Thanks Smaff, that was exactly what I was looking for. Owe you a beer :)

Cheers
Sascha

> -----Original Message-----
> From: Mailing list for discussion of Firewall-1
> [mailto:[EMAIL PROTECTED] On Behalf
> Of Andrew Smaff Matthews
> Sent: Tuesday, April 26, 2005 11:47 AM
> To: [email protected]
> Subject: Re: [FW-1] Does a stealth rule disable Client Authentication?
>
> On Tue, Apr 26, 2005 at 10:22:58AM +0200, Sascha Picchiantano wrote:
> [snip]
> > 1. - allow HTTO outbound, unauthenticated, source: web cache server
> > 2. - allow HTTP outbound, client auth, source: any
> >
> > Note that I have about 200 rules and that the two mentioned
> here are not
> > numer 1 and 2, it's just to illustrate how they are
> ordered. I want to
> > place a stealth rule on top of the rule base - where it belongs.
> >
> > If I get you right I place a new rule before the stealth rule that
> > allows HTTP, source local LAN, destination firewall. Would that be
> > enough to allow the clients to authenticate? Is the
> authentication done
> > over HTTP or does it use some other protocol? Which one?
> >
> 2 Things:
>         You don't have to put your client auth rules before
> your stealth
>         rule, but you *do* need a rule:
>                 Allow users to connect to firewall on:
>                 FW1_clntauth_telnet     (tcp/259)
>                 FW1_clntauth_http       (tcp/900)
>         Before your stealth rule.
>
> Client auth rules also are processed oddly - That is, the
> rulebase match
> actually continues until it hits a rule which would deny/reject the
> connection so you can actually do:
>
>         [EMAIL PROTECTED]       Internet        HTTP    ClientAuth
>         Webproxy        Internet        HTTP    Allow
>
> Because although the first rule matches for the webproxy, the
> search still
> continues and it realises that it doesn't actually need to
> authenticate the
> proxy.
>
> So you can create a rulebase that looks like:
>
>         firewall mgmt/Monitoring rules
>         Access to client auth services on firewall (tcp259/900)
>         "Stealth" Rule
>         Client Auth rules
>         General Outbound/Inbound rules
>         Usual block & logging set.
>
>                 Smaff
>
>
> --
> You happen to be here, now.
>
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