How do I congiure to deny funny url accesses?

From: Seiji Tokunaga <>
Date: Fri, 31 Jan 1997 18:19:47 +0900 (JST)

Hi! Need help on configuration.

        acl allowed_addr src
        acl for_our_eyes_only url_regex ^http://foo\.co\.jp\.*

        http_access allow for_our_eyes_only allowed_addr
        http_access deny for_our_eyes_only all

I set the above to deny hosts other than "allowed_addr"
from accessing URL

When forbidden hosts tries to access URL "",
They get denied.
When they try "http://\" they get their pages..
Placing a backslash "\" allowes to bypass the rules.

What can I do to prevent it?
Are there any other character that allows such things?

I am using squid version:
Squid Cache: Version 1.0.18

Note: I do not belong the ML.
      Please cc:
Seiji Tokunaga (
NEC Informatec Systems, NSI Div., Network Integration Dept.
  TEL: 044-856-8481 FAX: 044-856-2273
  NEC TEL: 272-5607 FAX: 272-5649 MAIL:272-5600
Received on Fri Jan 31 1997 - 01:30:35 MST

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