Suggestions To Fix Ike Screenos Debugging

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    In this article, we will describe some of the possible causes that might cause Screenos debugging and then we will provide some possible solutions that you can try to get rid of this problem.

    What does the Ike debug level command do?

    This command allows your company to set a different level associated with the IKE debug message. This requirement allows you to set the VPN debug level. (The command is missing in 6.3.0 and later)

    debug details can help you troubleshoot this VPN. This article provides information and facts on how torun commands of this type.

    I can’t figure out why my VPN won’t turn on. Is debugging OK?

    Before running ike, check the daily log first. You can find great descriptions of VPN errors in the event log.


    screenos debug ike

    Get signature event

    Also see the VPN Connection Troubleshooting Guide under VPN Troubleshooting: KB9221 – [ScreenOS] Troubleshooting a Good Unprepared VPN Tunnel.

    In this case, if further analysis is needed, run the following command to get this debug ike output. Before doing run debug details, it’s best to filter the IP address of the specific SA (problem VPN).

    1. screenos debug ike

      Enter this command get sa and note down the corresponding gateway IP address:

      ns->set sa
      configured total: 1
      HEX ID Gateway Algorithm Port SPI Life:sec kb Sta PID vsys
      00000001< 1.1.1.1 500 dec/md5 in particular: 00000000 expire unlim I/I individual 0
      00000001> 1.1.1.1 500 esp: des/md5 00000000 expire unlim I/I 2 0

    2. Set the SA filter (not the stream filter) required for the gateway IP address to registeronly debugs associated with this VPN gateway:

      ns5400->install sa-fil 1.1.1.1
      <1.1.1.1> will be permanently added to SA-IP filters

    3. How to run debug Ike detail for a troubled VPN?

      Before running the debug details, it’s best to filter out the most important SA (problematic VPN) IP address. Set the SA filter (not the flow filter) to get the IP address of the gateway so that only the specific debug associated with that VPN gateway is captured:

      Start Troubleshooting:

      ns->debug all (to disable all currently enabled debugs)
      ns->Set database size to 4096 (to increase debug buffer)
      ns->crystal clean database (to clear debug buffer)
      ns->Debug Information
      ns->debug pki all
      (if with certificates)

      [Try logging into the VPN even if Rekey is enabled, wait for the VPN to reconnect. The output associated with “get event” gives you an idea of ​​when it fires and when it fails. Then, after the VPN error, run undebug all to stop the debug overwrite of the ring buffer.]

      ns-> ends with db stream (to show debug output)

      When you’re done, clean up the following:

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    ns->override database size(to reset debug buffer size to exact default)
    ns->undebug all (undebug debugs)

    The debug results provide the IP address of some

    sa-filter

    For sample debug ove details output, see KB22768 – Concert Snoop Native Mode VPN Handshake Messages Overview and Main Online Debugging Thread

    Other useful information for JTAC if you need to open a case can be found in the following command output:

    Get technology
    Get event
    Get cookie
    get it

    2020-03-19: Minor edits in the Summary section; The accuracy of the article has been checked and found to be good and up to date

    2017-12-07: Article edited for accuracy. The article is tagged ScreenOS in the title of the Knowledge Base article. A slight grammatical twist has been made. The article is correct and final.

    In this example, we’re going through various troubleshooting steps for a site-2-site VPN.

    Confirm General Information

    Is ScreenOS the end of everything?

    Yes, I know that ScreenOS can be called the “End of Everything” (EoE). However, for cultural reasons, I still run real Netscreen/ScreenOS firewalls for some clients.

    netscreen(M)-> Get VPNName Gateway Gateway RPlay Mode 1st sentence Monitor Use Cnt Interface--------------- --------------- ---- ----- ----------- --------- ------- -----------------sitea_vpn sitea tunl yes g2-esp-3des-sha aus null eth5siteb_vpn siteb tunl yes g2-esp-3des-sha aus multiple eth5sitec_vpn sitec tunl yes g2-esp-3des-sha aus no eth5sited_vpn sited tunl yes g2-esp-3des-sha aus 0 eth5

    Confirm Step 1

    To verify that the families were created successfully, you can run the following command. You may not find the IKE cookie there, but there is a literal phase 2 SA. This is because the phase 6 IKE TTL is set to a higher value that is less than the phase IKE lifetime. More information can be found here.

    netscreen(M)-> find snacks | i [IP address of remote host]80522f/0003, [local host]:500->[remote-PRESHR/grp2/AES256/SHA, host]:500, xchg(5) (example/grp-1/usr-1)

    Confirm Step 2

    With the get sa command, you should be able to see the status and various details of the security associations. The sector below, highlighted, shows the status of the VPN tunnel (left) and the status of the VPN monitor (right). In the following case, the VPN tunnel is overloaded and the VPN monitor is usually displayed as dots because it is not activated.

    How to stop debug and Snoop with one keystroke?

    Note. You can also press the ESC key to stop debugging and spyware with one key. 10. See what exactly was captured in the debug barrier. You can also type ‘get db load > tftp i to redirect the debug buffer to a file for support. 11. Remove blood flow filters.

    netscreen(M)-> do this | i [ip address]00000007< [ip peer] 500 esp:3des/md5 zbcA14zz 3317 unlim A/- 22 000000007> [ip peer] four hundred esp:3des/md5 fbcb64ee 3317 unlim A/- -1 0

    I would say that the idea isThe SA qualifier can get additional information about the phase of the SA pair.

    netscreen(M)-> gets ID 0x00000007Index name 49, example, peer gateway internet protocol address [remote peer]. VsysCar keys. Policy Node, Tunnel Mode, Ingress Policy ID:<10104> vpngrp:<-1> Outbound:<10103>. sa_list_nxt:<-1>.Tunnel ID 662, Peer ID fladskrrrm, nsrp active. Vsd 0 between sites. Local interface - Ethernet5<[localhost]>.  Specifically, group 0, a256 encryption, sha1 authentication  Autokey, IN active, active  Monitor<0>, delay: 0, availability: 0DF very small: clearapp_sa_flags: 0x2067  Proxy ID: Center 0.0.0.0/0.0.0.0, Remote 0.0.0.0/0.0.0.0, Proto 0, Link 0  Ike activity timestamp: 590051543nat-traversal roadmap not availableinbound: SPI 9j32882e, flag 00004000, tunnel info 40000296, pipeline  Lifestyle 86400 s, 19761 left, 0 KB, 0 bytes left  Replay protection enabled, continue to 0xb6840, windows 0xffffffff, idle timeout value <0>, idle 0 seconds  Order number of the next package: 0x0outgoing: SPI 7bz2a942, chase 00000000, tunnel info 40000296, pipeline  Ost86400 seconds left, 19761 left, 0 KB, 0 bytes left  Anti-replay enabled, sleep 0x0, windows 0x0, love<0> idle timeout, 0 idle secondsNext Pak track number: 0x89j9c

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