Re: [SQU] Squid and listening UDP ports

From: Henrik Nordstrom <>
Date: Wed, 27 Sep 2000 23:22:09 +0200

Squid by defaults listens for ICP port 3130. This can be disabled by
setting icp_port to 0 in squid.conf, or restricted to a specific
interface by setting the udp_incoming_address.

Apart from this Squid also has a DNS resolver which opens a UDP port to
be able to receive responses to DNS lookups. This too should be
controlled by the udp_incoming_address option I think..

Henrik Nordstrom
Squid hacker
Randy Bey wrote:
> Greetings,
> I am using squid on our firewall instead of (or in accompaniment to)
> TIS toolkit.
> My concern is that squid listens on UDP ports (seemingly at random,
> sometimes even *!) on all interfaces.
> I do NOT want squid open for business on the outside interface.
> How do I shut down, or at least restrict to a particular interface,
> squid's UDP ports?
> Thanks in advance,
> Randy Bey
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Received on Wed Sep 27 2000 - 15:33:19 MDT

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