IPsec Troubleshooting: Understanding and Using debug
Cisco ASA 5500 Series Command Reference, 8 2 - show isakmp
The Source IP address indicates which endpoint initiated the IKE negotiation. Note that the VTI configuration demonstrated here is different from the older crypto map method used as an example in the IPsec cheat sheet. The show crypto isakmp sa command reveals that no IKE SAs exist yet. R1# show crypto isakmp sa IPv4 Crypto ISAKMP SA dst src state conn-id status IPv6 Crypto ISAKMP SA Step 1: Display IPsec security associations. I have an ASG 425 that I want to get connecting S2S IPsec VPN with Cisco 800 series routers at remote sites. I actually realized the "debug crypto isakmp" process showed the router going through each individual policy until finding a matching one right after making my last post. When an Internet Security Association and Key Management Protocol (ISAKMP) SA exists, it will most likely be in its quiescent state (QM_IDLE). R1# show crypto isakmp sa dst src state conn-id slot status Step 2: Display IPsec security associations. Command Modes The following table shows the modes in which you can enter the command: Command History Usage Guidelines The output from this command includes the following fields: Detail not specified. The following examples display a successful negotiating result between NSX Edge and a Cisco device. NSX Edge. From the NSX Edge command line interface (ipsec auto -status, part of show …. On Cisco however you got this crypto isakmp policy section where you specify SA lifetime as lifetime . When interesting traffic is sent, this command output will change. Same on the “set security-association lifetime seconds 3600” command inside the “crypto map map01 2 ipsec-isakmp” submenu.
Hi All New ASG user here, very impressed so far. Here is the detail of command used above, crypto ipsec transform-set MY-SET – Creates transform-set called MY-SET. R1#show crypto isakmp sa dst src state conn-id slot status 126.96.36.199 188.8.131.52 QM_IDLE 1 0 ACTIVE. ASA Commands. Contextual Help and Highlighting is supported for these ASA commands: packet-tracer. Displays the security association (SA) lifetime value configured for a particular crypto map. This command displays status information for active crypto sessions. To display the IKE runtime SA database, use the show isakmp sa command in global configuration mode or privileged EXEC mode. Here is the details of each commands used above, crypto isakmp policy 5 – This command creates ISAKMP policy number 5. If the state is MM_KEY_EXCH, it means either the configured pre-shared key is not correct or the peer IP addresses are different. Detail specified. detail Displays detailed output about the SA database. On the ASA, it shows no ipsec SA's for the peer, but it does show an isakmp sa still active. RouterA(config)# crypto isakmp key MYKEY hostname REMOTEHOST Remember, both the shared key, and the ISAKMP policy must match on both peers for a session to be established. 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. The configuration itself does not explicitly say "This phase 2 is associated with this phase 1" like Fortigate 60D from Fortinet for example. The timed lifetime causes the security association to time out after the specified number of seconds have passed. This command displays the settings used by current SAs. • show crytpto isakmp sa.
Show crypto isakmp sa This command will tell us the status of our negotiations, here are some of the common ISAKMP SA status’ The following four modes are found in IKE main mode. In the show crypto isakmp sa output, the state should always be QM_IDLE. The show crypto isakmp sa command shows the current IKE SAs. "Active" status means ISAKMP SA is in active state. The QM_IDLE mode indicates Quick Mode exchange (there is also Aggressive Mode exchange), meaning the IPSec SA remains authenticated and can be used for several quick mode exchanges. The problem I was looking into was seemingly bogus to me, I just needed a way to show it. Hello. Coming back to your initial question: "My concern was the output of "sh crypto isakmp sa" was always showing as "QM_idle". By default the router has 3600 seconds as lifetime for ipsec and 86400 seconds for IKE. The security association of isakmp should just be fine. …. You also have to set SA lifetime in crypto map IPsec-isakmp section like set security-association lifetime seconds . PIX-Firewall # The tables below show the various states that may be displayed in the output of the show crypto isakmp sa command. I have a cisco 1941 router and a cisco firewall on the ISP side. I did the config according to what the ISP have but still the status of connection is. One way is to display it with the specific peer ip. ASA#show crypto isakmp sa detail | b [peer IP add] Check Phase 2 Tunnel. Displays all existing IKE SAs, whether in an active or standby state. Displays the parameters for each IKE policy. Displays the default or a user-defined Internet Key. Router# show crypto isakmp sa dst src state conn-id slot 184.108.40.206 220.127.116.11 QM_IDLE 3 0 When troubleshooting, this is the first command that you should use to determine whether you have an IKE Phase 1 management connection to the remote peer. ISAKMP (IKE Phase 1) Negotiations States. The MM_WAIT_MSG state can be an excellent clue into why a tunnel is not forming. If your firewall is hanging at a specific state review this graph below to find where along the path the VPN is failing. If I clear the SA's on both sides of the connection, the VPN will come back up again. The following command “show run crypto ikev2” showing detailed information about IKE Policy. Even if we don’t configure certain parameters at initial configuration, Cisco ASA sets its default settings for dh group2, prf (sha) and SA lifetime (86400 seconds). A reader of last week's post Visualizing tunnels asked for an IPsec example, so here's a rundown continuing from the previous setup. Hi I am trying to setup a l2L FW on a ASA ver 8 and getting the message on the show isakmp sa detail for phase one. My Cisco ASA 5520 is able to initiate traffic to a remote peer (checkpoint R65) without issues and traffic flows in both directions without issue.When the Tunnel is initated by peer and my ASA is the responder the show crypto isakmp sa detail indicates the tunnel is up and in an active state but when I do a show crypto ipsec sa peer X.X.X.X the. This command displays information about the IPsec security association (SA) for all group members. • show crypto ipsec sa. This command displays current Internet Key Exchange (IKE) SAs. • show crypto session. Upon clearing the IPSec SA (using "clear crypto sa") new isakmp and ipsec sas were generated and the tunnel came back up. Use the command “ show crypto isakmp policy ” to display the parameters of the ISAKMP Policies. From the output above and below we can determine ISAKMP Policy 10 was used to complete IKE Phase 1 (note using DH group 15). You can create multiple policies, for example 7, 8, 9 with different configuration. Routers participating in Phase 1 negotiation tries to match a ISAKMP policy matching against the list of policies one by one. If any policy is matched, the IPSec negotiation moves to …. AS1-7304A#show crypto isakmp sa dst src state conn-id slot 18.104.22.168 22.214.171.124 QM_IDLE 2 0 126.96.36.199 188.8.131.52 QM_IDLE 1 0 After we can verify that Phase 1 SAs are established (by examining the output listed in Example 3-4), we are then ready to verify the establishment of IPsec SAs. The crypto isakmp policy and crypto ipsec transform-set values are exactly the same as the P1 and P2 proposals on the SSG. The crypto ipsec profile references the transform-set and is configured with a perfect-forward secrecy group of 14. After some assistance with this issue tho. If is saying anything else it could indicate the VPN is having …. If isakmp policy is matching, is the peer defined with the …. Note that I also configured the “hash sha” command inside the “crypto isakmp policy 10” submenu. However, this is not shown since it seems to be the default value. I found a thread on here mentioning that the wizard leaves out some rules that I need to make for the tunnel to …. To change the global timed lifetime, use the crypto ipsec security-association lifetime seconds form of the command. To change the global traffic-volume lifetime, use the crypto ipsec security-association lifetime ….