Date: Fri, 21 Apr 2000 19:14:57 +0100 From: Adam Laurie <adam@algroup.co.uk> To: Ron Smith <ronnetron@hotmail.com> Cc: freebsd-security@FreeBSD.ORG Subject: Re: Using proxys with ipfw Message-ID: <39009AA1.4880F38F@algroup.co.uk> References: <20000421175830.78962.qmail@hotmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Ron Smith wrote:
>
> Hello All,
>
> I'm trying to determine if it's possible to implement smtp/pop, ftp, and www
> proxys with ipfw rules in place. If it is possible, which proxy software
> would be the best to use. I have a dual-homed gateway with ipfw rules in
> place. Everything works great , but I only have access to and from the
> Internet with NAT, at this point. I would like to add the ability to access
> a mail server behind a firewall from the outside world. I would also like to
> do the same for www and ftp services as well. Any pointers?
Assuming you are using natd, try 'man natd' - the interesting bit being:
-redirect_port proto targetIP:targetPORT [aliasIP:]aliasPORT [re-
moteIP[:remotePORT]]
Redirect incoming connections arriving to given port to
an-
other host and port. Proto is either tcp or udp,
targetIP is
the desired target IP number, targetPORT is the desired
tar-
get PORT number, aliasPORT is the requested PORT number
and
aliasIP is the aliasing address. RemoteIP and
remotePORT can
be used to specify the connection more accurately if
neces-
sary. For example, the argument
tcp inside1:telnet 6666
means that tcp packets destined for port 6666 on this
machine
will be sent to the telnet port on the inside1 machine.
cheers,
Adam
--
Adam Laurie Tel: +44 (181) 742 0755
A.L. Digital Ltd. Fax: +44 (181) 742 5995
Voysey House
Barley Mow Passage http://www.aldigital.co.uk
London W4 4GB mailto:adam@algroup.co.uk
UNITED KINGDOM PGP key on keyservers
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-security" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?39009AA1.4880F38F>