Hi,

I have an Alcatel Speed Touch Pro 4-port ADSL modem. It is connected to
a permanent IP, always on. One port is connected to a computer whose
Ethernet address I have assigned as 10.0.0.1. I have another computer
connected as 10.0.0.4.

I can set up Apache on 10.0.0.1 to serve www pages on port 80. I can
view them from the 10.0.0.4 computer. Probing all the ports on 10.0.0.1
from 10.0.0.4 shows that they are all open (or indeed I can turn them
off with a firewall).

However, trying to type http://my.ip.address.here from the other side of
the Internet shows no web page. Probing the ports from the other side
shows them all closed. My ISP does not block any ports or in any other
way interfere with communications.

I am sure that this is because my ADSL modem is not 'letting through'
port 80 to 10.0.0.1. How do I configure it?

IP address table

Intf Address Netmask Type Transl Action
ADSL 1.2.3.4 (my IP) 255.255.255.0 Auto pat
eth0 10.0.0.138 255.0.0.0 Extra none
loop 127.0.0.1 255.0.0.0 Auto none

IP route table
Destination Source Gateway Intf Action
10.0.0.0/8 10.0.0.0/8 10.0.0.138 eth0
1.2.3.4/32 any 1.2.3.4 ADSL
255.255.255.255/32 any 10.0.0.138 eth0
10.0.0.138/32 any 10.0.0.138 eth0
127.0.0.1/32 any 127.0.0.1 loop
10.0.0.0/8 any 10.0.0.138 eth0
default 10.0.0.4/0 1.2.3.4 ADSL

Richard Cavell <richardcavell@mail.com> said

It's not supposed to (by default). It has firewalled your network and is
protecting you as it should.

You need to configure the alcatel to port forward all incoming traffic on
port 80 to your web server (10.0.0.1)

You can telnet to the modem and follow the instructions here:
http://www.ozcableguy.com/alcatel.html#portforwarding

Or you can download MirDesign (http://www.mirdesign.nl/) and do it all
through a GUI.


--

Kwyj.

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