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Allwyn_Mascaren's avatar
Allwyn_Mascaren
Icon for Cirrus rankCirrus
Dec 23, 2018

Getting a 503 only when using f5

HI I am using an oracle application and everytime when going through f5 and generating a report I get an not authorized for the resource error msg. However when going without f5 the application ...
BIG-IP
security
John_Huttley's avatar
John_Huttley
Icon for Employee rankEmployee
Dec 25, 2018

Hi, 503 is application gateway. Probably not related.

 

I've had cases with BI tools that download java to the client.

 

The java app then establishes a secondary connection that is not associated with the browser. See if java is running..

 

To debug this you will need to capture the traffic.

 

Set up SSLKEYLOGFILE

 

https://jimshaver.net/2015/02/11/decrypting-tls-browser-traffic-with-wireshark-the-easy-way/

 

Setup wireshark to capture port 443, clear your cache and a get a good capture of working and non working cases. Unlike a pure httpwatch or HAR capture, you will see if there is unexpected traffic that might be coming from a side-loaded application. (though if its https, you can't decrypt it) --John