decrypt: 0, #pkts verify: 0 I Th symptom you describe (encaps without decaps) is most often the distant end not sending the traffic back into the tunnel (internal routing or potentially lack of NAT exemption at their end). #pkts encaps: 0, #pkts encrypt: 0, #pkts digest: 0 #pkts decaps: 141, #pkts decrypt: 141, #pkts verify: 141 So it is getting packets but not encap the packets back. 0 255. If you go and look on the other side you will see encaps but no decaps. 50. 9) It was observed always phase 1 part of tunnel established successfully Hi Guy's. Check whether you have routes to reach the remote subnet/IP over the internet. Also, We have 9 encaps and 9 decaps on the concentrator side!! That means the concentrator is encapsulating the packets and sending it back to router A but the packet is not reaching the router A. The configuration of Site B is as follows: I don't think there is anything unusual about the packet count being different for decaps/encaps . No decaps or decrypts. Im sure it is somethin on the router end but cant figure it out. However,When I checked the "Show cyrpto ipsec sa" ,I Could see that decaps packet counters are getting incremented but the encaps packets are always showed However, there was no traffic passing through between the local and the remote encryptions domains. #pkts encaps: 25, #pkts encrypt: 25, #pkts digest: 25 #pkts decaps: 28, #pkts decrypt: 28, #pkts verify: 28 . If primary IPsec tunnel goes down, static routes are not withdrawn from routing table and traffic effectively gets blackholed. When i run show crypto ipsec sa i see that packets on ASA is deencapsulated, but not encapsulated when going back. ASA1 has a noNAT rule(NAT exemption) ASA2 packet tracer shows ACL drop - this is were the NAT (10. Cause. One of the streams of interest （10. However my problem with failover still persists. There is no return traffic from this site. 255 any no access-list 108 permit ip 10. I am familiar with not receiving packages from the other side, when the number of decaps is 0 too, but here we receive packages, but decryption seems to fail, which is strange because the tunnel is online so Hello guys, I'm trying to establish a route-based VPN with a partner but I'm not able to reach the routes on the partner side. On ASA-1: encaps: 4 means that traffic is being encrypted and sent outbound towards ASA-2, however, this ASA does not Example key encapsulation and decapsulation using liboqs . So its almost like traffic goes to the remote firewall and then gets looped or something. It looks like the eth1/1 on the PA is ip 100. Cyber Elite Options. /24) that would go through the VPN. 214. If an ASA or router is getting encaps but not decaps, this means it is encrypting the data and sending it but has not received anything to decrypt in return. I setup VPN between 1811W and 3550A. I see no packet encaps, but do get decaps. Anyone know what might cause this? vpn# sh version Cisco Adaptive Security Appliance Software Version 9. However, we are not able to get any traffic moving. 2 host in your internal network pointing the traffic back to the ASA. ip route 192. If this is zero, you have an issue on the local firewall side of the VPN. This is a very strange result for me. 0 to 192. Check routing on remote end. I have managed to get the VPN tunnel to establish, however, I seem to be unable to get any traffic to flow between the sites. One end point is an ISR 2921 and the other end is a ASR 1001x. There is a site-to-site VPN that works and a remote client VPN that does not. Yesterday around 11:00am this suddenly stopped work. Tunnel is up, but traffic is not being tunneled (i can not ping host from either site): Crypto map tag: WAN_map, seq num: 2, local addr: 80. Now for an unknown reason this spoke is connected to both hubs, but only passes traffic to the primary hub. The O0 segfaults make debugging fun! The KAT output between upstream and PQClean is identical. 2(4)22 vpn# sh capt capture Hello Tarik, Thanks for your help, however no chance this didnt do the trick. Here is a show crypto Running "show vpn flow tunnel-id x | match endap" I can see some encaps, but the decaps are 0. Hi Everyone, Any idea what could be causing this? #pkts encaps: 1181, #pkts encrypt: 1181, #pkts digest: 1181 #pkts decaps: 1181, #pkts decrypt: 0, #pkts verify: 0 we usually encounter encaps/encrypts are incrementing, but no decaps/encrypt -- usually is nat issue, but this one is different. I started to point fingers at routing on their end. The tunnel has completed both Phase 1 and Phase 2 successfully. Recently we observed a strange issue while building a site to site VPN tunnel between a Cisco ASA [9. 2 mtu/path/mss adjustments will Traffic is flowing from local site, but no reply is ever received. Server cannot initiate the session. Rob Ingram. 123 site. Looks like the VPN session is up, but we are not getting any encaps on our end. Go to solution. X. Verified that the Mikrotik does have the BGP return routes installed, just looks like they point at the wrong interface. Thanks again. As mentioned, it was eventually due to a routing issue on a downstream device. Let me get that working and see if that's the issue. Hello, I looked at the configuration of your Hi, I've created a site to site VPN from Cisco ASA (ios version 9. (version 9. I know I've missed something. View solution in original post. ASA1 packet tracer shows VPN allowed - packets are send and I see encaps but no decaps - i think this side is configured corectly. If I ping from the LAN of the 1921, the 1921 shows encaps, but no decaps . i think this means that you are decrypting incoming traffic from the vpn tunnel,(ie remote end is sending Thanks Silvio. When see only encaps/decaps packets at one end, it is likely an issue with routing, thus return traffic cannot hit Firewalls/Routers for being encrypted. I have tried checking some crypto debugs and checking the logs but nothing stands out as an issue. 5K views; Admin. Enterprise Certifications Community; Like; Answer; Share; 4 answers; 2. Routing traffic from Mikrotik -> Palo shows no IPSec encaps on the Mikrotik, no decaps on the Palo firewall. Only time is usually when just configuring a new connection and testing it with ICMP which would result in identical count in So looking at routing table 192. Not even when I try to ping from site B to Site A. In encaps is visible that some packets were sent but in decaps no packets were received back or just some of them. Type escape sequence to If you compare both outputs look at the pkts encaps (in red) and the pkts decaps (in purple). I have this exact same config working on another pair of these on the same networks. It looks like their side is So if I ping from the LAN of the ASA, the ASA shows encaps, but no decaps. I believe I have it all set up correctly and the tunnel is show up and NAT appears to be working. Troubleshooting Tools RT encaps . 1 with no decap. As for if there's a NATing, I usually run a debug for phase 1 and phase 2 to make sure that the parameters are set correctly on the remote side, and for this tunnel I didn't see any NATing. I'm currently setting up a site to site vpn tunnel using a Cisco ASA 5505. Phase 2 is my issue. To view this info you would use the command “sh ipsec sa peer x. 1. 1 since 1. The tunnel will not decap any packet on either side. Georg Pauwen. I have an IPSEC VPN that is only passing traffic one way. The outputs show that on both spokes the IPSEC tunnel is up, but, Spoke2 shows encrypted packets (encaps) but no decrypted packets (decaps). - But another source(1. i've tried recreating the site to site multiple times. I am trying to ping one of the inside Interface on my ASA, wich has an ACL permit icmp any any (for test purposes), but i get 0 hits, although packets are decpasulated and decrypted by the tunnel. so, this drop-reason doesn't actually reflect your problem. 239. KEM performance ☰ Operations per second per algorithm Configuration information. Packets enter the ASA, then according to packet tracer they should match the VPN, but we don’t see encaps. I see from Azure PA to the starlink Seeing no return pkts decaps=0 so wonder if this has to do with Phase 1 picker lower security config due to ASA drop down approach (first match) Thanks . However, the ASA may be set to not bypass interface ACLs for VPN traffic. 0). 5 Helpful Reply. 100. The hubs are C8810-K Hello, We are facing weird issue, suddenly working VPN went down, while reviewing, we found that tunnel is up however traffic is not passing. 7. So I went back and checked the new tunnel and I can see phase 1 and 2 complete. #pkts compressed: 0, #pkts decompressed: 0 #pkts not compressed: 0, #pkts Instance KeyGen Encaps Decaps hqc-128 75 177 323 hqc-192 175 404 669 hqc-256 356 799 1427 ableT 1: Performance in kilocycles of the optimized implementation using AVX2 instructions for di erent instances of HQC. On one side, I can see encaps and decaps packets but on the other it only has decap packets. crypto isakmp policy 3382 encr aes 256 hash sha256 authentication pre-share OQS_API OQS_STATUS OQS_KEM_decaps(const OQS_KEM *kem, uint8_t *shared_secret, const uint8_t *ciphertext, const uint8_t *secret_key) Decapsulation algorithm. Pulling my hair out on this one. There are 2 streams of interest. 0 F0/0 I have just configured the IPSEC tunnel between my router and the Access point. In this case we can see that the tunnel is working as it should from the 234. 12. Hi Guys- I know there are a ton of threads on phase 2 issues, and i've been reading all of them, but am still having issues. Traffic from one side sees proper encaps and decaps whereas traffic from the other side does not see decaps. Hello everyone, We have IPSec site-to-site VPN between Cisco router and Cisco ASA. 1: Phase 1 IKE negotiation is up on both ASA’s and completing – Tunnel Establ Tunnel is active on both ends but no traffic is flowing through. 68. Go to solution When troubleshooting, multiple commands may be needed to gain different pieces of information on an IPSec tunnel. I would imagine that typically the data transfer is uneven so I don't expect ever to see these counters match. Site to Site VPN, IPSec, Cisco 881 to a Watchguard. here is the config I have used: 1811 Router: crypto isakmp policy 2. 234. 0/24 has no entry and it traffic goes towards 10. 1 <-- i guess the d Hi, I have setup a Site-to-Site VPN between an ASA and a cisco Router (UC520). The issue is the tunnel terminates on an interface in a zone Always we were seeing issues with encapsulation, the packets sent were never encapsulated, however the packets received from remote peers were de capsulated, this means the ASA Specifically if you have encaps on one side but no decaps, that means traffic from the other side is not arriving. Mark as New; Subscribe to RSS Feed The outputs€show that on both spokes the IPSEC tunnel is up, but, Spoke2 shows encrypted packets (encaps) but no decrypted packets (decaps). Verify the other end has Pulling my hair out on this one. I've also combed through and removed anything that was related to Encaps/s: Decaps/s: Algorithm family: Code type: Architecture: ChartJS options Enable legend. I'm really just trying to understand why the ASA was seeing the traffic but was still not incrementing decaps We have the tunnel established, but traffic doesn't appear to be hitting the tunnel only when leaving my side. y Type : L2L Role : responder Rekey : no State : I could use some help with this one, I am missing the cause of this problem. On edge router is only port forwarding to router behind with PAT enabled. Additionally, packet tracer also lo I have configured a tunnel and doing 'show crypto ikev2 sa' and 'show crypto ipsec sa', I can see that there is no issue. However, there are no encaps/encrypts going the other way. If this has a number, but the packets decapsulated is zero, it means the remote side has an issue. I did a packet capture on the tunnel interface, and see the three-way handshake, but when our host does a http GET, I see no reply. 123. Unfortunately when I try to initiate traffic through this tunnel, I see the encaps increase but no decaps on "show crypto ipsec sa". We're running PANOS 7. #pkts encaps: 0, #pkts encrypt: 0, #pkts digest: 0 #pkts decaps: 965, #pkts decrypt: 965, #pkts verify: 965 . When I ping plant 2 (Cisco 861) from main asa (Cisco 8. 7 REPLIES 7. Network details are as follows: Site A: Network ID: 10. On the ASA side both encaps and decaps are 0. The packet-tracer command you showed doesn't actually simulate VPN traffic; packet-tracer simulates packets as ingressing the ASA from the wire, which is in your case the encrypted packets (with tunnel endpoints source/destination IPs). 1. x. Since the tunnel is built we are Since I use no sysopt connection permit-vpn - I added a line to the inside interface ACL to allow the traffic and packet-tracer was happy. Since some configurations of upstream negotiate the Solved: Packets enter the ASA, then according to packet tracer they should match the VPN, but we don’t see encaps. 0/16）can be connected. x” *I made up the IP Addresses! From the perspective of Site B, I'm seeing decaps and decrypts when I try to ping from one tunnel interface to the other. 36. I have a continuous ping running on both sides but now it seems like only the decap packets are increasing. So you need to check the interesting traffic and make sure that whatever the other side is trying to get to at this location is The customer reports a VPN as down. c. 2(5) and a checkpoint FW? I dont have access to the checkpoint firewall nor do i know much about the appliance. #pkts encaps: 2210, #pkts encrypt: 2210, #pkts digest: 2210 #pkts decaps: 1678, #pkts decrypt: 1638, #pkts verify: 1638 Hello, We have a partner site we are attempting to setup a site to site VPN. I've went over and over the config and I'm not seeing anything that stands out. OSPF is running between 1811w and 3550A. both sides : crypto isakmp policy 10 encr aes 256 hash md5 authentication pre-share group 5 crypto isakmp key cisco address ipv6 ::/0 crypto isakmp keepalive 60 10 ! crypto ipsec security-association lifetime seconds 28800 ! Encaps Decaps • No parameter and implementation changes 12: HQC hqc-rmrs-128 0 1000 2000 3000 4000 5000 6000 7000 8000 k cycles KeyGen Encaps Decaps • Reference implementation from PQClean now working on the M4 13: NTRU Prime ntrulpr761 sntrup761 0 2000 4000 6000 8000 10000 k cycles KeyGen Encaps Decaps • Jan 2019: Optimized implementation by . 1( 5) ] and Palo Alto Next Generation firewall. I have this problem too. They require us to NAT our inside to a specific address for use in their network. Anyway. Since "outer" associated tunnel has no IP address, I'm unable to configure tunnel monitoring or path monitoring for From the output of sh cry ipsec sa, on ASA-2: decaps: 4 means that packets are coming inbound towards this ASA and it's being decrypted, however, there is no reply back from this ASA since there is no packet being encrypted. Phase 1 and Phase 2 seems fine as per the following but I could not ping internal interface of the router or ASA or any device either endpoint of the I have a 5512 in a datacenter and a 5505 at an office. 10) can connect to destination X. asa version is ASA 9. The channel is UP, phase 1 (IKEV1) and phase 2 (Ipsec) are OK, I can see the connection with Cisco ASDM in the Monitoring section but unfortunately, doing an IP packet tracer I get DROP in the VPN phase, although the tunnel is activated correctly. 0 / 24 Firewall IP: 10. All forum topics; Previous Topic; Next Topic; 1 Reply 1. 13. A And the number of packet drops is very close to the difference of the encaps/decaps or encrypt/decrypt. I've rebu The decaps and encaps are the traffic hits over the VPN tunnel, if for whatever reason we don't see encaps it means that we are not sending the interested traffic over the tunnel. 113 but the PA in Azure sees the peer IP of 206. I can see encaps but no decaps. The tunnel is up and operational but i'm unable to ping any devices on with end. 10 vpn-tunnel-protocol ikev1 split-tunnel-policy tunnelspecified Same thing on the router, #pkts encaps: 0, #pkts encrypt: 0, #pkts digest: 0 - #pkts decaps: 453, #pkts decrypt: 453, #pkts verify: 453. On the Cisco end, the tunnel If the other end counters for decaps is increasing but no encaps, then this would usually indicate a NAT issue on the remote end or a routing issue. 101 description sub-port to data vlan 101 encapsulation dot1Q 101 vrf forwarding 11011-Inside ip address 10. I've got a feeling the issue is related to NAT, but I'm not sure what I'm doing wrong. Thanks again! Beta Was this translation helpful? Give feedback. 1 255. How are you testing communication? Provide the As the packet encaps are happening at your side and no decaps on the remote side, these are the below things to consider. We've looked over the configs, but we can't find where the issue is. 254 / 32 Solved: Packets enter the ASA, then according to packet tracer they should match the VPN, but we don’t see encaps. Solved! Go to Solution. Already have an account? Sign in to comment. #pkts encaps: 16, #pkts encrypt: 16, #pkts digest: 16 I saw the no decaps and I assumed the VPN is not configured correctly from the remote side. 2224 vlan When see only encaps/decaps packets at one end, it is likely an issue with routing, thus return traffic cannot hit Firewalls/Routers for being encrypted. VIP In response to nidonido2013. Otherwise I don't see any issue on the VPN tunnel side, it is up, just no traffic coming back. if you care to see that, but we care more about 2. Sign up for free to join this conversation on GitHub. make sure you have allowed the ESP traffic back in within you ACL statements. Routing traffic from Palo -> Mikrotik shows IPSec encaps on the Palo, decaps on the Mikrotik, but no return traffic. Chinese OQS_STATUS(* encaps)(uint8_t *ciphertext, uint8_t *shared_secret, const uint8_t *public_key) Encapsulation algorithm. So I have no idea what to look at next. I really should look to understand more about DSL and ppoe I have been relying on MPLS providers for too long. 0 0. bin that connects to another company site to site vpn tunnel it is working fine no issue, until the other company is changing the connection from there current firewall to a new firewall with a new IOS and different public IP address. Double check NAT’s to make sure the traffic is not NAT’ing correctly. Mark as New; Bookmark; Subscribe; Mute; Subscribe to RSS Feed; Now I understand that shared_secret_e is output value from encaps() API and decaps() makes shared_secret_d to be same with shared_secret_e using the ciphertext. I believe the remote end is also using an ASA. We resolved this by reloading the ASA. Regards, Thiyagarajan. pkts encaps: 7, #pkts encrypt: 7, #pkts digest: 7 pkts decaps: 7, #pkts decrypt: 0, #pkts verify: 0. However, over starlink, big problem. Site A does have multiple Internet connections. Usually I'd punt it to the other side after clearing the tunnel but no ip policy route-map nonat no ip access-list extended nonat no route-map nonat permit 10 no access-list 107 permit ip 192. Additionally, packet tracer also lo If your encaps are increasing but not receiving traffic (decaps) then the issue probably exists on the other end (smoothwall). And Hello, We are facing weird issue, suddenly working VPN went down, while reviewing, we found that tunnel is up however traffic is not passing. AGCANFW02P/sec/act# ping 169. kindly suggest. #pkts decaps: 120, #pkts decrypt: 120, #pkts verify 120 !--- 120 packets received from client. Does anyone have I'm trying to figure out an issue with a 3rd party vpn connection. A copy of this file can be found in the liboqs repository under tests/example_kem. We use some Cisco VPN clients The outputs€show that on both spokes the IPSEC tunnel is up, but, Spoke2 shows encrypted packets (encaps) but no decrypted packets (decaps). Regarding the VTI part you Hi, I have the following setup , tunnel (remotesec )is up but host cannot access group-policy VPN_GPO internal group-policy VPN_GPO attributes dns-server value 192. So potentially the traffic on the DC The Phase 1 portion of our tunnel is obviously happy as well if we are even getting to the point of encaps and decaps, so on all accounts we have success!!! The nice thing about this is, really you can add networks via static route that can take this tunnel without any Crypto ACL’s defining the traffic, so it is much more scalable of a solution in my opinion with less #pkts encaps: 2, #pkts encrypt: 2, #pkts digest: 2 #pkts decaps: 0, #pkts decrypt: 0, #pkts verify: 0. And on the ASA side I could not see anything landing into the IPsec tunnel or even hitting the ASA outside Hey Satish, TO add to Samir's comment, if the encaps are incrementing but the decaps remain at 0 in the > show vpn flow tunnel-id <tunnel-id> command, then it might be an issue with the zones associated Traffic from one side sees proper encaps and decaps whereas traffic from the other side does not see decaps. I configured my side and could see the VPN is working, I can ping the interface tunnel but not the local routes on the other side. Hi Olivier, Just made some tests in lab and I have no success to do it :-(I use 881 and 1841 both in 15. View solution in original post . I've got a site to site that is connecting but looking at the session in monitoring its showing one way traffic. Regarding the VTI part you VPN can decap but no encaps Go to solution. 2 repeat 100. Always the same problems 0 Helpful Reply. The tunnel between main and branch site is up (according to sh cry session and sh crypto isakamp sa) but i can't send traff Hello everyone, I have an urgent problem with a site-to-site VPN configuration. Check your NAT/NO NAT list to ensure the local and remote encryption domains are in one of the two. 0)rule is If you have no encaps but some decaps that usually indicates a NAT or routing issue. but there is no traffic encrypted on the DC ASA so therefore nothing decrypted on Site1 ASA. You will know this if no sysopt connection permit-vpn is specified in the running configuration. 5 T no ip unreachables! interface Port-channel10 no ip address hold-queue 150 in! interface Port-channel10. Example: Tunnel terminating on an IP on Ethernet/2 in DMZ zone. 2 Updates for ebruaryF the 23rd 2024 We have updated our IND-CPA security proof and de nitions of hard problems in The original HQC-192 code (upstream from PQClean) passes the encaps/decaps test with -O3 and segfaults with -O0. A simple "clear ipsec sa peer" fixes the issue, but I'm trying to figure out the root cause. So the "encaps" counters are increasing? but no "decaps"? If encaps are increasing on your device that would imply you are sending traffic, does the other end confirm they are decrypting the traffic? Have you both confirm that traffic is not unintentially being natted? Normally you'd define a NAT exemption rule. That means traffic is being sent from PIX towards the ASA end, however, either the traffic does not reach the I have two ASAs running a site-to-site vpn. I was thinking it may eith so you see the packets going in through your inside interface but no reply coming back; please check if you have a route for 172. The decaps and decypted packets does not go up and also has a mismatch in count and we get "Recv errors" as follows. access-list OUTSIDE_cryptomap_3 extended permit ip 10. I would suggest you to check if you Now when I have a straight PA to PA over an external IP, no problem. The 2nd SA with the "OO_temp" access list shows no encaps, but the encaps/decaps counters for the SA to the private subnet were creeping up a little during the "hang": asa-5585x/pri/act# show crypto ipsec sa peer 1. PQClean fails the encaps/decaps test with both -O3 and -O0, but does not segfault. And now stuck. No packets encrypted and sent to client. Expand Post. 0/24 will goes towards interface F0/0 and then it will enter in ipsec tunnel and you will see the encaps packet. also as the previous poster noted, make sure your nat is set up correctly. This limitation would apply per peer. 119. 0 Likes Likes no ip address shutdown no fair-queue! interface FastEthernet0/1 description WAN ETHERNET ip address 10. Is what you Hi Cisco Guru, I am trying to set up a site to site VPn between IOS router and ASA as per above. The first line of the show cry ips sa peer command displays the network to network traffic and shows all the encaps, but that is followed by network to host/client stats and they each show only the decaps. Chinese; EN US; French; Japanese; Korean; Portuguese The ipsec vpn tunnel is up, but it is unstable. the issue is I can see encapsulated data but not able to decapsulate any data traffic. 151. Caller is responsible for allocating sufficient memory for ciphertext and shared_secret , based on the length_* members in this object or the per-scheme compile-time macros OQS_KEM_*_length_* . I have seen this symptom of one way traffic over site to site VPN and sometimes it is due to some routing issue and sometimes to issues Apologies I should of tested this before posting but I took and existing connection into AWS that is working and did the same packet tracer and it failed. Without having them check, the only thing you can do is show them your end's output like you just described here. . Meanwhile, Spoke1 does not show any packets flowing through the IPSEC tunnel. 5) get timed out, but when I look at show crypto ipsec sa on the Cisco 861 I see below. 255 Remote address:port > local address:port 1460 mtu<no, nop, sack, nop>. Things to change after test is. 0. I can also see that the tunnel has established so the issue isn't with the I have set up a VPN between a local ASA and Azure. 240. Leave a Comment / Blog / By Yasir Irfan Spread the love. Specifically the branch site asa is not doing encaps but has a few decaps, and then HQ asa is getting encaps but no decaps, Setup a site to site between a ASA context and another ASAv. The same goes for the opposite. For NAT typically you'd Assuming your router is configured correctly, you should get the other company to confirm their configuration and determine the output of "show crypto ipsec sa" and check It sounds like you have no NAT action, so the packets are dropped. You can fix this by either negating this command or allowing the vpn traffic though the Solved: Hi Got x2 2100 FTD's managed by same FMC and got the VPN up between the two but oneside has no decaps any ideas, ? there is no NAT configured do I need it as some docs suggest because it was working before one FTD got replaced due to failure if this is Csico ASA or Ciso Router is getting encaps but not decaps, this means it is encrypting the data and sending it but has not received anything to decrypt in return. Configs, packet trace and My end of the tunnel is on an ASAv in AWS. 134. This indicates that the problem can be on the NHRP protocol. The ASA seems to be doing what it should and you need to look at Meraki to find the configuration issue. It looks like I am much further on in my studies now. VIP Options. Cisco ASA L2L VPN - Phase 1 and 2 up with encaps/encrypts. If the tunnel is up and you are seeing decaps and no encaps that means exactly what Jennifer mentioned. It gets decaps from the Sophos, but no encaps going the other way. 255 any no ip nat inside source list 107 interface FastEthernet4 overload no ip nat inside source list 108 interface FastEthernet4 overload I would say the London side of the tunnel is fine because it is encrypting packets. Site to Site VPN, IPSec, The fact that there are no matches in the access list vpn seems to mean that there has not been any traffic from your end (from 192. Check for the NAT statement on your firewall whether the interesting traffic is properly interpreted. 2(2)4 FW1# packet-tracer input inside icm The main lines that we are looking at are the “packets encaps” and “packets decaps”. Raido_Rattameis ter. Traffic from behind the ASAv can reach the site behind the ASA. It seems like controller doesn't want encapsulate traffic from some reason. Here's my ASA config: interface Port-channel1. Options. 1(4)M6 and they are face to face. Mark as New; Bookmark; Subscribe; Mute; Subscribe to RSS Feed; Permalink; Print; Report Inappropriate Content ‎10-25-2017 10:14 PM - edited ‎03-12-2019 04:39 AM. Just to clarify the tunnel from the cisco side shows everything is peachy but once a month or so traffic will stop flowing for about Buy or Renew. 1 - the source(1. I have the NAT exempt rule set up and when I run packet tracer everything is allowed through. Im using a nearly identical config for another site that is using the same router and IOS version and it's working fine. € Troubleshooting Tools C library for prototyping and experimenting with quantum-resistant cryptography - Minimal example of a post quantum KEM · open-quantum-safe/liboqs Wiki Buy or Renew. 3550A has connection to 2691 via ospf. 2. 8. 0 ipsec sa clearing does not fix the problem. 14) show crypto isakmp sa 4 IKE Peer: 212. arwanadesign. 0 Likes Likes Reply. I did a packet trace from a local machine to one in Azure on port 139 and got this result: Phase: 9 Type: ACCESS-LIST ICMP is successful and packet encaps/decaps increase accordingly. No traffic is flowing through from either direction. The tunnel isnt working and there are no encaps and decaps on most of them. Double check the crypto ACL that defines interesting traffic and ensure traffic is not NATTED on the smoothwall. Shows phase 1 and phase 2 coming up without a problem. 3 with sec+ k9 ios I have configured client vpn (working with no problems at all) and a site to site VPN. 224. 1811 1811w# sh crypto isakmp s yes that's correct, but you've got two physical ASA's, so therefore you have unique SAs established on different ASAs. 69 access-list WAN_cryptomap_2 extended permit ip 10. After all we have encaps and decaps, but I saw the screenshot with encaps ASA B myself, so if I were on their end I would point fingers back at site A. 0 10. However, i can only see decaps, but no encaps. Labels: Labels: VPN; 0 Helpful Reply. If there has not been any traffic that matches the access list then there has not been anything that would initiate the ISAKMP negotiation or the IPSec negotiation. 9. 234 site but no traffic is getting encrypted from the 123. Base on the above output, encaps increases on the PIX ends, but no decaps, and the opposite on ASA ends, ie: decaps increase and encaps is zero. If you have decaps but not encaps, make sure Hi all, I have create a new site-to-site VPN with my client on my ASA. 6. So the LAN switch routes all outbound traffic via the ASA, which then has a default route via the correct outside interface? Which should now be the secondary interface right? Do you have a second NAT exemption rule specific to the secondary interface to ensure traffic is not The outputs show that on both spokes the IPSEC tunnel is up, but, Spoke2 shows encrypted packets (encaps) but no decrypted packets (decaps). 10. 255. #pkts encaps: 193262, #pkts encrypt: 193262, #pkts digest: 193262 #pkts encaps: 0, #pkts encrypt: 0, #pkts digest: 0 #pkts decaps: 516, #pkts decrypt: 516, #pkts verify: 516 . 14 and we have numerous other VPN's up and running, but only this one with Strongswan. This means it is encrypting the data and sending it but has not received anything to decrypt in return. 1 shows no decaps) Use the capture command to start Hi Guys, Recently encountered an issue in where Phase 2 of IPsec somehow not functioning well. 2) to a Juniper firewall. 33. I have two ASA 5510's that have been running a site to site for some time. 120. My issue is I If you look below, you can see going over a tunnel that the decaps are at 0 and the encaps are at 21. Hey Guys, I have been stuck and need yours support. However, ASA A sees BOTH encaps and decaps. packets are not being encapsulated, encrypted to the IPSec tunnel on following SA 10. But from the remote firewall it shows both encaps and decaps. L2L tunnel is up and working fine, I have configured two network in that one is working fine, but on the other network I am having this issue. I can see pkts encap:0 and pkts decaps increasing. The only difference is It gets decaps from the Sophos, but no encaps going the other way. Check that both VPN ACL’s are not mismatched. Does anybody know what can be the reason of such a controller behavoiur ? Regards Karol When I try to generate interesting traffic, the count of encryted and encapsulate packet goes up. The issue is the tunnel terminates on an interface in a zone different from where the ESP (Encapsulation Security Payloads) packets originate. Shown below is one command where a lot of information can be gained and requested from the customer: Hi, I have two office (main and brach) each with a cisco 887 router 15. The packets encapsulated are the packets you are pushing into the VPN. I could see that the Tunnel has came up and Active in both sides. The ping from one site to another on the interesting traffic looks like this: VoiceRTR-Qr#ping 10. it would appear your pix is properly sending out the packets but filtering them on the way back in. 2(4)22 vpn# sh capt capture capin type raw-data interface inside [Capturing - 12692 by Cisco ASA S2S VPN, no encaps only decaps I'm trying to ping across a S2S VPN but it's failing, phase 1 is MM_Active, phase 2 has 0 encaps and some decaps. Data collected via AWS cron using image "openquantumsafe/oqs-perf" I was just going through the outputs you have posted and I see that we have encaps on the router A side but no decaps. 118. Caller is responsible for allocating sufficient memory for shared_secret , based on the length_* members in this object or the per-scheme compile-time macros OQS_KEM_*_length_* . 2 to 1. Log In. 168. when the "the debug crypto ipsec sa show that the packts is encaps and encrpted but no decaps decrypt". Also the tracert result bothers me, as it shows stopped on our PA. Solved: Hello (and Happy Thanksgiving to those in the USA), We recently swapped our ASA and re-applied the saved config to the new device. Does anyone have a clue of why this happens? Cisco ASA VPN troubleshooting – Decaps but No encaps. 2 source 10. I Both ends get encaps and no decaps. The remote side is a Cisco ASR1002-X. 0/22(local LAN) ==>internet <==10. The tunnel is up, but no traffic is coming through, although on the ASA I'm seeing the counters for TX and RX increasing. I have verified ACL/NAT thoroughly but unable to find the root cause. No other traffic is getting passed the ASA. Very odd. I've gone through line by line and removed every remnant of Traffic from one side sees proper encaps and decaps whereas traffic from the other side does not see decaps. You can try initiating traffic from Router end and see whether the traffic is Hello, I have configured a site-to-site VPN between linux and Cisco ASA 5510. That could be related to routing if we use route-based VPN, NAT exemption that is not covering the interested traffic, or if we are sending traffic from or to IP When the traffic is initiated from the checkpoint the packets arrive at the router, they are decaps but the value of encaps does not increase . 31. I think it is something fairly simple but damned if I can see it. I can see the tunnel is up at both locations. The tunnel is showing as up in the ASDM but I cant ping anything on the local network from the remote site. Whatever traffic being sent from Site1 is being encrypted on Site1 ASA, it's then decrypted on DC ASA. One particular spoke was working for a few weeks with dual tunnels to each hub. 200. Troubleshooting I found that the router has only pkts encaps but pkts decaps is 0. One connection between two IPs at one point showed some decaps. Ok, well we have a ASA5520 using asa825-k8. #pkts decaps: 522628, #pkts decrypt: 522628, #pkts verify: 522628. I've gone through line by line and removed every remnant of it shows that tunnel is up also we can see traffic from Palo to aruba on datapath session table but when we see interface stats I see generaly only Decaps, no Encaps on tunnel interface. RT-897 decaps. It is one-way C2S traffic. by doing pings, 'show access-list' verifying the hits, and doing 'show crypto ipsec sa', I can see the encrypted packets increasing, however I have 0 decaps! I assume that the ot Ok, I need some help please with a problem with a Site to Site VPN. 2(4)22 vpn# sh capt capture Buy or Renew. 0/22 (Remote LAN) I did some troubelshooting a The packet-tracer command you showed doesn't actually simulate VPN traffic; packet-tracer simulates packets as ingressing the ASA from the wire, which is in your case the encrypted packets (with tunnel endpoints source/destination IPs). Rt-897 no encaps - RT no decaps. Level 1 Options. I reconfigured the tunnel but no luck. Traffic from the ASA gets encrypted (and I see the decaps on the ASAv), but I'm seeing drops in the log on the ASAv similar to thi #pkts encaps: 16, #pkts encrypt: 16, #pkts digest: 16 I saw the no decaps and I assumed the VPN is not configured correctly from the remote side. This connects to 3550A Switch which has connection to 1811W Router. ASA have static ip, and router have dynamic public IP. authentication pre-share Hello Can you please advice me on the following: there is a DMVPN setup and I can ping the IP addresses end to end from both sides; but when doing the show crypto ipsec sa command one end is showing #pkts encaps and decaps to both have values but the other end only has encaps but no decap Hi, I have an IPSEC site to site VPN between to Cisco ASA 5505 firewalls. 250. 1 | in pkts. The other 10 subnets on the Cisco side have no problems communicating back and forth. I just checked and at the hub I don't have an IPSec SA for the hub to that particular remote site (192. the packet tracer shows drop because you are running it from out-to-in and in that case you have to specifically allow that traffic on the outside interface acl. Troubleshooting Tools Hi Everyone, I have 2691 Router conencted to Internet and it is doing Nat. With "sh ipsec sa peer" I see the tunnel as up and there are encaps, but no decaps. Edited February 16, 2020 at 1:59 AM. Just need to lab out DMVPN :-) Hi experts, We have a problem as followings with ASA Lan to Lan VPN, - the source(1. 32. 0 ip nat outside duplex auto speed auto no cdp enable crypto map map! interface Serial0/1 no ip address shutdown! ip nat inside source list NAT_ADDRESSES interface FastEthernet0/1 overload no ip http server no ip http secure Hello Community, I am experiencing a strange behavior with a Dynamic IPSEC VPN Tunnel between an ASA and a IOS router, Both ph1 and ph2 are successful. When I tried to initiate the traffic from the Palo Alto side, I could see the encaps increasing on the IPSec tunnel, but zero decaps. The tunnel is established and I can ping in both directions but that's all I can do. 15. Mark as New; Bookmark; Subscribe; Mute; Subscribe to RSS Feed; Permalink; Print; Report Inappropriate Content ‎11-08-2016 02:06 PM. (PAN-OS 7. 1 encryption types won't be 3des. The tunnel is up but seeing odd behavior. encr 3des. i Dear community, we are facing the issue explained below. Verify the other end has a route outside for the interesting traffic. 0 no ip redirects no ip unreachables no ip proxy-arp ip nat inside ip virtual-reassembly in! interface Port We were not able to initiate any traffic from teh Palo side as by design we had no allow policy. The ipsec debug doesn't show any errors. EN US. Phase 1 of the vpn completes. 1 using default route so you need to add below static route so that traffic for 192. The crypto map shows packet decaps, but no encaps. I see it get encaps, but no decaps. For some days this configuration was running but then some packets started to drop and eventualy no traffic is transmited. This is between an ASA5505 and an Azure VPN Gateway. Answer selected by sungmin-net. My suspicion In what is right now a test environment I have dual hub DMVPN routers setup with 4 spokes. I've tried two no nat options. When I try to ping a local resource in either directions, packets go through the tunnel, decapsulated on the other end but the replies do not go bac Hello EE Have anyone of you folks ever had any issues with traffic not passing through randomly between a cisco asa 5510 8. EN US The PA traffic monitor will show packets has send to the remote network, but no packet receives (eg: no return traffic). I am wondering if the remtoe network didn't configure their route properly. Labels: Labels: VPN; ASA B sees encaps but no decaps. 10) can connect to another destination X. 10. qzgq auvxfpip hdytb kbcs nmxhm rtxn waabu kfzwodj hsoo pmhdj