Revision as of 18:25, 28 Ocak 2012

Technicolor TG582N

Documents

These files are from December 2011, supplied by Technicolor.

File:Technicolor CPE Firewall.pdf Firewall Config Application note - giving details on how the firewall can be configured via CLI
File:TG582n CLI Guide v1.0 public.pdf for 8.4.4 firmware
File:IPv6 AppNote v4.0 public.pdf contains IPv6 related commands found in newer firmware
Datasheet and brochure on the Technicolor website

Firmware Versions

Version 8.4.4.1 is the factory default (as of November 2011) Version 8.4.7.0 is IPv6 enabled, and is upgraded at AAISP when configured by AAISP.

AAISP usually configure the router on their TR-069 server and run the upgrade to 8.4.7.0 before shipping, but some customers have been shipped trial-routers with the 8.4.4.1...

Upgrading from 8.4.4.1 is arranged by AAISP via the TR-069 CPE WAN Management protocol. This involves installing the "isp.def" as needed to persuade the router to connect to AAISP's TR-069 servers and asking AAISP to request the upgrade. Twice it has happened that the upgrade only partially completed, and it has been recessary to FTP to the router, re-uploading the isp.def, before it 'reports in' to AAISP correctly.

Other Settings & Config info

Admin Settings

When configured by A&A, the default username from the LAN side is: Administrator and from the WAN: aaisp. The password will be printed on the card on the base of the router, and also seen on the control pages.

Setting up Routed Config

Use the configuration-wizard (Firefox seems to work best) and choose ADSL(Expert). TODO: Describe where to find this.

Adding Static-routes

 ip rtlist
 ip rtadd dst=network/mask gateway=gatewayip
 ip saveall

Really disabling the firewall

From a customer: While going mad with a tg582n tonight. I discovered they try to do stateful firewalling even when the firewall is disabled in the web interface. This breaks where you want to failover to 3G. I guess it would also break if you had 2 ADSL lines.

Completely disabling the firewall seems to be necessary to allow IPv6 connections from WAN side to network, as even when IPv4 firewall is 'off', the IPv6 still seems to be firewalled.

To fix, put in CLI:

firewall config state disabled 
firewall config icmpchecks disabled
firewall config udpchecks disabled 
firewall config tcpchecks none

Disabling the firewall also allows access to the routers' internal services from the WAN-side, although there seems to be some default logic disallowing these to function e.g. "User 'Administrator' is disallowed to login from wan to telnet" etc.

Disabling the firewall also exposes the DNS forwarder (whose software seems to have NO restrictions on the client-IP used!).

Getting rid of Open DNS Forwarder

Once the firewall is 'actually' disabled, there is now the problem that the DNS Forwarding function is now open-access to the world! This is bad because small spoofed-source UDP-packets can be sent to the router, resulting it a *large* UDP reply of the attackers' choice, a bandwidth-multiplication attack.

This can be resolved by:-

(a) On any machines with a static-IP-configuration, set their nameservers to go directly to AAISP (217.169.20.20 217.169.20.21) and do not try to use the routers' LAN IP address.

(b) Telnet into the Router, logon to Administrator, then enter commands:-

dhcp server config state=disabled
dhcp server pool config name LAN_custom localdns=disabled
dhcp server pool config name LAN_custom primdns=217.169.20.20
dhcp server pool config name LAN_custom secdns=217.169.20.21
dhcp server config state=enabled
dns server config state=disabled
saveall

What this does, is tells the DHCPv4 server to directly give out the addresses of AAISP's recursive DNS servers and not its, own, and then completely disable the integral DNS forwarder (notice the DHCP server can only be reconfigured while disabled).

NB: You can check if Legacy IP addresses are running an Open Recursive server using the website:- http://security.zensupport.co.uk/recdns/

Problems connection to PPTP Servers

One customer has reported problems connecting to PPTP VPN servers in either direction through a tg582n with the 8.4.7.0 firmware.

Technicolor have stated that this may be due to the Application Layer Gateway system intercepting PPTP packets even when the firewall is disabled and is a deliberate feature, but that the feature can be disabled by entering the following commands in the CLI:

connection applist
connection unbind application PPTP port 1723
saveall

However the same customer has reported that this solution has not actually fixed the problem and that the PPTP entry is still visible when running the "connection applist" command even after the unbind command has been successfully run.

(Another customer has been able to reproduce tho issue, unable to connect to swissvpn.net, etc. but does work using the alternative OpenWRT ADSL router instead).

Changing PPP Password, via telnet CLI

The command should be:

ppp ifconfig intf=Internet user=x@a password=secret status=enabled

Other routers that we've used in the past:

Billion BiPAC 7800N

Factory IP: 192.168.1.254 Factory User/Pass: admin/admin

Firmware

Latest Firmware is from Billion As of October 2011 the version we ship is 1.06d

We have a copy of 1.06d here: media:UKBillion7800NV6_106d.zip

Another useful Billion page on spaldwick.com

Comtrend

Info here: *Comtrend

Thomson

We've tested a TG789vn router (Aug 2011) which had beta IPv6 firmware (10.1.0.3), and this works. A bit more info here: [1]

Apple Airport Extreme

The Airport Extreme claims to support native IPv6 over PPPoE but we don't know of anyone who has it working. It still works via tunnels though (tunnel configuration explained on the knowledge base). You need to set the remote tunnel endpoint address to 81.187.81.6, and you need two /64 subnets off us that are statically routed to the Airport's IPv4 address. Assign an IP from one /64 as the WAN address and set the default route to our ping address "bottomless", which is 2001:8b0:0:81::51bb:51bb. Set the LAN address to the first usable IP on the second /64 and it should just work.