Re: Level3 routing issues?

[Valdis.Kletnieks () vt edu]

On Mon, 27 Jan 2003 16:00:51 EST, alex () yuriev com said:
> It is very easy. 
>
> Deny everything.
> Allow outbound port 80

Bzzt! You just let in an ActiveX exploit. Or Javascript. Or....

> Allow mail server to 25

Bzzt! You just let in a new Outlook exploit.

> If you need AIM, allow AIM from workstations to oscar.aol.com and whatever
> the name of the other mahine.

Bzzt! You just let in an AIM exploit.  That's assuming that you even *know*
what the current name of the other machine is this time around - this
laptop has had 6 IP addresses in as many hours.  Remember there's a reason
why 'talk george () his-box whatever dom' isn't as common anymore....

> I am failing to see a problem.

Well.. other than you let a box that wants to talk on the VPN get outside
access to 3 things that are *KNOWN* vectors of malware which could then
attack the VPN side of things, no, there's no problem here.

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