FW: [ILUG] ISDN dial on demand and firewall

[Martin]

mandrake 8.2 is faily easy to setup for isdn dod. When installing mandrake
it will detect your isdn card, install isdn4linux and ask you for your isp's
number, your own number(so you can use both lines) ,etc.
There are then only an isdnctrl.conf in /etc/isdn, an options file in
/etc/ppp and you chap/pap secrets files to setup.

The best solution for the firewall, if you ask me, would be iptables. This
will allow you to block stuff like windows periodically trying to connect in
order to do dns lookups,broadcasts, etc. It also gives you the option to
setup ip masquerading which you will want.

Martin

-----Original Message-----
From: ilug-admin at linux.ie [mailto:ilug-admin at linux.ie]On Behalf Of Derek
Hardiman
Sent: 05 June 2002 11:28
To: ilug at linux.ie
Subject: [ILUG] ISDN dial on demand and firewall


Can anyone suggest a good distro or a particular configuration to solve this
problem. I have a couple of PCs in the house and an ISDN line. Currently the
ISDN is connected to a W2K machine. I also have a laptop with 802.11b. What
I'd like to do is take an old machine (Pentium 133, 32MB, 2GB disk) and use
it as a gateway that will dial on demand via ISDN, provide DHCP to the other
machines nad provide wireless access for the laptop. Firewalling would be
nice too. I'd also like the Linux box to act as a forwarding email server so
that if I read email on the laptop I can still get at the same mail from my
desktop. The laptop and desktop are both running Windows. There is one last
machine that is running Linux and is being used as a J2EE server.

Any help would be greatly appreciated.

Derek


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