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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. This document describes how to set up a site-to-site Internet Key Exchange version 2 (IKEv2) tunnel between a Cisco Adaptive Security Appliance (ASA) and a router that runs Cisco IOS software. New here? NTP synchronizes the timeamong a set of distributed time servers and clients. - edited WebTo configure the IPSec VPN tunnel on Cisco ASA 55xx firewall running version 9.6: 1. Hopefully the above information How can I detect how long the IPSEC tunnel has been up on the router? Certificate authentication requires that the clocks on alldevices used must be synchronized to a common source. Then you will have to check that ACLs contents either with. 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. Here is an example: Note:An ACL for VPN traffic uses the source and destination IP addresses after NAT. Customers Also Viewed These Support Documents. 2023 Cisco and/or its affiliates. - edited ASA#more system:running-config | b tunnel-group [peer IP add] Display Uptime, etc. Common places are, IKEv1/IKEv2 Between Cisco IOS and strongSwan Configuration Example, Configure a Site-to-Site IPSec IKEv1 Tunnel Between an ASA and a Cisco IOS Router. In order to configure the ISAKMP policies for the IKEv1 connections, enter the crypto isakmp policy command in global configuration mode. The router does this by default. I was trying to bring up a VPN tunnel (ipsec) using Preshared key. If this is not done, then the the tunnel only gets negotiated as long as the ASA is the responder. Remote ID validation is done automatically (determined by the connection type) and cannot be changed. In order to verify whether IKEv1 Phase 1 is up on the ASA, enter theshow crypto ikev1 sa (or,show crypto isakmp sa)command. show vpn-sessiondb l2l. The expected output is to see both the inbound and outbound SPI. Down The VPN tunnel is down. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. In order to specify the transform sets that can be used with the crypto map entry, enter the, The traffic that should be protected must be defined. If you shut down the WAN interface, the isakmp phase I and Phase II will remains until rekey is happening. 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. In order to specify an extended access list for a crypto map entry, enter the. ASA#more system:running-config | b tunnel-group [peer IP add] Display Uptime, etc. Or does your Crypto ACL have destination as "any"? 04:41 AM. - edited : 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 expected output is to see the MM_ACTIVE state: In order to verify whether the IKEv1 Phase 1 is up on the IOS, enter the show crypto isakmp sa command. Updated device and software under Components Used. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! Updated to remove PII, title correction, introduction length, machine translation, style requirements, gerunds and formatting. endpoint-dns-name is the DNS name of the endpoint of the tunnel interface. IPSec LAN-to-LAN Checker Tool. 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. I tried Monitoring-->VPN Statistics--> Session--->Filtered By---> IPSec Site-to-site. Data is transmitted securely using the IPSec SAs. I tried Monitoring-->VPN Statistics--> Session--->Filtered By---> IPSec Site-to-site . We are mentioning the steps are listed below and can help streamline the troubleshooting process for you. 1. If the traffic passes through the tunnel, you should see the encaps/decaps counters increment. Hi guys, I am curious how to check isakmp tunnel up time on router the way we can see on firewall. If you are looking at flushing the tunnel when the interface goes down then you have to enable keepalives. ASA-1 and ASA-2 are establishing IPSCE Tunnel. 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. Do this with caution, especially in production environments! 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. 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. Access control lists can be applied on a VTI interface to control traffic through VTI. Set Up Tunnel Monitoring. Here is an example: Note:You can configure multiple IKE policies on each peer that participates in IPSec. 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. I tried Monitoring-->VPN Statistics--> Session--->Filtered By---> IPSec Site-to-site . 01-08-2013 This command show crypto IPsec sa shows IPsec SAs built between peers. If IKEv2 debugs are enabled on the router, these debugs appear: For this issue, either configure the router in order to validate the fully qualified domain name (FQDN) or configure the ASA in order to use address as the ISAKMP ID. Note:An ACL for VPN traffic uses the source and destination IP addresses after Network Address Translation (NAT). 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, 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. Ensure charon debug is enabled in ipsec.conf file: Where the log messages eventually end up depends on how syslog is configured on your system. 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. 07-27-2017 03:32 AM. Tip: Refer to the Most Common L2L and Remote Access IPSec VPN Troubleshooting Solutions Cisco document for more information about how to troubleshoot a site-to-site VPN. 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. You might have to use a drop down menu in the actual VPN page to select Site to Site VPN / L2L VPN show you can list the L2L VPN connections possibly active on the ASA. The first output shows the formed IPsec SAs for the L2L VPN connection. 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 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 Initiate VPN ike phase1 and phase2 SA manually. In order to troubleshoot IPSec IKEv1 tunnel negotiation on an ASA firewall, you can use these debug commands: Note: If the number of VPN tunnels on the ASA is significant, thedebug crypto condition peer A.B.C.D command should be used before you enable the debugs in order to limit the debug outputs to include only the specified peer. To see details for a particular tunnel, try: show vpn-sessiondb l2l. The expected output is to see both the inbound and outbound Security Parameter Index (SPI). 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. 04-17-2009 - edited and try other forms of the connection with "show vpn-sessiondb ?" 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. sh crypto ipsec sa peer 10.31.2.30peer address: 10.31.2.30 Crypto map tag: COMMC_Traffic_Crypto, seq num: 1, local addr: 10.31.2.19, access-list XC_Traffic extended permit ip 192.168.2.128 255.255.255.192 any local ident (addr/mask/prot/port): (192.168.2.128/255.255.255.192/0/0) remote ident (addr/mask/prot/port): (0.0.0.0/0.0.0.0/0/0) current_peer: 10.31.2.30, #pkts encaps: 1066, #pkts encrypt: 1066, #pkts digest: 1066 #pkts decaps: 3611, #pkts decrypt: 3611, #pkts verify: 3611 #pkts compressed: 0, #pkts decompressed: 0 #pkts not compressed: 1066, #pkts comp failed: 0, #pkts decomp failed: 0 #pre-frag successes: 0, #pre-frag failures: 0, #fragments created: 0 #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0 #TFC rcvd: 0, #TFC sent: 0 #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0 #send errors: 0, #recv errors: 0, local crypto endpt. 2023 Cisco and/or its affiliates. "My concern was the output of "sh crypto isakmp sa" was always showing as "QM_idle". Phase 2 Verification. You must assign a crypto map set to each interface through which IPsec traffic flows. I used the following "show" commands, "show crypto isakmp sa" and "sh crypto ipsec sa" and Phase 2 = "show crypto ipsec sa". Some of the command formats depend on your ASA software level. 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. Here IP address 10.x is of this ASA or remote site? the "QM_idle", will remain idle for until security association expires, after which it will go to "deleted state". For the scope of this post Router (Site1_RTR7200) is not used. The good thing is that i can ping the other end of the tunnel which is great. All of the devices used in this document started with a cleared (default) configuration. In order to verify whether IKEv1 Phase 2 is up on the ASA, enter the show crypto ipsec sa command. 07-27-2017 03:32 AM. Where the log messages eventually end up depends on how syslog is configured on your system. 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. any command? If your network is live, ensure that you understand the potential impact of any command. The ASA supports IPsec on all interfaces. ** Found in IKE phase I aggressive mode. Some of the command formats depend on your ASA software level. Find answers to your questions by entering keywords or phrases in the Search bar above. View the Status of the Tunnels. Alternatively, you can make use of the commandshow vpn-sessiondbtoverify the details for both Phases 1 and 2, together. WebUse the following commands to verify the state of the VPN tunnel: show crypto isakmp sa should show a state of QM_IDLE. 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, Resource Allocation in Multi-Context Mode on ASA, Validation of the Certificate Revocation List, Network Time Protocol: Best Practices White Paper, CLI Book 1: Cisco ASA Series General Operations CLI Configuration Guide, 9.8, Public Key Infrastructure Configuration Guide, Cisco IOS XE Release 3S, Certificates and Public Key Infrastructure (PKI), Cisco ASA 5506 Adaptive Security Appliance that runs software version 9.8.4, Cisco 2900 Series Integrated Services Router (ISR) that runs Cisco IOS software version 15.3(3)M1, Cisco ASA that runs software version 8.4(1) orlater, Cisco ISR Generation 2 (G2) that runs Cisco IOS software version 15.2(4)M or later, Cisco ASR 1000 Series Aggregation Services Routers that run Cisco IOS-XE software version 15.2(4)S or later, Cisco Connected Grid Routers that run software version 15.2(4)M or later. New here? This command show crypto ipsec stats is use to Data Statistics of IPsec tunnels. Typically, this is the outside (or public) interface. For each ACL entry there is a separate inbound/outbound SA created, which can result in a long. Customers Also Viewed These Support Documents. PAN-OS Administrators Guide. The identity NAT rule simply translates an address to the same address. Hope this helps. Establish a policy for the supported ISAKMP encryption, authentication Diffie-Hellman, lifetime, and key parameters. Remember to turn off all debugging when you're done ("no debug all"). show crypto isakmp sa. This document assumes you have configured IPsec tunnel on ASA. This usually results in fragmentation, which can then cause the authentication to fail if a fragment is lost or dropped in the path. Down The VPN tunnel is down. Note:If there is a need to add a new subnet to the protected traffic, simply add a subnet/host to the respective object-group and complete a mirror change on the remote VPN peer. * Found in IKE phase I main mode. This section describes the commands that you can use on the ASA or IOS in order to verify the details for both Phases 1 and 2. This procedure verifies phase 1 activity: This procedure describes how to verify if the Security Parameter Index (SPI) has been negotiated correctly on the two peers: This procedure describes how to confirm whether traffic flows across the tunnel: This section provides information you can use in order to troubleshoot your configuration. There is a global list of ISAKMP policies, each identified by sequence number. A certificate revocation list (CRL) is a list of revoked certicates that have been issued and subsequently revoked by a given CA. Two Sites (Site1 and Site-2) can communicate with each other by using ASA as gateway through a common Internet Service Provider Router (ISP_RTR7200). 2023 Cisco and/or its affiliates. command. Two Sites (Site1 and Site-2) can communicate with each other by using ASA as gateway through a common Internet Service Provider Router (ISP_RTR7200). You must assign a crypto map set to each interface through which IPsec traffic flows. 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). So using the commands mentioned above you can easily verify whether or not an IPSec tunnel is active, down, or still negotiating. 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. Web0. The expected output is to see both the inbound and outbound Security Parameter Index (SPI). ASA#show crypto isakmp sa detail | b [peer IP add] Check Phase 2 Tunnel. Establish a policy for the supported ISAKMP encryption, authentication Diffie-Hellman, lifetime, and key parameters. Data is transmitted securely using the IPSec SAs. You might have to use a drop down menu in the actual VPN page to select Site to Site VPN / L2L VPN show you can list the L2L VPN connections possibly active on the ASA. Typically, there must be no NAT performed on the VPN traffic. endpoint-dns-name is the DNS name of the endpoint of the tunnel interface. private subnet behind the strongSwan, expressed as network/netmask. 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. ASA#more system:running-config | b tunnel-group [peer IP add] Display Uptime, etc. verify the details for both Phases 1 and 2, together. Command to check IPSEC tunnel on ASA 5520, Customers Also Viewed These Support Documents, and try other forms of the connection with "show vpn-sessiondb ? This command show run crypto mapis e use to see the crypto map list of existing Ipsec vpn tunnel. In order to configurethe IKEv1 transform set, enter the crypto ipsec ikev1 transform-set command: A crypto map defines an IPSec policy to be negotiated in the IPSec SA and includes: You can then apply the crypto map to the interface: Here is the final configuration on the ASA: If the IOS router interfaces are not yet configured, then at least the LAN and WAN interfaces should be configured. VPNs. To see details for a particular tunnel, try: show vpn-sessiondb l2l. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! Phase 2 Verification. Thus, you see 'PFS (Y/N): N, DH group: none' until the first rekey. 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. If this is not done, then the the tunnel only gets negotiated as long as the ASA is the responder. The ASA debugs for tunnel negotiation are: The ASA debug for certificate authentication is: The router debugs for tunnel negotiation are: The router debugs for certificate authentication are: Edited the title. Check Phase 1 Tunnel. Details on that command usage are here. 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. If configured, it performs a multi-point check of the configuration and highlights any configuration errors and settings for the tunnel that would be negotiated. Or does your Crypto ACL have destination as "any"? An ACL for VPN traffic uses the source and destination IP addresses after Network Address Translation (NAT). Also,If you do not specify a value for a given policy parameter, the default value is applied. 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