Hey DeepSeek, can you write iRules?
Revisiting my article from 2 years ago, I asked the same question to DeepSeek and gave it the same tasks that I gave ChatGPT back then.
Back in time...
Two years ago I asked ChatGPT whether it could write iRules.
My conclusion after giving several tasks to ChatGPT was, that it can help with simple tasks but it cannot write i...
Updated Feb 03, 2025
Version 2.0
Danielzi
Altocumulus
AltocumulusHi
Yes, you are right, but I don’t want to display the error code. I just want to show a different error page than the custom error page I currently have so that I can immediately notify the system administrators that it’s a server issue and not a blockage due to an illegal request.
Daniel_Wolf
MVP
MVPwhen HTTP_RESPONSE {
if { [HTTP::status] == 502 } { set static::illegal_status 1 }
}
when ASM_RESPONSE_VIOLATION {
if { ( [info exists static::illegal_status] ) } {
HTTP::header remove Content-Length
foreach {viol} [ASM::violation names] {
if {$viol eq "VIOLATION_HTTP_STATUS_IN_RESPONSE"} {
set response "<html><head><title>WAF Block</title></head><body><h1>Blocked because of Illegal HTTP status in response</h1></body></html>"
ASM::payload replace 0 [ASM::payload length] ""
ASM::payload replace 0 0 $response
}
}
}
}Remarks:
- Maybe add a condition, so that this iRule only get's executed from internal IP addresses.
- Maybe change [HTTP::status} to match a regex instead
- Maybe add a catch statement to check if info exists
- Add an unset to illegal_status for cleaner code
My overall comment to this iRule: It’s not a story the Jedi would tell you. It’s a Sith legend.