Forum Discussion
SMTP Sensitivity Tag
What we are looking at doing is make LB desision based on the SMTP Sensitivity Tag. If the Tag is marked Confidential then we will send the client to PGP mail gateways, other wise the BigIp will send ...
Yes, the iRule would need to respond and proxy the SMTP server. The real challenge with SMTP is the option negotation that occurs after the initial HELO/EHLO handshake. The trick is to a) have a list of options that the servers support so the iRule can proxy an appropriate response; and b) remember the options negotiated so that when the connection is made to the server, they can be replayed.
Another approach might be to go ahead and load balance to a server, save all the client messages and then LB::detach when you discover the Confidential tag and then replay the initial exchange to the new server.
Good luck and hopefully you'll share your result with us...
