Forum Discussion
VictorC
Nimbostratus
NimbostratusHTTP VS: Only allow specific client IP but open specific /uri for all.
Hi,
Currently I have an iRule on a HTTP VS that discards requests if the client IP is not in the allow class. Now I have to add an extra requirement to allow 'all' if a specific /uri is given. Here's my current iRule (thanks to previous posts found in the forum).
class myallowedclients {
host 111.22.33.1
host 111.22.33.2
}
rule restrict-rule {
when CLIENT_ACCEPTED {
if { [matchclass [IP::client_addr] equals $::myallowedclients] }{
Do nothing...irule will complete and request will be sent to the pool based on virtual server definition
} else {
discard }
}
}
I may have to use this requirement for multiple HTTP VS with the same client allow list, but different pools so it'd be great if I can use one rule for all.
Thanks in advance.
Victor
VictorCThanks guys, it works great now. Appreciate your time.
Victor- VictorCI had to keep the "Set allowed_ip 0" because otherwise I get this error in the log
Jun 22 07:25:26 tmm tmm[1085]: 01220001:3: TCL error: Rule restrict-rule - can't read "allowed_ip": no such variable while executing "if {$allowed_ip}{ Exit this event in this rule return }"
All else is working great. Thanks again. - VictorCI had to keep the "Set allowed_ip 0" because otherwise I get this error in the log
Jun 22 07:25:26 tmm tmm[1085]: 01220001:3: TCL error: Rule restrict-rule - can't read "allowed_ip": no such variable while executing "if {$allowed_ip}{ Exit this event in this rule return }"
All else is working great. Thanks again. - JRahm
Admin
if you use info exists allowed_ip you can remove the set statement. - Yeah, it would end up looking like
when HTTP_REQUEST {
Skip the URI checking if the client IP is allowed
if {[info exists allowed_ip]} {
Exit this event in this rule
return
}
...
This performs the same check but uses a function to do so (the info command) rather than just innately evaluating the variable which, if it doesn't exist, will throw an error like the one you're seeing.
Colin
