Forum Discussion

Dennis_Schmidt's avatar
Dennis_Schmidt
Icon for Nimbostratus rankNimbostratus
Jun 29, 2021

SNAT based on mail domain in iRule

Hi there,   I want to collect the SMTP traffic and read the mail from domain. Based on this domain I want to do a SNAT.   The actual problem is that I can't read the TCP Payload.   I've ...
BIG-IP
devops
iRules
Nikoolayy1's avatar
Nikoolayy1
Icon for MVP rankMVP

You can see the links below with using either TCP::collect or a stream profile:

 

 

https://devcentral.f5.com/s/question/0D51T00006j2p4a/logging-smtp-traffic-info-via-hsl-to-remote-log-server

 

https://devcentral.f5.com/s/articles/smtp-proxy

 

 

https://devcentral.f5.com/s/question/0D51T00006j2p4Z/irule-for-smtp-passing-client-ip-addr-to-backend-mail-servers

Dennis_Schmidt's avatar
Dennis_Schmidt
Icon for Nimbostratus rankNimbostratus
Jul 01, 2021

Thanks for your answer.

I've tried with the TCP::collect.

The problem is that we don't get any SMTP Data. HTTP and HTTPS works fine. But the variable is always empty when SMTP traffic is send.

 

Any Idea why the variable is emtpy?

 

Thanks in advance.

  • Nikoolayy1's avatar
    Nikoolayy1
    Icon for MVP rankMVP
    Jul 01, 2021

    See the stream options in:

     

     

    https://devcentral.f5.com/s/question/0D71T000007a8ve/detail?s1oid=00D00000000hXqv&t=1625129872640&s1nid=0DB1T0000008Ony&emkind=chatterCommentNotification&s1uid=0051T000008eyBa&emtm=1625128385879&fromEmail=1&s1ext=0