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Re: Masquerading problem with ADSL
- To: Eyal Harpaz <eyal5(at-nospam)isdn.net.il>
- Subject: Re: Masquerading problem with ADSL
- From: Sagi Bashari <sagi(at-nospam)boom.org.il>
- Date: Fri, 13 Apr 2001 08:09:30 -0500 (CDT)
- cc: <linux-il(at-nospam)cs.huji.ac.il>
- In-Reply-To: <Pine.LNX.4.21.0104131556250.13666-100000@localhost.localdomain>
- Sender: linux-il-bounce(at-nospam)cs.huji.ac.il
Hi Eyal,
Set the MTU on the windows box to 1452. the Adsl HOWTO will guide you how
to do that.
Sagi
On Fri, 13 Apr 2001, Eyal Harpaz wrote:
>
>
> Hello,
>
> I have successfully connected to the ISP using the ADSL-HOWTO on iglu, but
> I am unable to masquerade any HTTP (specifically HTTP, everything else
> works OK) connections.
>
> I am using a 2.4.3 vanilla kernel, with iptables.
> I issue
>
> [root@RedGhost /root]# iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -i
> ppp0 -j MASQUERADE
> [root@RedGhost /root]# echo 1 > /proc/sys/net/ipv4/ip_forward
>
> After which all my client machines ( Win2k and win98 ) can successfully
> ping to the internet, use irc, ftp and everything EXCEPT http.
> When I try to use HTTP I can see the information leave (via tcpdump) and I
> can see that there is a reply from the http server, but it never reaches
> the client machine.
>
> On the linux box itself every network service works, so I think that this
> is a masquerading problem.
>
> I get the exact same behaviour using ipchains on a 2.2.16 kernel.
> The distribution I am using is Redhat 7.0.
>
> The one thing that really bothers me is that when I telnet to a HTTP
> server, say yahoo, on port 80, and I issue an INCORRECT request, I get the
> error on the client machine correctly.
> If I telnet on port 80 and issue a correct request then it waits about 2-3
> minutes, after which I get all the information.
>
>
> Any ideas, anybody?????
>
> Thanks,
>
> Eyal
>
>
>
>
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