iRule to disable APM not working as expected

If your request has any of the apm cookies, you may need to remove them from that request. I've had weird issues like that.

so, perhaps your iRule could do something like this:

when HTTP_REQUEST {    
    if {[string tolower [HTTP::header "User-Agent"]] contains "mac os x"  && [string tolower [HTTP::uri]] equals "/ews/exchange.asmx"} {
        log local0. "  Disable access for [HTTP::uri]"
        ACCESS::disable 
        HTTP::cookie remove "MRHSession"
        HTTP::cookie remove "LastMRH_Session"
    } else {
        log local0. "  [HTTP::uri]"
    }
}

May want to try with

when CLIENT_ACCEPTED {
    ACCESS::restrict_irule_events disable
}

May want to try with

when CLIENT_ACCEPTED {
    ACCESS::restrict_irule_events disable
}

which version of TMOS? I experienced having to build in a timer in a similar situation before 11.4.

are you sure there are any requests to other URI also?

when HTTP_REQUEST {
set u [HTTP::header "User-Agent"]
set uru [HTTP::uri]

log local0.notice "user agent: $u and uri: $uru"

    if {[string tolower [HTTP::header "User-Agent"]] contains "mac os x" } {
            ACCESS::disable 

    }   
}

when CLIENT_ACCEPTED {
    ACCESS::restrict_irule_events disable
}

Doesnt work and ltm logging shows only:

    Apr  7 10:29:29 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx
Apr  7 10:29:29 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx
Apr  7 10:29:30 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx
Apr  7 10:29:30 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx
Apr  7 10:29:30 loadbalancerhostname.something notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : user agent: Mac OS X/10.10.2 (14C1514); ExchangeWebServices/5.0 (213); Mail/8.2 (2070.6) and uri: /EWS/exchange.asmx

It should hit pool configured for the virtual server without creating access session. What do you expect in the logs?

It should hit pool configured for the virtual server without creating access session. What do you expect in the logs?

Tested the following iRule with curl

curl -k -L https://10.2.60.70

when HTTP_REQUEST {
  set u [HTTP::header "User-Agent"]
  set uru [HTTP::uri]
  log local0.notice "user agent: $u and uri: $uru"
  if {[string tolower [HTTP::header "User-Agent"]] contains "curl" } {
    ACCESS::disable 
  }   
}
when CLIENT_ACCEPTED {
    ACCESS::restrict_irule_events disable
}
when ACCESS_SESSION_STARTED {
   log local0.notice "Access session started"   
}

Apr 8 22:03:50 bigip6 notice tmm1[15943]: Rule /Common/accessDisable : user agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 OpenSSL/1.0.1j zlib/1.2.3 libidn/0.6.5 and uri: /

The logs doesn't have the Access session started message. Is there anything else done in your iRule?

hey thanks for taking the time to reproduce though my behaviour is different. I've added when ACCESS_SESSION_STARTED and I do see the session. Even when simply trying the [HTTP::host][HTTP::uri] directly from a web browser.

*Apr 8 16:08:17 lhr4-exlb-01 notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : hey I found a Mac so Disabling Acces policy...CLIENT IP 10.164.4.23 user agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:35.0) Gecko/20100101 Firefox/35.0 and uri: /ews/exchange.asmx

Apr 8 16:08:17 lhr4-exlb-01 notice tmm2[18680]: Rule /Common/OS-X_Kill_Preauth : Access session started for 10.164.4.23 and user agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:35.0) Gecko/20100101 Firefox/35.0*

irule: when HTTP_REQUEST { set u [HTTP::header "User-Agent"] set uru [HTTP::uri]

log local0.notice "user agent: $u and uri: $uru"

    if {[string tolower [HTTP::header "User-Agent"]] contains "mac os x" } {
            ACCESS::disable 
                          log local0.notice "hey I found a Mac so Disabling Acces policy...CLIENT IP [IP::client_addr] user agent: $u and uri: $uru"

    }   
}

when CLIENT_ACCEPTED {
    ACCESS::restrict_irule_events disable
}

when ACCESS_SESSION_STARTED {
   log local0.notice "Access session started for [IP::client_addr] and user agent: [HTTP::header "User-Agent"]"   
}