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123notit_142916's avatar
123notit_142916
Icon for Nimbostratus rankNimbostratus
Jan 27, 2015

F5 redirect for SSLv3 connections only

I have the following irule in place -

 

when HTTP_REQUEST { set cipherSuite [SSL::cipher version] if { $cipherSuite equals "SSLv3" } { log local0. "SSL3 connection detected from [IP::client_addr] for [virtual name]" HTTP::redirect https://sslv3help.com page TCP::close } } [/code]

 

This should redirect anyone connecting via SSLv3 to the sslv3help page, and also log the ip that is using sslv3 (so I can see which clients are still making the IE browser changes).

 

No matter what SSL protocols I set IE to use however, it never redirects to the help page.

 

application delivery
devops
iRules
security

4 Replies

  • Michael_Jenkins's avatar
    Michael_Jenkins
    Icon for Cirrostratus rankCirrostratus
    Jan 27, 2015

    If you add a line to log the ciphersuite and test with IE, do you see the SSLv3 coming through or a different log message?

    when HTTP_REQUEST { 
    set cipherSuite [SSL::cipher version] 
    log local0. "Cipher Suite: $cipherSuite"

    if { $cipherSuite equals "SSLv3" } { 
        log local0. "SSL3 connection detected from [IP::client_addr] for [virtual name]" 
        HTTP::redirect "https://sslv3help.com" 
        TCP::close 
    } 
}
  • 123notit_142916's avatar
    123notit_142916
    Icon for Nimbostratus rankNimbostratus
    Jan 27, 2015

    Tue Jan 27 08:50:15 CST 2015errLB06mcpd[5116]1070151Rule [/Common/test_rule] error: line 1: [wrong args] [when HTTP_REQUEST { set cipherSuite [SSL::cipher version] if { $cipherSuite equals "SSLv3" } { log local0. "SSL3 connection detected from [IP::client_addr] for [virtual name]" HTTP::redirect https://sslv3help.com TCP::close } } [/code]]

     

    Tue Jan 27 08:50:40 CST 2015errLB06mcpd[5116]1070151Rule [/Common/test_rule] error: line 2: [wrong args] [set cipherSuite [SSL::cipher version] if { $cipherSuite equals "SSLv3" } { log local0. "SSL3 connection detected from [IP::client_addr] for [virtual name]" HTTP::redirect https://sslv3help.com TCP::close } ]

     

    Tue Jan 27 08:50:43 CST 2015errLB06mcpd[5116]1070151Rule [/Common/test_rule] error: line 2: [wrong args] [set cipherSuite [SSL::cipher version] if { $cipherSuite equals "SSLv3" } { log local0. "SSL3 connection detected from [IP::client_addr] for [virtual name]" HTTP::redirect https://sslv3help.com/browsers.html TCP::close } ]

     

  • 123notit_142916's avatar
    123notit_142916
    Icon for Nimbostratus rankNimbostratus
    Feb 18, 2015

    Wanted to answer this (sorry it took so long) but this was resolved when I noticed that the SSL profile attached to the Virtual Cert – specifically does not allow SSLv3 traffic due to the fact that its parent profile has a ‘No SSLv3’ option enabled on it, which is being inherited to the child ssl profile.

     

    So best to create a separate SSL profile when testing this to ensure you don't end up wasting time trying to figure this out, like me.

     

    Thanks.