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Forum Discussion

nullmodem_27781's avatar
nullmodem_27781
Icon for Nimbostratus rankNimbostratus
Jul 15, 2016

Triggered HTTP request to remote server from the LTM

Hi,   I am new to F5. I'd appreciate if you point me to the right direction for the solution to my problem I am trying to solve. F5 version that we use is 11.5.4.   My scenario is following -...
cloud
iRules
VernonWells's avatar
VernonWells
Icon for Employee rankEmployee
Jul 15, 2016

By "to external host/server", do you mean the selected load-balance target in https_pool, or a different external host? If it is the selected LB target, then it is simply a matter of changing the 

HTTP::method
(and possibly other factors as needed). If it is a separate host, then a Sideband connection is best. If this case, you will need to manually construct the HTTP Request message. I also presume you expect an answer. How you would treat the answer depends on what you wish to do with it. For Sideband connections, always use 
catch
blocks and check for errors. Also, always target a Virtual Server (setting the pool member to the external server) so that you have (much, much) greater control over the flow.

  • nullmodem_27781's avatar
    nullmodem_27781
    Icon for Nimbostratus rankNimbostratus
    Jul 15, 2016

    Hi Vernon, in my case external server/host is NOT the member of the pool. I'd like to understand pros/cons of having it in the pool. The slight complication here is that external host/server is not under my control. Also, can you please clarify, if I add it to the pool, do I still need Sideband?