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. 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. 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. Configure IKE. 04:41 AM. if the tunnel is passing traffic the tunnel stays active and working? Set Up Tunnel Monitoring. However, I wanted to know what was the appropriate "Sh" commands i coud use to confirm the same. 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. If the traffic passes through the tunnel, you should see the encaps/decaps counters increment. This command Show vpn-sessiondb anyconnect command you can find both the username and the index number (established by the order of the client images) in the output of the show vpn-sessiondb anyconnect command. How to know Site to Site VPN up or Down st. Customers Also Viewed These Support Documents. Connection : 150.1.13.3Index : 3 IP Addr : 150.1.13.3Protocol : IKEv1 IPsecEncryption : 3DES Hashing : MD5Bytes Tx : 69400 Bytes Rx : 69400Login Time : 13:17:08 UTC Thu Dec 22 2016Duration : 0h:04m:29s. 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. Phase 1 = "show crypto isakmp sa" or "show crypto ikev1 sa" or "show crypto ikev2 sa". This command show crypto IPsec sa shows IPsec SAs built between peers. - edited If there are multiple VPN tunnels on the ASA, it is recommended to use conditional debugs (. Please try to use the following commands. Phase 1 has successfully completed. My concern was the output of "sh crypto isakmp sa" was always showing as "QM_idle". Thank you in advance. Then introduce interesting traffic and watch the output for details. endpoint-dns-name
is the DNS name of the endpoint of the tunnel interface. 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. Could you please list down the commands to verify the status and in-depth details of each command output ?. Where the log messages eventually end up depends on how syslog is configured on your system. 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. 04-17-2009 07:07 AM. In this setup, PC1 in LAN-A wants to communicate with PC2 in LAN-B. access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.0.0 0.0.0.255. show vpn-sessiondb license-summary. The expected output is to see both the inbound and outbound Security Parameter Index (SPI). 05-01-2012 And ASA-1 is verifying the operational of status of the Tunnel by VPNs. On Ubuntu, you would modify these two files with configuration parameters to be used in the IPsec tunnel. Access control lists can be applied on a VTI interface to control traffic through VTI. 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 document assumes you have configured IPsec tunnel on ASA. 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. Show Version command show the Device Uptime, software version, license details, Filename, hardware details etc. 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. I am curious how to check isakmp tunnel up time on router the way we can see on firewall. An encrypted tunnel is built between 68.187.2.212 and 212.25.140.19. Note:An ACL for VPN traffic uses the source and destination IP addresses after Network Address Translation (NAT). For more information on CRL, refer to the What Is a CRL section of the Public Key Infrastructure Configuration Guide, Cisco IOS XE Release 3S. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! The tool is designed so that it accepts a show tech or show running-config command from either an ASA or IOS router. If the router is configured to receive the address as the remote ID, the peer ID validation fails on the router. New here? This document can be used to verify the status of an IPSEC tunnel, validate tunnel monitoring, clear the tunnel, and restore the tunnel. 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The router does this by default. 08:26 PM, I have new setup where 2 different networks. View the Status of the Tunnels. PAN-OS Administrators Guide. 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. For more information on how to configure NTP, refer to Network Time Protocol: Best Practices White Paper. However, there is a difference in the way routers and ASAs select their local identity. 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. 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. Remember to turn off all debugging when you're done ("no debug all"). : 10.31.2.19/0, remote crypto endpt. WebUse the following commands to verify the state of the VPN tunnel: show crypto isakmp sa should show a state of QM_IDLE. Secondly, check the NAT statements. 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. Web0. Configure tracker under the system block. There is a global list of ISAKMP policies, each identified by sequence number. 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. 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. 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. "My concern was the output of "sh crypto isakmp sa" was always showing as "QM_idle". - edited Hopefully the above information 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. 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). Note:Refer to the Important Information on Debug Commands and IP Security Troubleshooting - Understanding and Using debug Commands Cisco documents before you use debug commands. 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 limit the debug outputs to include only the specified peer. Access control lists can be applied on a VTI interface to control traffic through VTI. Thank you in advance. One way is to display it with the specific peer ip. 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. 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. 11-01-2017 failed: 0, #pkts not decompressed: 0, #pkts decompress failed: 0, local crypto endpt. Do this with caution, especially in production environments. By default the router has 3600 seconds as lifetime for ipsec and 86400 seconds for IKE. You can for example have only one L2L VPN configured and when it comes up, goes down and comes up again it will already give the Cumulative value of 2. 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. 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 Details 1. Learn more about how Cisco is using Inclusive Language. and it remained the same even when I shut down the WAN interafce of the router. 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. If you shut down the WAN interface, the isakmp phase I and Phase II will remains until rekey is happening. 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. Remote ID validation is done automatically (determined by the connection type) and cannot be changed. Typically, this is the outside (or public) interface. 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 Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! 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 * Found in IKE phase I main mode. Ensure that the NAT (or noNAT) statement is not being masked by any other NAT statement. You can naturally also use ASDM to check the Monitoring section and from there the VPN section. You should see a status of "mm active" for all active tunnels. NIce article sir, do you know how to check the tunnel for interesting traffic in CISCO ASA,, senario there are existing tunnel and need to determine whether they are in use or not as there are no owner so eventually need to decommission them but before that analysis is required, From syslog server i can only see up and down of tunnel. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! Typically, there should be no NAT performed on the VPN traffic. Lets look at the ASA configuration using show run crypto ikev2 command. It's usually useful to narrow down the debug output first with "debug crypto condition peer " and then turn on debugging level 7 for Ipsec and isakmp: debug cry isa 7 (debug crypto ikev1 or ikev2 on 8.4(1) or later). - edited endpoint-dns-name is the DNS name of the endpoint of the tunnel interface. To see details for a particular tunnel, try: show vpn-sessiondb l2l. * Found in IKE phase I main mode. 07-27-2017 03:32 AM. However, I wanted to know what was the appropriate "Sh" commands i coud use to confirm the same. However, when you use certificate authentication, there are certain caveats to keep in mind. This section describes how to complete the ASA and strongSwan configurations. ASA#show crypto ipsec sa peer [peer IP add] Display the PSK. How can i check this on the 5520 ASA ? 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). The expected output is to see both the inbound and outbound Security Parameter Index (SPI). 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. While the clock can be set manually on each device, this is not very accurate and can be cumbersome. show vpn-sessiondb l2l. It also lists the packet counters which in your situation seem to indicate traffic is flowing in both directions. In order to exempt that traffic, you must create an identity NAT rule. Hi guys, I am curious how to check isakmp tunnel up time on router the way we can see on firewall. How can I detect how long the IPSEC tunnel has been up on the router? Is there any other command that I am missing?? private subnet behind the strongSwan, expressed as network/netmask. 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). 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. or not? 03-11-2019 How to check IPSEC VPN is up or not via cisco asdm for particular client, Customers Also Viewed These Support Documents. Data is transmitted securely using the IPSec SAs. and it remained the same even when I shut down the WAN interafce of the router. The ASA supports IPsec on all interfaces. So seems to me that your VPN is up and working. WebTo configure the IPSec VPN tunnel on Cisco ASA 55xx firewall running version 9.6: 1. Learn more about how Cisco is using Inclusive Language. 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. New here? Could you please list down the commands to verify the status and in-depth details of each command output ?. If the traffic passes through the tunnel, you must see the encaps/decaps counters increment. This document describes common Cisco ASA commands used to troubleshoot IPsec issue. Edited for clarity. 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. This command show crypto ipsec stats is use to Data Statistics of IPsec tunnels. In General show running-config command hide encrypted keys and parameters. Can you please help me to understand this? The tool is designed so that it accepts a show tech or show running-config command from either an ASA or IOS router. 05:17 AM However, I wanted to know what was the appropriate "Sh" commands i coud use to confirm the same. Need to understand what does cumulative and peak mean here? The router does this by default. The ASA supports IPsec on all interfaces. 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. You must assign a crypto map set to each interface through which IPsec traffic flows. With IKEv1, you see a different behavior because Child SA creation happens during Quick Mode, and the CREATE_CHILD_SA message has the provision tocarry the Key Exchange payload, which specifies the DH parameters to derive the new shared secret. This synchronization allows events to be correlated when system logs are created and when other time-specific events occur. Configure tracker under the system block. Check Phase 1 Tunnel. 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. This section describes how to complete the ASA and IOS router CLI configurations. ASA#show crypto ipsec sa peer [peer IP add] Display the PSK. In order to exempt that traffic, you must create an identity NAT rule. 04-17-2009 07:07 AM. New here? Hi guys, I am curious how to check isakmp tunnel up time on router the way we can see on firewall. 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. The documentation set for this product strives to use bias-free language. 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 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. 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. If there is some problems they are probably related to some other configurations on the ASAs. Customers Also Viewed These Support Documents. For each ACL entry there is a separate inbound/outbound SA created, which can result in a long. 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. The expected output is to see theMM_ACTIVEstate: In order to verify whether IKEv1 Phase 2 is up on the ASA, enter theshow crypto ipsec sacommand.
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