Could anyone tell me how to collect client IP address with irule and save client ip to log ?
We have VIP which is for DNS and NTP service, protocol profile is UDP ( without Datagram LB enable) . i use below irule in a DNS VIP ( there is huge dns request to the vip ) , it worked for a few packets , then VIP stopped to response the dns request. where is wrong on the irule ? thanks for help in advance
when CLIENT_ACCEPTED { log -noname local0. "[virtual name] client [IP::client_addr]:[UDP::client_port] test-snat [IP::local_addr]:[UDP::local_port] server [IP::server_addr]:[UDP::server_port]" }
@xiaolche Do you see any logs showing errors for that iRule after it was applied? Typically if something is wrong with the iRule you will see a log generated on your F5 to show what is causing the issue. If this is a virtual that is used a significant amount you could be logging too often which might cause your logs to exponentially increase in size but not just disable the one virtual server I don't believe. The syntax of that logging message seems to be correct but that is a significant amount of information that is being logged rather than just the client IP.
As per the doc here the command [IP::server_addr] is not available in the CLIENT_ACCEPTED event. I wonder how the iRule can succeed in some cases. As @Paulius suggested you should see error messages if the iRule does contain errors. Can you check this?
Thank you both. I tried SERVER_CONNECTED first , then changed to CLIENT_ACCEPTED . So the log i saw maybe from server_connected. I will test again during maitenance window.
