how can i block Gtalk/Gmail using ASA

Unanswered Question
Aug 12th, 2010

I am using Cisco ASA 5520, i need to block gtalk/gmail. We are using WebSense for filtering the URL but still gmail / gtalk doen't block as gmail can be open using https.

If i block port 443 for the inside interface it gets blocked, but that we can't do as there are some other https website which we require to be open.

Can you please suggest or guide on the same



I have this problem too.
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Nagaraja Thanthry Thu, 08/12/2010 - 15:25


HTTP inspection cannot support blocking of secure webpages (HTTPS). However,

if you use any URL filtering solutions like WebSense, then you can block

certain webpages. Alternatively, if you are using internal DNS server, then

you can black hole the traffic by setting DNS records for those specific


Hope this helps.




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