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jlb4350's avatar
jlb4350
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Jul 19, 2022
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Help tweaking my iRule

Hello all. I have an oubound virtual server that allows all traffic and protocols to any address, it's a wildcard outbound. I'm wanting to use an iRule to block outbound connections to Russia using data referenced in a data group. I created the following data group and iRule, but it ended up blocking everything when I attached it to my wildcard outbound VS. Are there any iRule gurus could can help me tweak this? Any help is much appreciated!

Data group:

iRule:

  • The iRule is slightly wrong in that it is trying to pull out a value of RU and then matching the IP address to the value which would never happen.  I would use the framework set in the support article and do something like this:

    when SERVER_CONNECTED {
        set ipaddr [IP::remote_addr]
        set fromCountry [whereis $ipaddr country]
        if { [class match $fromCountry equals GeoIPOutboundBlockRussia] } {
             log local0. "Attacker IP [IP::client_addr]"  ;#  This can be removed/commented out if not required
             drop
        }
    }

     

6 Replies

    • jlb4350's avatar
      jlb4350
      Icon for Cirrus rankCirrus

      Interesting. So I should just put RU in the string field and nothing in the value field, and that will be my string record, like this:


      How about the iRule, does that part look alright?

      Thank you for your reply and help!

      • David_Larsen's avatar
        David_Larsen
        Icon for Employee rankEmployee

        The iRule is slightly wrong in that it is trying to pull out a value of RU and then matching the IP address to the value which would never happen.  I would use the framework set in the support article and do something like this:

        when SERVER_CONNECTED {
            set ipaddr [IP::remote_addr]
            set fromCountry [whereis $ipaddr country]
            if { [class match $fromCountry equals GeoIPOutboundBlockRussia] } {
                 log local0. "Attacker IP [IP::client_addr]"  ;#  This can be removed/commented out if not required
                 drop
            }
        }

         

  • Sorry for the late reply, I've been traveling.

    I ended up piecing together a few iRules that I found to come up with this and it works perfectly. I may tweak it in the future, but this is working. It involves the countries to block access to in a data group and the iRule to reference that group:

  • Perfect, I'll give that a try and see what happens tonight. I'll report back, thank you again for your help!