Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

UniFirst1_22521's avatar
UniFirst1_22521
Icon for Nimbostratus rankNimbostratus
Dec 10, 2015

iRules Blocking Traffic

I have an iRule that is suppose to only change an idle timer on certain traffic. However, when I enable it is seems to only allow the traffic defined the the iRule and no other connections can be mad...
application delivery
irules
stan_piron's avatar
stan_piron
Icon for Cumulonimbus rankCumulonimbus
Dec 10, 2015

You did not set the serverside_idle_timeout to 0 as default value...

so it raise a tcl error...

2 solutions:

when HTTP_REQUEST {
    set serverside_idle_timeout 0
    if { ([IP::addr [IP::client_addr] equals 172.17.101.60] or [IP::addr [IP::client_addr] equals 172.17.101.149]) and ([HTTP::host] equals "soaprod.corp.unifirst.com") }  { log local0. "original timeout: [IP::idle_timeout]"
        IP::idle_timeout 10800
        log local0. "updated timeout: [IP::idle_timeout]"
        set serverside_idle_timeout 1
    }
}
when SERVER_CONNECTED {
    log local0. "original timeout: [IP::idle_timeout]"
    if {$serverside_idle_timeout} {
        IP::idle_timeout 10800
        log local0. "updated timeout: [IP::idle_timeout]"
    }
}

or

when HTTP_REQUEST {
    if { ([IP::addr [IP::client_addr] equals 172.17.101.60] or [IP::addr [IP::client_addr] equals 172.17.101.149]) and ([HTTP::host] equals "soaprod.corp.unifirst.com") }  { log local0. "original timeout: [IP::idle_timeout]"
        IP::idle_timeout 10800
        log local0. "updated timeout: [IP::idle_timeout]"
        set serverside_idle_timeout 1
    }
}
when SERVER_CONNECTED {
    log local0. "original timeout: [IP::idle_timeout]"
    if {([info exists serverside_idle_timeout]) && ($serverside_idle_timeout)} {
        IP::idle_timeout 10800
        log local0. "updated timeout: [IP::idle_timeout]"
    }
}