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Forum Discussion

Jeremy_Bridges_'s avatar
Jeremy_Bridges_
Icon for Nimbostratus rankNimbostratus
Aug 21, 2009

Custom TCP Monitor

I am looking to do some custom TCP monitoring with a custom application that we need to monitor with the F5. Essentially, the application's thread handling logic will hang unless a specific set of se...
management
monitoring
Jeremy_Bridges_'s avatar
Jeremy_Bridges_
Icon for Nimbostratus rankNimbostratus
Aug 24, 2009
I think I found an excellent way to create this monitor. I found that if we call these apps by passing all of the pieces at once, the application works fine. After digging a bit, I was able to find ways to embed all of the special characters that are needed for a request to the application into the Send field in a custom TCP monitor:

 

 

https://support.f5.com/kb/en-us/solutions/public/4000/100/sol4186.html

 

 

However, I ran into a wall that I don't know if I can scale. The send string includes ASCII null chars. These should be able to be escaped as:

 

 

\x00

 

 

However, it seems the BIG-IP web interface doesn't allow these chars. For, I got an error when trying to add the custom monitor (see attachment). Is there some other way to get these into the system?