[clug] How to prevent port forwarding
kim.holburn at nicta.com.au
Sun Apr 23 02:37:28 GMT 2006
I remember there was a guy who had a method to tell how many hosts
were behind a firewall. I just forget the method but I think it
either was the guy who did all that weird stuff with indirect
traceroute (using TCP related packets as traceroute) I just can't
remember the names of any of it off-hand.
On 2006 Apr 22, at 11:09 PM, Christopher Zhang wrote:
> I am interested to find out if it is possible, if so, how, that
> some ISPs prevent 1 registered Internet user to distribute their
> Internet connection by running their computer as a gateway for
> other users to route through. The closest thing I can think of is
> TTL, since if other hosts are routed through the legitimate host,
> then their TTL will be at least be 1 less than if it were coming
> from the legitimate host, without any artificial changes. Is this a
> plausible way for ISPs ? Can anyone show me some iptables commands
> that the ISPs would do? and also how can I change my TTLs and so on.
> linux mailing list
> linux at lists.samba.org
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