Masquerading problems

Masquerading problems

[David Gaston Rodriguez]

Hi!, i am new in the list, i am from argentina, this is mi problem:
I have a small LAN with a server doing masquerading, I used the kernel 2.2.20 and
did not have any problem, now i decided to use the kernel 2.4.18, i set iptables 
to make the masquerading, but now there are web pages which i can enter from 
workstations, like for example www.mixmail.com or www.yahoo.com, and from the server
i can enter to this pages. I using 2 interfaces, eth0: external, eth1: internal, the
external interface is connect to ADSL Modem (PPPoE).
Some idea on as could be mi problem?
Thanks!!


-- 

---------------------------------
DAVID GASTÓN RODRIGUEZ
Linux Tucumán
Nick: [[D4V|D]]
---------------------------------
Email:  davidgr@interlap.com.ar
        david_80gr@hotmail.com
ICQ: 81492566
MSN Messenger: david_80gr
---------------------------------

Re: Masquerading problems

[R. Sterenborg]

----- Original Message -----
From: "David Gaston Rodriguez" <davidgr@interlap.com.ar>

> to make the masquerading, but now there are web pages which i can enter
from
> workstations, like for example www.mixmail.com or www.yahoo.com, and from
the server
> i can enter to this pages. I using 2 interfaces, eth0: external, eth1:
internal, the

So you can access pages from workstations. And also from the server.
What *is* the problem ?

Rob

RE: Masquerading problems

[George Vieira]

All you really need is to POSTROUTE the workstations..

With PPPoE do this..

INTSN="192.168.1.0/24"
IPTABLES=/sbin/iptables
EXTDEV="`adsl-status | grep "Link encap"  | awk {'print $1'}"
$IPTABLES -A POSTROUTING -o $EXTDEV -t nat -s $INTSN -d $ANYWHERE -j
MASQUERADE



There is a /proc switch which you should turn on for dynamic IPs.. forgot
the path.. someone must know it.. argh..


-----Original Message-----
From: David Gaston Rodriguez [mailto:davidgr@interlap.com.ar]
Sent: Wednesday, 03 July 2002 3:08 PM
To: netfilter@lists.samba.org
Subject: Masquerading problems


Hi!, i am new in the list, i am from argentina, this is mi problem:
I have a small LAN with a server doing masquerading, I used the kernel
2.2.20 and
did not have any problem, now i decided to use the kernel 2.4.18, i set
iptables 
to make the masquerading, but now there are web pages which i can enter from

workstations, like for example www.mixmail.com or www.yahoo.com, and from
the server
i can enter to this pages. I using 2 interfaces, eth0: external, eth1:
internal, the
external interface is connect to ADSL Modem (PPPoE).
Some idea on as could be mi problem?
Thanks!!


-- 

---------------------------------
DAVID GASTÓN RODRIGUEZ
Linux Tucumán
Nick: [[D4V|D]]
---------------------------------
Email:  davidgr@interlap.com.ar
        david_80gr@hotmail.com
ICQ: 81492566
MSN Messenger: david_80gr
---------------------------------

Re: Masquerading problems

[Antony Stone]

On Wednesday 03 July 2002 10:28 am, George Vieira wrote:

> All you really need is to POSTROUTE the workstations..
>
> With PPPoE do this..
>
> INTSN="192.168.1.0/24"
> IPTABLES=/sbin/iptables
> EXTDEV="`adsl-status | grep "Link encap"  | awk {'print $1'}"
> $IPTABLES -A POSTROUTING -o $EXTDEV -t nat -s $INTSN -d $ANYWHERE -j
> MASQUERADE

Surely if this were David's problem, his workstations wouldn't be able to 
access any external servers, whereas his problem report seems to suggest that 
it is only certain websites which he cannot contact (and therefore others 
which he can ?)

Maybe this is my error in interpretation, and the solution is as simple as 
you suggest...

 

Antony.

> -----Original Message-----
> From: David Gaston Rodriguez [mailto:davidgr@interlap.com.ar]
> Sent: Wednesday, 03 July 2002 3:08 PM
> To: netfilter@lists.samba.org
> Subject: Masquerading problems
>
>
> Hi!, i am new in the list, i am from argentina, this is mi problem:
> I have a small LAN with a server doing masquerading, I used the kernel
> 2.2.20 and
> did not have any problem, now i decided to use the kernel 2.4.18, i set
> iptables
> to make the masquerading, but now there are web pages which i can enter
> from
>
> workstations, like for example www.mixmail.com or www.yahoo.com, and from
> the server
> i can enter to this pages. I using 2 interfaces, eth0: external, eth1:
> internal, the
> external interface is connect to ADSL Modem (PPPoE).
> Some idea on as could be mi problem?
> Thanks!!