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Deny https access from PIX 515

Posted on 2006-10-25
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Last Modified: 2010-05-18
Hello Everyone,

I am trying to deny access to the following website:

https://tools.razorthought.com/cgi-bin/surfsafe/nph-proxy.cgi/010110A/687474702s636s6q6q656r742r6q7973706163652r636s6q2s696r6465782r63666q3s66757365616374696s6r3q757365722r76696577436s6q6q656r747326667269656r6449443q3833323330363239264q79546s6o656r3q363231653

using my PIX 515 Firewall, can anyone help me?  It would be best if I could stop all workstations in the district from accessing HTTPS sites, I'll just create an access list giving my Admins static ips access to HTTPS.
 
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Question by:eptexascrazy
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5 Comments
 
LVL 7

Expert Comment

by:instillmotion
ID: 17807827
access-lists are linear so start by permit:
access-list outbound permit tcp host youradminsstaticip any eq https

access-list outbound deny tcp any any eq https
Don't forget:
access-list outbound permit ip any any
If you don't put this you will deny everything outbound by virtue of doing the https deny because by default the assumption after that is deny all

Apply access-list:
access-group outbound in interface inside
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Author Comment

by:eptexascrazy
ID: 17808071
I can still get through to the website I am trying to block and when I applied the access-group outbound in interface inside, it blocked everything (including our homepage) but did not block the website I WANT to block.

What is it with this website?
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LVL 7

Expert Comment

by:instillmotion
ID: 17809141
Please post your config. My guess is it's the order the access-list is being applied. Don't forget access-lists are linear, starting from top to bottom.
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Author Comment

by:eptexascrazy
ID: 17814355
access-list outbound permit tcp 10.1.4.0 255.255.255.0 any eq https
access-list outbound permit tcp 10.2.4.0 255.255.255.0 any eq https
access-list outbound permit tcp 10.3.4.0 255.255.255.0 any eq https
access-list outbound permit tcp 10.6.4.0 255.255.255.0 any eq https
access-list outbound permit tcp 10.4.4.0 255.255.255.0 any eq https
access-list outbound deny tcp any any eq https

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Accepted Solution

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instillmotion earned 125 total points
ID: 17814513
if you didn't put at the following at bottom of the access-list that explains why everything got blocked (as I sated in the previous post)
"access-list outbound permit ip any any"

in your inbound access-list:

access-list outbound permit tcp 10.1.4.0 255.255.255.0 any eq https
access-list outbound permit tcp 10.2.4.0 255.255.255.0 any eq https
access-list outbound permit tcp 10.3.4.0 255.255.255.0 any eq https
access-list outbound permit tcp 10.6.4.0 255.255.255.0 any eq https
access-list outbound permit tcp 10.4.4.0 255.255.255.0 any eq https

You are allowing all clients on those subnets to use https. When you say it didn't block the website you want to block, from what ip were you accessing the website from? if it's part of that block, access is allowed.
are those 5 class C blocks your admin ips?


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