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Date:      Wed, 19 Mar 2003 15:28:49 +0100
From:      mackan <markus@markus.pp.se>
To:        ai1@mtaonline.net
Cc:        Bill Moran <wmoran@potentialtech.com>, freebsd-questions <questions@FreeBSD.ORG>
Subject:   Re: where packets are dropped in route
Message-ID:  <200303191428.h2JESnNi096580@vega.unicks.net>
In-Reply-To: <3E7866CB.5060104@potentialtech.com>
References:  <200303191011.h2JABJ0B038650@en26.ai1.anchorage.mtaonline.net> <3E7866CB.5060104@potentialtech.com>

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Quoting Bill Moran <wmoran@potentialtech.com>:

> ai1@mtaonline.net wrote:
> > i can't SSH to my gateway from machines elsewhere
> > on the internet, but i can ssh to it on a local net.
[...]
> > my current ISP claims not to be blocking any traffic.
> > i think he is wrong, and would like to identify
> > exactly what machine is dropping the packets
> > destined for port 22 on my gateway.
[...]
> traceroute will allow you to specify a port/proto instead of
> using ICMP.
> Other tools might be helpful as well.  Use nmap (in ports) to
> see if packets are being denied or simply dropped.> -- 

Do you have shell access to another host on the internet? Try nmap
(as already suggested) from that host and scan your own machine.

Maybe your ISP is blocking port 22 after all. nmap will tell you.

-mackan

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