Re: What Port Does Ping Use?

To: debian-user@lists.debian.org
Subject: Re: What Port Does Ping Use?
From: Lyno Sullivan <lls@freedomain.org>
Date: Thu, 11 Nov 1999 10:23:08 -0600
Message-id: <[🔎] 4.1.19991111101755.00932990@mail.winternet.com>
In-reply-to: <Pine.LNX.4.20.9911100843310.24027-100000@galactica.firetra il.com>
References: <[🔎] 19991109170121.A5826@luvmusl.net>

At 08:44 AM 11/10/99 -0800, aphro wrote:
>On Tue, 9 Nov 1999, Art Lemasters wrote:
>
>alemas > Which port number does ping use in Debian Linux?
>
>I do not believe ICMP uses ports, there are TYPES of ICMP though, the
>'ping' command uses ICMP type 8. at least thats what i have blocked in my
>firewall, it refuses pings but accepts traceroutes.

According to "Building Internet Firewalls"

ICMP,8 for incoming and outgoing ping requests
ICMP,0 for responses to ping request

tracert uses:
UDP ports >32768 (usually) for incming and outgoing probe
ICMP,11 for incoming and outgoing "TTL exceeded'
ICMP,3 for incoming and outgoing "servive unavailable"

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Follow-Ups:
- Re: What Port Does Ping Use?
  - From: Onno <ebbin200@tech.nhl.nl>

References:
- What Port Does Ping Use?
  - From: Art Lemasters <alemas@rmi.net>

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