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. This synchronization allows events to be correlated when system logs are created and when other time-specific events occur. Edited for clarity. The router does this by default. In order to specify an IPSec peer in a crypto map entry, enter the, The transform sets that are acceptable for use with the protected traffic must be defined. This will also tell us the local and remote SPI, transform-set, DH group, & the tunnel mode for IPsec SA. If the router is configured to receive the address as the remote ID, the peer ID validation fails on the router. 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. Hopefully the above information By default the router has 3600 seconds as lifetime for ipsec and 86400 seconds for IKE. 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. 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. One way is to display it with the specific peer ip. On the other side, when the lifetime of the SA is over, the tunnel goes down? Hope this helps. If a site-site VPN is not establishing successfully, you can debug it. In order to verify whether IKEv1 Phase 2 is up on the IOS, enter theshow crypto ipsec sa command. Command show vpn-sessiondb license-summary, This command show vpn-sessiondb license-summary is use to see license details on ASA Firewall. This is the destination on the internet to which the router sends probes to determine the more system:running-config command use If you want to see your config as it is in memory, without encrypting and stuff like that you can use this command. View the Status of the Tunnels. Phase 2 Verification. show vpn-sessiondb license-summary. Customers Also Viewed These Support Documents. The identity NAT rule simply translates an address to the same address. ** Found in IKE phase I aggressive mode. 01-07-2014 On the ASA, if IKEv2 protocol debugs are enabled, these messages appear: In order to avoid this issue, use the no crypto ikev2 http-url cert command in order to disable this feature on the router when it peers with an ASA. Access control lists can be applied on a VTI interface to control traffic through VTI. How can i check this on the 5520 ASA ? In order to verify whether IKEv1 Phase 1 is up on the ASA, enter the show crypto isakmp sa command. 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. : 10.31.2.19/0, remote crypto endpt. am using cisco asa 5505 , and i created 3 site to site vpns to other companies i wanna now the our configruation is mismaching or completed , so how i know that both phase1 and phase 2 are completed or missing parameters . All of the devices used in this document started with a cleared (default) configuration. 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. Please try to use the following commands. How can I detect how long the IPSEC tunnel has been up on the router? This document can be used to verify the status of an IPSEC tunnel, validate tunnel monitoring, clear the tunnel, and restore the tunnel. * Found in IKE phase I main mode. verify the details for both Phases 1 and 2, together. View the Status of the Tunnels. Hi guys, I am curious how to check isakmp tunnel up time on router the way we can see on firewall. Download PDF. show vpn-sessiondb license-summary. To check if phase 2 ipsec tunnel is up: GUI: Navigate to Network->IPSec Tunnels GREEN indicates up RED indicates down. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! Remote ID validation is done automatically (determined by the connection type) and cannot be changed. In other words, have you configure the other ASA to tunnel all traffic through the L2L VPN? This document can be used to verify the status of an IPSEC tunnel, validate tunnel monitoring, clear the tunnel, and restore the tunnel. ASA#more system:running-config | b tunnel-group [peer IP add] Display Uptime, etc. 06:02 PM. 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. Tip: When a Cisco IOS software Certificate Authority (CA) server is used, it is common practice to configure the same device as the NTP server. Caution: On the ASA, you can set various debug levels; by default, level 1 is used. 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. If your network is live, make sure that you understand the potential impact of any command. 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. It also lists the packet counters which in your situation seem to indicate traffic is flowing in both directions. 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. 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. 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). show vpn-sessiondb l2l. I used the following "show" commands, "show crypto isakmp sa" and "sh crypto ipsec sa" and Here is an example: Note:You can configure multiple IKE policies on each peer that participates in IPSec. Note: On the router, a certificate map that is attached to the IKEv2 profile mustbe configured in order to recognize the DN. Therefore, if CRL validation is enabled on either peer, a proper CRL URL must be configured as well so the validity of the ID certificates can be verified. Note: For each ACL entry there is a separate inbound/outbound SA created, which might result in a long show crypto ipsec sa command output (dependent upon the number of ACE entries in the crypto ACL). show crypto isakmp sa. In order to configure the IKEv1 preshared key, enter the tunnel-group ipsec-attributes configuration mode: The ASA uses Access Control Lists (ACLs) in order to differentiate the traffic that should be protected with IPSec encryption from the traffic that does not require protection. How to check the status of the ipsec VPN tunnel? Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! 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. Before you verify whether the tunnel is up and that it passes the traffic, you must ensure that the 'traffic of interest' is sent towards either the ASA or the strongSwan server. 04-17-2009 07:07 AM. Configure tracker under the system block. I suppose that when I type the commandsh cry sess remote , detailed "uptime" means that the tunnel is established that period of time and there were no downs. You must assign a crypto map set to each interface through which IPsec traffic flows. Please try to use the following commands. 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. Set Up Tunnel Monitoring. You can naturally also use ASDM to check the Monitoring section and from there the VPN section. However, I wanted to know what was the appropriate "Sh" commands i coud use to confirm the same. Thus, you see 'PFS (Y/N): N, DH group: none' until the first rekey. Below commands is a filters to see the specific peer tunnel-gorup of vpn tunnel. 03:54 PM - edited show vpn-sessiondb detail l2l. 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. Note:If you do not specify a value for a given policy parameter, the default value is applied. I used the following "show" commands, "show crypto isakmp sa" and "sh crypto ipsec sa" and and it remained the same even when I shut down the WAN interafce of the router. failed: 0, #pkts not decompressed: 0, #pkts decompress failed: 0, local crypto endpt. 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. WebUse the following commands to verify the state of the VPN tunnel: show crypto isakmp sa should show a state of QM_IDLE. : 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. Also,If you do not specify a value for a given policy parameter, the default value is applied. For each ACL entry there is a separate inbound/outbound SA created, which can result in a long. This is the only command to check the uptime. 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. In order to go to internet both of the above networks have L2L tunnel from their ASA 5505 to ASA 5520. This feature is enabled on Cisco IOS software devices by default, so the cert req type 12 is used by Cisco IOS software. Can you please help me to understand this? In, this case level 127 provides sufficient details to troubleshoot. Phase 2 Verification. 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. show crypto isakmp sa. command. 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. Download PDF. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Phase 1 = "show crypto isakmp sa" or "show crypto ikev1 sa" or "show crypto ikev2 sa". 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. 1. * Found in IKE phase I main mode. 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 Find answers to your questions by entering keywords or phrases in the Search bar above. In this post, we are providing insight on Cisco ASA Firewall command which would help to troubleshoot IPsec vpn issue and how to gather relevant details aboutIPsec tunnel. show vpn-sessiondb license-summary. Set Up Tunnel Monitoring. Some of the command formats depend on your ASA software level. Compromise of the key pair used by a certicate. There is a global list of ISAKMP policies, each identified by sequence number. 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. 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. During IKE AUTH stage Internet Security Association and Key Management Protocol (ISAKMP) negotiations, the peers must identify themselves to each other. However, there is a difference in the way routers and ASAs select their local identity. In order to verify whether IKEv1 Phase 2 is up on the ASA, enter the show crypto ipsec sa command. This section describes how to complete the ASA and IOS router CLI configurations. So using the commands mentioned above you can easily verify whether or not an IPSec tunnel is active, down, or still negotiating. 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. 03-11-2019 The DH Group configured under the crypto map is used only during a rekey. ", Peak: Tells how many VPNs have been up at the most at the same time, Cumulative: Counts the total amount of connections that have been up on the device. The expected output is to see both the inbound and outbound Security Parameter Index (SPI). In other words it means how many times a VPN connection has been formed (even if you have configured only one) on the ASA since the last reboot or since the last reset of these statistics. - edited 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. Here is an example: In order to create or modify a crypto map entry and enter the crypto map configuration mode, enter the crypto map global configuration command. Phase 1 = "show crypto isakmp sa" or "show crypto ikev1 sa" or "show crypto ikev2 sa". Please rate helpful and mark correct answers. Details on that command usage are here. If the traffic passes through the tunnel, you must see the encaps/decaps counters increment. The tool is designed so that it accepts a show tech or show running-config command from either an ASA or IOS router. "My concern was the output of "sh crypto isakmp sa" was always showing as "QM_idle". For the scope of this post Router (Site1_RTR7200) is not used. 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. Or does your Crypto ACL have destination as "any"? will show the status of the tunnels ( command reference ). Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! 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. ASA-1 and ASA-2 are establishing IPSCE Tunnel. Phase 1 has successfully completed. Phase 2 = "show crypto ipsec sa". An encrypted tunnel is built between 68.187.2.212 and 212.25.140.19. Hope this helps. Note:An ACL for VPN traffic uses the source and destination IP addresses after Network Address Translation (NAT). All of the devices used in this document started with a cleared (default) configuration. 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. Ex. 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 define an IPSec transform set (an acceptable combination of security protocols and algorithms), enter the crypto ipsec transform-set command in global configuration mode. Note: The configuration that is described in this section is optional. PAN-OS Administrators Guide. PAN-OS Administrators Guide. 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. BGP Attributes Path Selection algorithm -BGP Attributes influence inbound and outbound traffic policy. WebHi, I need to identify the tunnel status is working perfectly from the logs of Router/ASA like from sh crypto isakmp sa , sh crypto ipsec sa, etc. All of the devices used in this document started with a cleared (default) configuration. ASA-1 and ASA-2 are establishing IPSCE Tunnel. Establish a policy for the supported ISAKMP encryption, authentication Diffie-Hellman, lifetime, and key parameters. Both peers authenticate each other with a Pre-shared-key (PSK). To check if phase 2 ipsec tunnel is up: GUI: Navigate to Network->IPSec Tunnels GREEN indicates up RED indicates down. Certificate lookup based on the HTTP URL avoids the fragmentation that results when large certificates are transferred. 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. Learn more about how Cisco is using Inclusive Language. An ACL for VPN traffic uses the source and destination IP addresses after Network Address Translation (NAT). Find answers to your questions by entering keywords or phrases in the Search bar above. I tried Monitoring-->VPN Statistics--> Session--->Filtered By---> IPSec Site-to-site. 07:52 AM In order to configure a preshared authentication key, enter the crypto isakmp key command in global configuration mode: Use the extended or named access list in order to specify the traffic that should be protected by encryption. If the traffic passes through the tunnel, you should see the encaps/decaps counters increment. Note:For each ACL entry there is a separate inbound/outbound SA created, which can result in a longshow crypto ipsec sacommand output (dependent upon the number of ACE entries in the crypto ACL). Secondly, check the NAT statements. If you change the debug level, the verbosity of the debugs canincrease. You can use your favorite editor to edit them. ASA#more system:running-config | b tunnel-group [peer IP add] Display Uptime, etc. 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. The first output shows the formed IPsec SAs for the L2L VPN connection. These are the peers with which an SA can be established. If the traffic passes through the tunnel, you must see the encaps/decaps counters increment. I am sure this would be a piece of cake for those acquinted with VPNs. This is not a bug, but is expected behavior.The difference between IKEv1 and IKEv2 is that, in IKEv2, the Child SAs are created as part of the AUTH exchange itself. The documentation set for this product strives to use bias-free language. 04-17-2009 Ensure that the NAT (or noNAT) statement is not being masked by any other NAT statement. ASA#show crypto isakmp sa detail | b [peer IP add] Check Phase 2 Tunnel. This section describes how to complete the ASA and strongSwan configurations. If your network is live, ensure that you understand the potential impact of any command. Lets look at the ASA configuration using show run crypto ikev2 command. 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. It examines the configuration and attempts to detect whether a crypto map based LAN-to-LAN IPSec tunnel is configured. access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.0.0 0.0.0.255. The expected output is to see both the inbound and outbound Security Parameter Index (SPI). Sessions: Active : Cumulative : Peak Concurrent : Inactive IPsec LAN-to-LAN : 1 : 3 : 2 Totals : 1 : 3. 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. VPNs. 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. 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. and try other forms of the connection with "show vpn-sessiondb ?" WebTo configure the IPSec VPN tunnel on Cisco ASA 55xx firewall running version 9.6: 1. Start / Stop / Status:$ sudo ipsec up , Get the Policies and States of the IPsec Tunnel:$ sudo ip xfrm state, Reload the secrets, while the service is running:$ sudo ipsec rereadsecrets, Check if traffic flows through the tunnel:$ sudo tcpdump esp. New here? Validation can be enabled or disabled on a per-tunnel-group basis with the peer-id-validate command: The difference in ID selection/validation causes two separate interoperability issues: When cert auth is used on the ASA, the ASA tries to validate the peer ID from the Subject Alternative Name (SAN) on the received certificate. The following command show run crypto ikev2 showing detailed information about IKE Policy. New here? ** Found in IKE phase I aggressive mode. Alternatively, you can make use of the commandshow vpn-sessiondbtoverify the details for both Phases 1 and 2, together. The information in this document uses this network setup: If the ASA interfaces are not configured, ensure that you configure at least the IP addresses, interface names, and security-levels: Note: 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. Next up we will look at debugging and troubleshooting IPSec VPNs. show vpn-sessiondb ra-ikev1-ipsec. Find answers to your questions by entering keywords or phrases in the Search bar above. 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. 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. BGP Attributes - Path Selection algorithm -BGP Attributes influence inbound and outbound traffic policy. All the formings could be from this same L2L VPN connection. If your network is live, ensure that you understand the potential impact of any command. In order to apply this, enter the crypto map interface configuration command: Here is the final IOS router CLI configuration: Before you verify whether the tunnel is up and that it passes the traffic, you must ensure that the traffic of interest is sent towards either the ASA or the IOS router. Note: An ACL for VPN traffic must be mirrored on both of the VPN peers. I am curious how to check isakmp tunnel up time on router the way we can see on firewall. Details on that command usage are here. 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. ASA-1 and ASA-2 are establishing IPSCE Tunnel. I need to confirm if the tunnel is building up between 5505 and 5520? 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. You should see a status of "mm active" for all active tunnels. This document describes how to configure a site-to-site (LAN-to-LAN) IPSec Internet Key Exchange Version 1 (IKEv1) tunnel via the CLI between a Cisco Adaptive Security Appliance (ASA) and a router that runs Cisco IOS software. Details 1. The ASA supports IPsec on all interfaces. Here IP address 10.x is of this ASA or remote site? By default the router has 3600 seconds as lifetime for ipsec and 86400 seconds for IKE. 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. Customers Also Viewed These Support Documents. Initiate VPN ike phase1 and phase2 SA manually. If you are looking at flushing the tunnel when the interface goes down then you have to enable keepalives. This document can be used to verify the status of an IPSEC tunnel, validate tunnel monitoring, clear the tunnel, and restore the tunnel.