topic Re: Just skype in General Topics

Just skype

Retired Member — Thu, 04 Apr 2013 10:59:06 GMT

Hi,

An environment like LAN - PAN - Proxy - Router - Internet

is there a way to block everything but allow just skype.No web browsing, nothing allowed except skype.

I tried some rules but skype couldn't connect.

Thanks.

Re: Just skype

filipe — Thu, 04 Apr 2013 13:06:32 GMT

Hello,

Try a rule allowing only skype and ssl, destinated to Any, with url filtering blocking everything but allowing *.skype.com in the whitelist, followed by a rule Deny Any/Any.

Keep an eye on the monitor tab and try to use skype and see if you can identify what application and destination is being blocked from your test workstation and fine tune the rule.

If even then it doesn't work, let us know.

Best regards.

Re: Just skype

ericgearhart — Thu, 04 Apr 2013 15:47:17 GMT

If you allow SSL and URL filtering but you don't intercept/decrypt SSL, won't that not work? Or will PA try to match based on the certificate?

Also make sure you allow skype-probe too in your App column (or I guess PANOS 5 handles app dependencies automagically, so it won't be an issue). Doesn't hurt to have it explicitly defined though

Re: Just skype

Retired Member — Thu, 04 Apr 2013 16:19:39 GMT

I second skype-probe suggestion. Try skype-probe explicitly. At very least it'll show you some traffic.

Re: Just skype

Retired Member — Thu, 04 Apr 2013 17:40:04 GMT

I tried that but couldn't connect.

I allowed dns, skype ,skype probe, ssl, and some applications but no web browsing

I looked for traffic select deny...

we saw http proxy deny....

Re: Just skype

ericgearhart — Thu, 04 Apr 2013 17:45:56 GMT

So the proxy's denying the traffic? Is the proxy transparent (ex. is it using WCCP?) Or do you explicitly define the proxy on your clients? The Skype client might need to be told about the proxy server in that case.

Re: Just skype

istankus — Thu, 13 Jun 2013 06:00:09 GMT

Allow web browsing via your proxy in one rule and add separate rule which allows skype and skype-probe without proxy (I mean destination is any IP on the outside). Skype also supports configuration for proxy server, so this can also be used as a solution.