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st0n3_87491's avatar
st0n3_87491
Icon for Nimbostratus rankNimbostratus
Aug 13, 2009

Persistence based on IMAP-User

Hi there, as topic say I would like to have a persistence to a node based on his IMAP-Userlogin. I managed to find out this using a stream Profile and wrote this iRule so far: whe...
application delivery
dev
devops
iRules
Nat_Thirasuttakorn's avatar
Nat_Thirasuttakorn
Icon for Employee rankEmployee
Aug 27, 2009
you may try this...

this irule uses a lot of shortcut. it assumes that client just makes tcp connection and send capability command. For simplicity, the capability command is tripped off and is not forwarded to server. 

    
 when CLIENT_ACCEPTED {  
     TCP::respond "* BIG-IMAP ready\r\n"  
     set state "capability"  
      assume client will send capability as next command  
     TCP::collect  
 }  
 when CLIENT_DATA {  
     switch $state {   
         "capability" {  
             TCP::respond "* CAPABILITY IMAP4 IMAP4rev1 IDLE LITERAL+ LOGIN-REFERRALS MAILBOX-REFERRALS NAMESPACE AUTH=NTLM\r\na0000 OK CAPABILITY completed.\r\n"  
             set state "login"  
              assume client will send login as next command  
             TCP::payload replace 0 [TCP::payload length] ""  
             TCP::collect  
         }  
         "login" {  
              find username and make load balancing decision here 
             log local0.alert "[TCP::payload]" 
             TCP::release  
         }  
     }  
 }

you may have to change capability message (the specific line below) to match your server. Dont forget to put \r\n (or CRLF) as necessary.

TCP::respond "* CAPABILITY .... "

Nat