Custom App for CRL downloads

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Custom App for CRL downloads

L1 Bithead

Hi,

I am trying to create a custom app that will match CRL downloads, to allow them without any questions ask. Shouldn't be too hard : on a previous web security gateway, I would match a pattern like the following: "http://([^/:])*crl.*\.crl"

When translated to an app signature, I already know I am looking for two patterns, on the following contexts:

  • http-req-host-header
  • http-req-uri-path

Now, my issue is that my pattern are incredibly simple. I am not able to reach the 7 bytes limit with this. One other way would be to match the MIME type in the RSP header I guess... application/pkix-crl or application/x-pkcs7-crl are fine. The issue is with the occasional misconfigured root CAs that still reports text/plain.

So....  Is there anything I can do with this to simply allow CRLs without creating a huge custom category?

Thank you.

20 REPLIES 20

L0 Member

shouldn't be all "/" escaped?

.*((application/pkix-crl)|(application/x-pkcs7-crl)|(text/plain)|(application/octet-stream)).*

 

like this

.*((application\/pkix-crl)|(application\/x-pkcs7-crl)|(text\/plain)|(application\/octet-stream)).*

 

Just guessing because it was not working for me.

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