how to check ipsec tunnel status cisco asa

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how to check ipsec tunnel status cisco asa

show vpn-sessiondb summary. Site to Site VPN Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! Down The VPN tunnel is down. 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. IPSec This synchronization allows events to be correlated when system logs are created and when other time-specific events occur. One way is to display it with the specific peer ip. 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. 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. 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. You can naturally also use ASDM to check the Monitoring section and from there the VPN section. Details 1. Next up we will look at debugging and troubleshooting IPSec VPNs. All of the devices used in this document started with a cleared (default) configuration. 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. If this is not done, then the the tunnel only gets negotiated as long as the ASA is the responder. This document assumes you have configured IPsec tunnel on ASA. - edited show vpn-sessiondb license-summary. : 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. IPSec and try other forms of the connection with "show vpn-sessiondb ?" One way is to display it with the specific peer ip. So using the commands mentioned above you can easily verify whether or not an IPSec tunnel is active, down, or still negotiating. The identity NAT rule simply translates an address to the same address. You can use a ping in order to verify basic connectivity. Hope this helps. Cisco recommends that you have knowledge of these topics: The information in this document is based on these versions: The information in this document was created from the devices in a specific lab environment. 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. ASA-1 and ASA-2 are establishing IPSCE Tunnel. New here? show vpn-sessiondb summary. failed: 0, #pkts not decompressed: 0, #pkts decompress failed: 0, local crypto endpt. Below command is a filter command use to see specify crypto map for specify tunnel peer. 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 IPsec Typically, there should be no NAT performed on the VPN traffic. if the tunnel is passing traffic the tunnel stays active and working? Ex. By default the router has 3600 seconds as lifetime for ipsec and 86400 seconds for IKE. cisco asa Details on that command usage are here. endpoint-dns-name is the DNS name of the endpoint of the tunnel interface. If it is an initiator, the tunnel negotiation fails and PKI and IKEv2 debugs on the router show this: Use this section in order to confirm that your configuration works properly. If you change the debug level, the verbosity of the debugs can increase. Details 1. Connection : 10.x.x.x.Index : 3 IP Addr : 10..x.x.xProtocol : IKE IPsecEncryption : AES256 Hashing : SHA1Bytes Tx : 3902114912 Bytes Rx : 4164563005Login Time : 21:10:24 UTC Sun Dec 16 2012Duration : 22d 18h:55m:43s. Tunnel In order to troubleshoot IPSec IKEv1 tunnel negotiation on an IOS router, you can use these debug commands: Note: If the number of VPN tunnels on the IOS is significant, thedebug crypto condition peer ipv4 A.B.C.D should be used before you enable the debugs in order to limit the debug outputs to include only the specified peer. Secondly, check the NAT statements. If the lifetimes are not identical, then the ASA uses the shorter lifetime. WebUse the following commands to verify the state of the VPN tunnel: show crypto isakmp sa should show a state of QM_IDLE. In order to automatically verify whether the IPSec LAN-to-LAN configuration between the ASA and IOS is valid, you can use the IPSec LAN-to-LAN Checker tool. 04-17-2009 07:07 AM. However, I wanted to know what was the appropriate "Sh" commands i coud use to confirm the same. New here? 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. 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. 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. 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. You can use a ping in order to verify basic connectivity. Details on that command usage are here. Cisco ASA The following examples shows the username William and index number 2031. 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. Web0. cisco asa Ex. How can I detect how long the IPSEC tunnel has been up on the router? How to check Status View the Status of the Tunnels. 06:02 PM. However, I wanted to know what was the appropriate "Sh" commands i coud use to confirm the same. ASA#more system:running-config | b tunnel-group [peer IP add] Display Uptime, etc. Can you please help me to understand this? 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. 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. All of the devices used in this document started with a cleared (default) configuration. If the traffic passes through the tunnel, you must see the encaps/decaps counters increment. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! WebUse the following commands to verify the state of the VPN tunnel: show crypto isakmp sa should show a state of QM_IDLE. In order to troubleshoot IPSec IKEv1 tunnel negotiation on an ASA firewall, you can use thesedebugcommands: Caution: On the ASA, you can set various debug levels; by default, level 1 is used. So seems to me that your VPN is up and working. All of the devices used in this document started with a cleared (default) configuration. The ASA then applies the matched transform set or proposal in order to create an SA that protects data flows in the access list for that crypto map. Can you please help me to understand this? When the lifetime of the SA is over, the tunnel goes down? Cert Distinguished Name for certificate authentication. This command show crypto isakmp sa Command shows the Internet Security Association Management Protocol (ISAKMP) security associations (SAs) built between peers.AM_ACTIVE / MM_ACTIVE The ISAKMP negotiations are complete. If a site-site VPN is not establishing successfully, you can debug it. access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.0.0 0.0.0.255. BGP Attributes Path Selection algorithm -BGP Attributes influence inbound and outbound traffic policy. 07:52 AM 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. The documentation set for this product strives to use bias-free language. This document can be used to verify the status of an IPSEC tunnel, validate tunnel monitoring, clear the tunnel, and restore the tunnel. Refer to the Certificate to ISAKMP Profile Mapping section of the Internet Key Exchange for IPsec VPNs Configuration Guide, Cisco IOS XE Release 3S Cisco document for information about how to set this up. show vpn-sessiondb l2l. show vpn-sessiondb detail l2l. This document can be used to verify the status of an IPSEC tunnel, validate tunnel monitoring, clear the tunnel, and restore the tunnel. Refer to Most Common IPsec L2L and Remote Access IPsec VPN Troubleshooting Solutions for information on the most common solutions to IPsec VPN problems. 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. Hopefully the above information Note: Refer to Important Information on Debug Commands before you use debug commands. If the traffic passes through the tunnel, you must see the encaps/decaps counters increment. So using the commands mentioned above you can easily verify whether or not an IPSec tunnel is active, down, or still negotiating. Please try to use the following commands. 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. 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. Some of the command formats depend on your ASA software level. Show Version command show the Device Uptime, software version, license details, Filename, hardware details etc. The documentation set for this product strives to use bias-free language. detect how long the IPSEC tunnel has been IPSec LAN-to-LAN Checker Tool. The first output shows the formed IPsec SAs for the L2L VPN connection. IKEv1: Tunnel ID : 3.1 UDP Src Port : 500 UDP Dst Port : 500 IKE Neg Mode : Main Auth Mode : preSharedKeys Encryption : AES256 Hashing : SHA1 Rekey Int (T): 86400 Seconds Rekey Left(T): 82325 Seconds D/H Group : 2 Filter Name : IPv6 Filter : IPsec: Tunnel ID : 3.2 Local Addr : 192.168.2.128/255.255.255.192/0/0 Remote Addr : 0.0.0.0/0.0.0.0/0/0 Encryption : AES256 Hashing : SHA1 Encapsulation: Tunnel Rekey Int (T): 28800 Seconds Rekey Left(T): 24725 Seconds Rekey Int (D): 4608000 K-Bytes Rekey Left(D): 4607701 K-Bytes Idle Time Out: 30 Minutes Idle TO Left : 29 Minutes Bytes Tx : 71301 Bytes Rx : 306744 Pkts Tx : 1066 Pkts Rx : 3654. 01-08-2013 and it remained the same even when I shut down the WAN interafce of the router. 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). In order to do this, when you define the trustpoint under the crypto map add the chain keyword as shown here: If this is not done, then the the tunnel only gets negotiated as long as the ASA is the responder. These are the peers with which an SA can be established. Cisco ASA 07-27-2017 03:32 AM. 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. There is a global list of ISAKMP policies, each identified by sequence number. 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. 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. 2023 Cisco and/or its affiliates. So using the commands mentioned above you can easily verify whether or not an IPSec tunnel is active, down, or still negotiating. Download PDF. Cisco recommends that you have knowledge of these topics: The information in this document is based on these software and hardware versions: The information in this document was created from the devices in a specific lab environment. and try other forms of the connection with "show vpn-sessiondb ?" Cisco ASA IPsec VPN Troubleshooting Command Typically, there must be no NAT performed on the VPN traffic. If the ASA is configured with a certificate that has Intermediate CAs and its peer doesnot have the same Intermediate CA, then the ASA needs to be explicitly configured to send the complete certificate chain to the router. 2023 Cisco and/or its affiliates. How can i check this on the 5520 ASA ? Miss the sysopt Command. In order to automatically verify whether the IPSec LAN-to-LAN configuration between the ASA and IOS is valid, you can use the IPSec LAN-to-LAN Checker tool. 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 Certificate authentication requires that the clocks on alldevices used must be synchronized to a common source. Here IP address 10.x is of this ASA or remote site? 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. Secondly, check the NAT statements. I am sure this would be a piece of cake for those acquinted with VPNs. 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. To check if phase 2 ipsec tunnel is up: GUI: Navigate to Network->IPSec Tunnels GREEN indicates up RED indicates down. The good thing is that i can ping the other end of the tunnel which is great. Phase 2 = "show crypto ipsec sa". 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. Both output wouldnt show anything if there was any active L2L VPN connections so the VPN listed by the second command is up. Configure tracker under the system block. This section describes how to complete the ASA and IOS router CLI configurations. How to check IPSEC VPN is up or not via cisco asdm for particular client, Customers Also Viewed These Support Documents. ASA 5505 has default gateway configured as ASA 5520. The tool is designed so that it accepts a show tech or show running-config command from either an ASA or IOS router. Some of the command formats depend on your ASA software level. ASA-1 and ASA-2 are establishing IPSCE Tunnel. How to check Configure IKE. The ASA supports IPsec on all interfaces. Here are few more commands, you can use to verify IPSec tunnel. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! For IKEv1, the remote peer policy must also specify a lifetime less than or equal to the lifetime in the policy that the initiator sends. If the lifetimes are not identical, then the ASA uses a shorter lifetime. Thank you in advance. 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 Hope this helps. 03-11-2019 These commands work on both ASAs and routers: Note: In this output, unlike in IKEv1, the Perfect Forwarding Secrecy (PFS) Diffie-Hellman (DH) group value displays as 'PFS (Y/N): N, DH group: none' during the first tunnel negotiation; after a rekey occurs, the correct values appear. Also,If you do not specify a value for a given policy parameter, the default value is applied. To Check L2L tunnel status In your case the above output would mean that L2L VPN type connection has been formed 3 times since the last reboot or clearing of these statistics. This traffic needs to be encrypted and sent over an Internet Key Exchange Version 1 (IKEv1) tunnel between ASA and stongSwan server. 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. show crypto isakmp sa. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. You should see a status of "mm active" for all active tunnels. How to check IPSEC access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.0.0 0.0.0.255. Caution: On the ASA, you can set various debug levels; by default, level 1 is used. Also want to see the pre-shared-key of vpn tunnel. If the traffic passes through the tunnel, you should see the encaps/decaps counters increment. 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. ** Found in IKE phase I aggressive mode. Note:An ACL for VPN traffic uses the source and destination IP addresses after Network Address Translation (NAT). Phase 2 = "show crypto ipsec sa". Access control lists can be applied on a VTI interface to control traffic through VTI. show vpn-sessiondb ra-ikev1-ipsec. Note:On the ASA, the packet-tracer tool that matches the traffic of interest can be used in order to initiate the IPSec tunnel (such as packet-tracer input inside tcp 10.10.10.10 12345 10.20.10.10 80 detailed for example). In order to enable IKEv1, enter the crypto ikev1 enable command in global configuration mode: For a LAN-to-LAN tunnel, the connection profile type is ipsec-l2l. private subnet behind the strongSwan, expressed as network/netmask. Note:On the ASA, the packet-tracer tool that matches the traffic of interest can be used in order to initiate the IPSec tunnel (such aspacket-tracer input inside tcp 192.168.1.100 12345 192.168.2.200 80 detailedfor example). 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. crypto ipsec transform-set my-transform esp-3des esp-sha-hmac, access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.0.0 0.0.0.255. 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.