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Forum Discussion

hilledegraaf_29's avatar
hilledegraaf_29
Icon for Nimbostratus rankNimbostratus
Sep 28, 2018

iRules "Operation not supported" log errors

We want to insert a HTTP header with the following name "client-ip" in a HTTP Request which has the value of the Client Source IP address. But we also want to check if this header exist, and if it do...
application delivery
Big-IP iRules
iRules
LTM
PeteWhite's avatar
PeteWhite
Icon for Employee rankEmployee
Sep 28, 2018

From the HTTP::header insert help page:

 

"If this command is executed after issuing the HTTP::redirect or HTTP::respond command, the F5 will become confused, generate an "Operation Not Supported" TCL error and reset the connection."

 

Do you have another iRule assigned to the virtual server? If so, take care with the order and possibly use priority to ensure that this runs first.

 

You should also check whether the header is already present using HTTP::header exists and then use replace to replace it. Basically, add some error prevention code around the insert.