[Owasp-waf] Egress filtering with ESAPI WAF

Guruvayurappan R guruvayurappan.r at tcs.com
Mon Jun 24 16:43:19 UTC 2013


I am trying to implement WAF for achieving egress filtering. During then, 
I found that temp files are getting created. I would like to know more on 
why these are being created. 

- Why is there a need to create temporary files for each output response 
and if there is a way to turn it OFF? I saw someone had reported in a blog 
that he had issue with files not getting closed in some flows and thereby 
causing too many open file descriptors.
- During testing, I found that the files created are of just 0 bytes in 
size. But, still wouldn't it be an issue, if used in large applications, 
where thousands of requests per second is possible.
- Are there any performance benchmarks available with the Egress filtering 
implementation of ESAPI WAF? I would like to know if there are any 
performance concerns with any specific egress filtering rules this WAF is 

Appreciate your responses much! Thanks.

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