Details 1. New here? Check IPSEC Tunnel Status with IP New here? Assigning the crypto map set to an interface instructs the ASA to evaluate all the traffic against the crypto map set and to use the specified policy during connection or SA negotiation. This document can also be used with these hardware and software versions: Configuration of an IKEv2 tunnel between an ASA and a router with the use of pre-shared keys is straightforward. I tried Monitoring-->VPN Statistics--> Session--->Filtered By---> IPSec Site-to-site . Here is an example: Note:You can configure multiple IKE policies on each peer that participates in IPSec. 11-01-2017 02-21-2020 - edited For the scope of this post Router (Site1_RTR7200) is not used. View with Adobe Reader on a variety of devices, View in various apps on iPhone, iPad, Android, Sony Reader, or Windows Phone, View on Kindle device or Kindle app on multiple devices. You should see a status of "mm active" for all active tunnels. Phase 2 Verification. show crypto ipsec client ezvpn should show a state of IPSEC ACTIVE; If the VPN tunnel is not up, issue a ping to AD1 sourced from VLAN 10. It also lists the packet counters which in your situation seem to indicate traffic is flowing in both directions. To confirm data is actually sent and received over the VPN, check the output of "show crypto ipsec sa" and confirm the counters for encaps|decaps are increasing. access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.0.0 0.0.0.255. Could you please list down the commands to verify the status and in-depth details of each command output ?. IPSec LAN-to-LAN Checker Tool. Phase 1 = "show crypto isakmp sa" or "show crypto ikev1 sa" or "show crypto ikev2 sa". WebUse the following commands to verify the state of the VPN tunnel: show crypto isakmp sa should show a state of QM_IDLE. By default the router has 3600 seconds as lifetime for ipsec and 86400 seconds for IKE. Please rate helpful and mark correct answers. Details on that command usage are here. 2023 Cisco and/or its affiliates. Download PDF. Similarly, by default the ASA selects the local ID automatically so, when cert auth is used, it sends the Distinguished Name (DN) as the identity. Some of the command formats depend on your ASA software level, Hopefully the above information was helpfull, The field with "Connection: x.x.x.x" lists the remote VPN device IP address, The field with "Login Time" lists the time/date when the L2L VPN was formed, The field with "Duration" shows how long the L2L VPN has been up, Rest of the fields give information on the encryption, data transfered etc. In order to configure the Internet Security Association and Key Management Protocol (ISAKMP) policies for the IKEv1 connections, enter the crypto ikev1 policy command: Note:An IKEv1 policy match exists when both of the policies from the two peers contain the same authentication, encryption, hash, and Diffie-Hellman parameter values. show crypto isakmp sa. The router does this by default. This command show run crypto mapis e use to see the crypto map list of existing Ipsec vpn tunnel. I tried Monitoring-->VPN Statistics--> Session--->Filtered By---> IPSec Site-to-site . Can you please help me to understand this? All rights reserved. Hope this helps. Cisco ASA On the other side, when the lifetime of the SA is over, the tunnel goes down? IPSec LAN-to-LAN Checker Tool. Thank you in advance. access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.0.0 0.0.0.255. Note: On the router, a certificate map that is attached to the IKEv2 profile mustbe configured in order to recognize the DN. Phase 1 = "show crypto isakmp sa" or "show crypto ikev1 sa" or "show crypto ikev2 sa". Configure tracker under the system block. This is the destination on the internet to which the router sends probes to determine the Phase 2 = "show crypto ipsec sa". It protects the outbound packets that match a permit Application Control Engine (ACE) and ensures that the inbound packets that match a permit ACE have protection. endpoint-dns-name is the DNS name of the endpoint of the tunnel interface. It examines the configuration and attempts to detect whether a crypto map based LAN-to-LAN IPSec tunnel is configured. If your network is live, make sure that you understand the potential impact of any command. You can do a "show crypto ipsec sa detail" and a "show crypto isakmp sa detail" both of them will give you the remaining time of the configured lifetime. In order to do this, when you define the trustpoint under the crypto map add the chain keyword as shown here: crypto map outside-map 1 set trustpoint ios-ca chain. Regards, Nitin Use the sysopt connection permit-ipsec command in IPsec configurations on the PIX in order to permit IPsec traffic to pass through the PIX Firewall without a check of conduit or access-list command statements.. By default, any inbound session must be explicitly permitted by a conduit or access-list command Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. 1. This document describes common Cisco ASA commands used to troubleshoot IPsec issue. Compromise of the key pair used by a certicate. WebTo configure the IPSec VPN tunnel on Cisco ASA 55xx firewall running version 9.6: 1. If peer ID validation is enabled and if IKEv2 platform debugs are enabled on the ASA, these debugs appear: For this issue, either the IP address of the certificate needs to be included in the peercertificate, or peer ID validation needs to be disabled on the ASA. This command show crypto ipsec stats is use to Data Statistics of IPsec tunnels. Can you please help me to understand this? View with Adobe Reader on a variety of devices, Configure the IKEv1 Policy and Enable IKEv1 on the Outside Interface, Configure the Tunnel Group (LAN-to-LAN Connection Profile), Configure the ACL for the VPN Traffic of Interest, Configure a Crypto Map and Apply it to an Interface, Configure an ACL for VPN Traffic of Interest, IP Security Troubleshooting - Understanding and Using debug Commands, Most Common L2L and Remote Access IPSec VPN Troubleshooting Solutions, Technical Support & Documentation - Cisco Systems, Cisco 5512-X Series ASA that runs software Version 9.4(1), Cisco 1941 Series Integrated Services Router (ISR) that runs Cisco IOS software Version 15.4(3)M2, An access list in order to identify the packets that the IPSec connection permits and protects, The IPsec peers to which the protected traffic can be forwarded must be defined. If your network is live, ensure that you understand the potential impact of any command. - edited 07-27-2017 03:32 AM. cisco asa Assigning the crypto map set to an interface instructs the ASA to evaluate all the traffic against the crypto map set and to use the specified policy during connection or SA negotiation. Establish a policy for the supported ISAKMP encryption, authentication Diffie-Hellman, lifetime, and key parameters. show vpn-sessiondb l2l. 02-21-2020 Thank you in advance. How can i check this on the 5520 ASA ? IPsec "show crypto session " should show this information: Not 100% sure for the 7200 series, butin IOS I can use. For more information, refer to the Information About Resource Management section of the CLI Book 1: Cisco ASA Series General Operations CLI Configuration Guide, 9.8. check IPSEC tunnel Miss the sysopt Command. Note: Ensure that there is connectivity to both the internal and external networks, and especially to the remote peer that is used in order to establish a site-to-site VPN tunnel. When the lifetime of the SA is over, the tunnel goes down? IPsec tunnel How to check the status of the ipsec VPN tunnel? Status With a ping passing about the tunnel and the timer explired, the SA are renegotiated but the tunnel stay UP and the ping not losses any packet. Enter the show vpn-sessiondb command on the ASA for verification: Enter the show crypto session command on the IOS for verification: This section provides information that you can use in order to troubleshoot your configuration. show vpn-sessiondb l2l. Need to check how many tunnels IPSEC are running over ASA 5520. How to check Status The good thing is that i can ping the other end of the tunnel which is great. You can use a ping in order to verify basic connectivity. IPSec Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Web0. : 30.0.0.1, path mtu 1500, ip mtu 1500, ip mtu idb FastEthernet0/1, slot: 0, conn id: 2002, flow_id: 3, crypto map: branch-map, sa timing: remaining key lifetime (k/sec): (4553941/2400), slot: 0, conn id: 2003, flow_id: 4, crypto map: branch-map, sa timing: remaining key lifetime (k/sec): (4553941/2398). The second output also lists samekind of information but also some additional information that the other command doesnt list. Note:If there are multiple VPN tunnels on the ASA, it is recommended to use conditional debugs (debug crypto condition peer A.B.C.D), in order to limit the debug outputs to include only the specified peer. If the lifetimes are not identical, then the ASA uses a shorter lifetime. The following is sample output from the show vpn-sessiondb detail l2l command, showing detailed information about LAN-to-LAN sessions: The command show vpn-sessiondb detail l2l provide details of vpn tunnel up time, Receiving and transfer Data. How to check IPsec I would try the following commands to determine better the L2L VPN state/situation, You can naturally also use ASDM to check the Monitoring section and from there the VPN section. ASA#show crypto ipsec sa peer [peer IP add] Display the PSK. However, I wanted to know what was the appropriate "Sh" commands i coud use to confirm the same. An encrypted tunnel is built between 68.187.2.212 and 212.25.140.19. 04-17-2009 07:07 AM. Cisco ASA For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. The expected output is to see both the inbound and outbound Security Parameter Index (SPI). Establish a policy for the supported ISAKMP encryption, authentication Diffie-Hellman, lifetime, and key parameters. This usually results in fragmentation, which can then cause the authentication to fail if a fragment is lost or dropped in the path. WebThe following is sample output from the show vpn-sessiondb detail l2l command, showing detailed information about LAN-to-LAN sessions: The command show vpn-sessiondb detail l2l provide details of vpn tunnel up time, Receiving and transfer Data Cisco-ASA# sh vpn-sessiondb l2l Session Type: LAN-to-LAN Connection : 212.25.140.19 Index : 17527 IP show vpn-sessiondb detail l2l. Access control lists can be applied on a VTI interface to control traffic through VTI. 20.0.0.1, local ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0), remote ident (addr/mask/prot/port): (172.16.0.0/255.255.255.0/0/0), #pkts encaps: 1059, #pkts encrypt: 1059, #pkts digest 1059, #pkts decaps: 1059, #pkts decrypt: 1059, #pkts verify 1059, #pkts compressed: 0, #pkts decompressed: 0, #pkts not compressed: 0, #pkts compr. You must assign a crypto map set to each interface through which IPsec traffic flows. Configure IKE. Set Up Site-to-Site VPN. Note: Refer to Important Information on Debug Commands before you use debug commands. Customers Also Viewed These Support Documents. Cisco ASA To permit any packets that come from an IPsec tunnel without checking ACLs for the source and destination interfaces, enter the sysopt connection permit-vpn command in global configuration mode. : 10.31.2.30/0 path mtu 1500, ipsec overhead 74(44), media mtu 1500 PMTU time remaining (sec): 0, DF policy: copy-df ICMP error validation: disabled, TFC packets: disabled current outbound spi: 06DFBB67 current inbound spi : 09900545, inbound esp sas: spi: 0x09900545 (160433477) transform: esp-aes-256 esp-sha-hmac no compression in use settings ={L2L, Tunnel, IKEv1, } slot: 0, conn_id: 12288, crypto-map: COMMC_Traffic_Crypto sa timing: remaining key lifetime (kB/sec): (3914702/24743) IV size: 16 bytes replay detection support: Y Anti replay bitmap: 0xFFFFFFFF 0xFFFFFFFF outbound esp sas: spi: 0x06DFBB67 (115325799) transform: esp-aes-256 esp-sha-hmac no compression in use settings ={L2L, Tunnel, IKEv1, } slot: 0, conn_id: 12288, crypto-map: COMMC_Traffic_Crypto sa timing: remaining key lifetime (kB/sec): (3914930/24743) IV size: 16 bytes replay detection support: Y Anti replay bitmap: 0x00000000 0x00000001, Connection : 10.31.2.30Index : 3 IP Addr : 10.31.2.30Protocol : IKEv1 IPsecEncryption : IKEv1: (1)AES256 IPsec: (1)AES256Hashing : IKEv1: (1)SHA1 IPsec: (1)SHA1Bytes Tx : 71301 Bytes Rx : 305820Login Time : 11:59:24 UTC Tue Jan 7 2014Duration : 1h:07m:54sIKEv1 Tunnels: 1IPsec Tunnels: 1. Certicates canbe revoked for a number of reasons such as: The mechanism used for certicate revocation depends on the CA. Complete these steps in order to set up the site-to-site VPN tunnel via the ASDM wizard: Open the ASDM and navigate to Wizards > VPN Wizards > Site-to-site VPN Wizard: Click Next once you reach the wizard home page: Note: The most recent ASDM versions provide a link to a video that explains this configuration. If this is not done, then the the tunnel only gets negotiated as long as the ASA is the responder. Ex. Tunnel "My concern was the output of "sh crypto isakmp sa" was always showing as "QM_idle". I configured the Cisco IPSec VPN from cisco gui in asa, however, i would like to know, how to check whether the vpn is up or not via gui for [particular customer. 07-27-2017 03:32 AM. The expected output is to see the ACTIVE state: In order to verify whether IKEv1 Phase 2 is up on the ASA, enter theshow crypto ipsec sa command. ASA#show crypto ipsec sa peer [peer IP add] Display the PSK. By default the router has 3600 seconds as lifetime for ipsec and 86400 seconds for IKE. Hopefully the above information Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! If the traffic passes through the tunnel, you must see the encaps/decaps counters increment. The first thing to validate is that the route for the remote network is correct and pointing to the crypto map interface (typically the outside interface). Here IP address 10.x is of this ASA or remote site? Maximum Transmission Unit MTU-TCP/IP Networking world, BGP and OSPF Routing Redistribution Lab default-information originate, BGP LOCAL_PREF & AS-Prepend || BGP LAB Config || BGP Traffic Engineering, BGP Message Type and Format | Open, update,Notification and Keep-alive, F5 Big IP LTM Setup of Virtual Interface Profile and Pool. Status Details 1. How to check I tried Monitoring-->VPN Statistics--> Session--->Filtered By---> IPSec Site-to-site . The router does this by default. An ACL for VPN traffic uses the source and destination IP addresses after Network Address Translation (NAT). check IPSEC tunnel For each ACL entry there is a separate inbound/outbound SA created, which can result in a long. However, there is a difference in the way routers and ASAs select their local identity. You can naturally also use ASDM to check the Monitoring section and from there the VPN section. New here? Check Phase 1 Tunnel. If software versions that do not have the fix for Cisco bug ID CSCul48246 are used on the ASA, then the HTTP-URL-based lookup is not negotiated on the ASA, and Cisco IOS software causes the authorization attempt to fail. * Found in IKE phase I main mode. The first thing to validate is that the route for the remote network is correct and pointing to the crypto map interface (typically the outside interface). 01-08-2013 BGP Attributes - Path Selection algorithm -BGP Attributes influence inbound and outbound traffic policy. Is there any way to check on 7200 series router. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! Are you using Easy VPN or something because it says that the remote address is 0.0.0.0/0 ? The documentation set for this product strives to use bias-free language. The output you are looking at is of Phase 1 which states that Main Mode is used and the Phase 1 seems to be fine. The expected peer ID is also configured manually in the same profile with the match identity remote command: On ASAs, the ISAKMP identity is selected globally with the crypto isakmp identity command: By default, the command mode is set to auto, which means that the ASA determines ISAKMP negotiation by connection type: Note: Cisco bug ID CSCul48099 is an enhancement request for the ability to configure on a per-tunnel-group basis rather than in the global configuration. Ensure that the NAT (or noNAT) statement is not being masked by any other NAT statement. Site to Site VPN Here is an example: Ensure that there is connectivity to both the internal and external networks, and especially to the remote peer that will be used in order to establish a site-to-site VPN tunnel. All rights reserved. Note:An ACL for VPN traffic uses the source and destination IP addresses after Network Address Translation (NAT). This command show the output such as the #pkts encaps/encrypt/decap/decrypt, these numbers tell us how many packets have actually traversed the IPsec tunnel and also verifies we are receiving traffic back from the remote end of the VPN tunnel. When i do sh crypto isakmp sa on 5505 it shows peer tunnel IP but state is MM_ACTIVE. Set Up Site-to-Site VPN. 03-12-2019 ASA#show crypto isakmp sa detail | b [peer IP add] Check Phase 2 Tunnel. I am curious how to check isakmp tunnel up time on router the way we can see on firewall. Cisco ASA When IKEv2 tunnels are used on routers, the local identity used in the negotiation is determined by the identity local command under the IKEv2 profile: By default, the router uses the address as the local identity. Regards, Nitin Ensure that the NAT (or noNAT) statement is not being masked by any other NAT statement. By default the router has 3600 seconds as lifetime for ipsec and 86400 seconds for IKE. In order to verify whether IKEv1 Phase 2 is up on the ASA, enter the show crypto ipsec sa command.