ISP -> ADSL Modem -> Router: Modem Webpage acess?

**njs** · 13-03-2006, 20:55

Hi

I think the topic name is self explainable, I have the following configuration:

ISP -> ADSL Billion 711 CE Bridged Mode -> WL-500g PPPoE -> Private Network

The management IP of the modem is: 192.168.2.254 and my private network is 192.168.1.0. But I cannot access to the web management page.

I tried to setup an IPv4 192.168.2.1 IP on eth1 at the router, and I started to ping the modem, although I'm not able to do so using any 192.168.1.X address.

My thought was, routes: so I set up a route in the modem so that all traffic to network 192.168.1.0 would go to the LAN interface. It didn't work.

My guess: NAT alied to PPPoE is screwing everything, sending all traffic to the ppp0 interface. I cannot confirm it since I don't have tcpdump or so in the asus.

Does anyone have a clue ?

Firmware in use: 1.9.2.7-6b

Thanks for any help
Nuno

**njs** · 22-03-2006, 23:44

Ok...

I found it out.

Here's the solution:

Code:

ifconfig eth1 192.168.2.1 netmask 255.255.255.0
iptables -t nat -I POSTROUTING -o eth1 -d 192.168.2.0/24 -j SNAT --to-source 192.168.2.1

Adapt this code at your needs..

However there's still one problem, whenever PPPoE is restarted the iptables rule has to be set again, is there any way to load it with the other rules when restarting the PPPoE connection?

Nuno

**LeperKing** · 17-07-2006, 18:16

What ip address did you enter to access the modem?

Has anyone else done this?

LK

**LeperKing** · 19-07-2006, 09:14

Has anyone got any info on this?

LK

**njs** · 21-07-2006, 13:07

My modem is configured with IP: 192.168.2.254 .

Here http://oleg.wl500g.info/#tips you'll find what you need to have the firewall rules to be properly setup whenever PPPoE restarts.

Hope this helps.

Nuno

**LeperKing** · 21-07-2006, 13:38

Thanks njs!

I'll try that tonight.

Cheers,
LK.

**LeperKing** · 21-07-2006, 20:32

Ok set my modems address to 192.168.2.254 for sake of simplicity.

My router is 192.168.1.1

So far,
192.168.2.254 times out.
192.168.2.1 goes to the router homepage

192.168.1.1 goes again to the router homepage

Any ideas?

Thanks,
LK.

**njs** · 22-07-2006, 14:39

Can you post here your interfaces configuration ? (ifconfig) and iptables -L -t nat ?

Regards,
Nuno

**LeperKing** · 22-07-2006, 14:49

/usr/local/sbin/post-firewall

Code:

#!/bin/sh
ifconfig eth1 192.168.2.1 netmask 255.255.255.0
iptables -t nat -I POSTROUTING -o eth1 -d 192.168.2.0/24 -j SNAT --to-source 192.168.2.1

**njs** · 22-07-2006, 15:50

er.. sorry.

Please post here the output of the ifconfig and iptables -L -t nat

What is your router model ?

Nuno

**LeperKing** · 22-07-2006, 19:36

Sorry Nuno my mistake:

Code:

[root@wl500gx root]$ ifconfig
br0       Link encap:Ethernet  HWaddr 00:11:D8:97:DE:EF
          inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::211:d8ff:fe97:deef/10 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:30412 errors:0 dropped:0 overruns:0 frame:0
          TX packets:86745 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:5178543 (4.9 MiB)  TX bytes:52190146 (49.7 MiB)

eth0      Link encap:Ethernet  HWaddr 00:11:D8:97:DE:EF
          inet6 addr: fe80::211:d8ff:fe97:deef/10 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:52903 errors:0 dropped:0 overruns:0 frame:0
          TX packets:131513 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:33357101 (31.8 MiB)  TX bytes:27153288 (25.8 MiB)
          Interrupt:4 Base address:0x1000

eth1      Link encap:Ethernet  HWaddr 00:11:D8:97:DE:EF
          inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::211:d8ff:fe97:deef/10 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:30368 errors:0 dropped:0 overruns:0 frame:4572
          TX packets:128371 errors:106 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:5600645 (5.3 MiB)  TX bytes:56411815 (53.7 MiB)
          Interrupt:2 Base address:0x4000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MULTICAST  MTU:16436  Metric:1
          RX packets:99264 errors:0 dropped:0 overruns:0 frame:0
          TX packets:99264 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:8515880 (8.1 MiB)  TX bytes:8515880 (8.1 MiB)

ppp0      Link encap:Point-Point Protocol
          inet addr:194.125.97.239  P-t-P:193.95.142.243  Mask:255.255.255.255
          UP POINTOPOINT RUNNING MULTICAST  MTU:1492  Metric:1
          RX packets:22030 errors:0 dropped:0 overruns:0 frame:0
          TX packets:15205 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:19886995 (18.9 MiB)  TX bytes:3188731 (3.0 MiB)

vlan0     Link encap:Ethernet  HWaddr 00:11:D8:97:DE:EF
          inet6 addr: fe80::211:d8ff:fe97:deef/10 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:88578 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:20969935 (19.9 MiB)

vlan1     Link encap:Ethernet  HWaddr 00:11:D8:97:DE:EF
          inet6 addr: fe80::211:d8ff:fe97:deef/10 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:52903 errors:0 dropped:0 overruns:0 frame:0
          TX packets:42932 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:32404847 (30.9 MiB)  TX bytes:6183135 (5.8 MiB)

Code:

[root@wl500gx root]$ iptables -L -t nat
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination
VSERVER    all  --  anywhere             194.125.97.239
NETMAP     udp  --  anywhere             194.125.97.239     udp spt:6112 192.168.1.0/24

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination
SNAT       all  --  anywhere             192.168.2.0/24     to:192.168.2.1
NETMAP     udp  --  192.168.1.0/24       anywhere           udp dpt:6112 194.125.97.239/32
MASQUERADE  all  -- !194.125.97.239       anywhere
MASQUERADE  all  --  192.168.1.0/24       192.168.1.0/24

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Chain VSERVER (1 references)
target     prot opt source               destination
DNAT       tcp  --  anywhere             anywhere           tcp dpt:53062 to:192.168.1.186:53062
DNAT       udp  --  anywhere             anywhere           udp dpt:3074 to:192.168.1.2:3074

I have a wl500gx Deluxe with 1.9.2.7-7e

LK

**njs** · 22-07-2006, 23:30

Maybe it doesn't work because that's a wl-500g deluxe and the interfaces configuration are slightly different.

I think that the script will have to be modified in order to reflect the interfaces architecture of wl-500g deluxe.

Sorry but I don't know how to help.

Nuno

**cfao** · 16-08-2006, 20:48

For it to work on the wl500 deluxe change eth1 to vlan1 on those two lines and voila...

Tried & tested

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