Forum Discussion
Josh_Hildebran1
Nimbostratus
NimbostratusSMTP EHLO response
I'd like to make an iRule that looks for a "EHLO " command and simply responds w/ a particular error message.
I've tried to piece together something, but I've come up short, apparently. Can anyon...
Try this:
rule FixUP-SMTP {
when SERVER_CONNECTED {
peer { TCP::collect }
}
when CLIENT_DATA {
if { [TCP::payload] starts_with "EHLO" } {
TCP::respond "500 5.3.3 Unrecognized command\r\n"
set len [TCP::payload length]
TCP::payload replace 0 $len ""
TCP::release
} else {
TCP::release
TCP::collect
}
}
}You might want to disable the rule after it has fired the first time, or after you see the DATA method in order to prevent parsing payload. Up to you, but you get the general idea.
