Snort mailing list archives

Re: port 443 in HTTP port variable list


From: waldo kitty <wkitty42 () windstream net>
Date: Fri, 10 Jul 2015 12:41:38 -0400

On 07/10/2015 11:36 AM, Harley H wrote:
Have many of you added port 443 to the HTTP port variable? I see a lot of
malware using plaintext HTTP over port 443 and am wondering if it's regular
practice to add port 443 to the list.

if you are seeing plain text traffic over port 443, then someone or something is 
co-opting the fact that you are allowing that port inbound and/or outbound 
access... P2P, some music/video streaming apps and malware are coded to 
specifically get around network administrative restrictions...

as each network is different, if you are seeing plain text traffic on 443, then 
yes, i would add it to your "portvar HTTP_PORTS" list as well as the list of 
ports the http preprocessor uses... not doing so is letting that traffic pass 
without inspection and you could be allowing compromised data out or (other) 
malware in...

just like with having sex, an unprotected access point is a point of possible 
infiltration, infestation and compromise ;)

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