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wasp691

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#91933 23-Oct-2011 19:56
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I have a Thomson TG585v7 and I would like to configure it to modem only as I have a Cisco router. Have searched but can not find simple instructions. I understand I need to set it to bridge mode.

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webwat
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  #536798 23-Oct-2011 20:53
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Yes, the option for bridge mode would normally be one of the PPPoA settings. Not sure if its there on a Thompson since everybody complains about those, but I know some of the features are pretty basic.




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wasp691

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  #536915 24-Oct-2011 12:45
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Thanks, I can find those settings but there does not appear to be a way of changing the settings. May be time to upgrade to a better modem.

Ragnor
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  #537074 24-Oct-2011 23:40
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wasp691: I have a Thomson TG585v7 and I would like to configure it to modem only as I have a Cisco router. Have searched but can not find simple instructions. I understand I need to set it to bridge mode.


At the bottom of the home networking page in the Thomson admin ui is "Assign public IP address to a device.". 

The speedtouch then handles the authentication but hands the IP to the device (router or other device) that you assign.

You may need to make sure the Cisco is using a different LAN network, eg: if the Thomson is using 192.168.1.x configure the Cisco to use 192.168.2.x for LAN and DHCP. Can't remember exactly if this is needed or not. 



Tom_Rush
208 posts

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  #538347 27-Oct-2011 21:09
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Sorry if I'm not understanding the question.

If one just wants to use the TG585v7 as an ADSL2+ modem and then connect another gateway/router to it to provide LAN services/extend the network, then that's pretty easy with an Ethernet connection/cable.

Just plug in a cable to Ethernet port1 on the Thomson and then the other end into the Cisco router/gateway WAN port.

Then just assign IP address 10.129.1.253/255.255.255.252 to the Ethernet port on the TG585v7 and then 10.129.1.254/255.255.255.252 to the Cisco box(router). Then on the Cisco 10.129.1.254 becomes the default gateway to the Internet.

The Ethernet ports can be assigned IP addresses in this manner from the GUI on the Thomson.



Job done.

This set up does mean a double NAT'd connect to any LAN services.

If you wanted to bridge the two devices Thomson/Cisco over Ethernet, then that's something I haven't done. But wouldn't you lose some of the firewalling/security features?

I take it you're not attempting to bridge over WiFi, again which the Thomson can do.

The remaining Ethernet ports on the Thomson can be assigned to another 'group' and used as a separate IP network with there own DHCP.

With a bit of work they can be configured as a DMZ as well.

I still enable the Thomson WiFi every now and then as it makes a good Guest connection as any client can not 'route' back into your Cisco box and thus share your LAN services, unless you configure that.

Plus, just because I could, I created a second WiFi SSID on my Thomson and I'm currently playing around to see if I can add it to a VLAN to provide yet another Internet access point. All fun and games.

I would shy away from EVER using 192.168.1.0/24 on a network in service as it leads to sloppy IP routing as a lot of devices default to IP addresses in the 192.168.1.0/24 range.

I reset my Thomson and removed all the original 192.168.0.0/16 addressing.

Go wild you have the whole 10.0.0.0/8 network to play with. Laughing

The Thomson is way smarter than people give it credit.

I'm sure I haven't understood the question when I read what I've written. Laughing

Ragnor
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  #538447 28-Oct-2011 01:50
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I would avoid Double NAT personally, it's fine for basic web browsing, and not much more

If you want to forward/open a port you need to do it both routers.

It interferes with useful and convenient protocols like UPNP, NAT-PMP, Apple Bonjour eg: devices only dynamically request ports be opened in router doing the closest layer of NAT.

Typically interferes with p2p gaming or hosting/joining various game on PC, PS3 and Xbox. eg: If you search for say Xbox live open nat you will see tons and tons of posts.

Tom_Rush
208 posts

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  #538716 28-Oct-2011 13:43
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Ah, see that's where I'm in a world of my own.
Don't do online gaming, and don't have plug and play connections via the Internet... come to that my NAS and LAN has anything to do with Apple turned off. How sad is that.

However as you may have read in other posts I may be looking at a rethink of my Thomson modem and Linksys E4200 'router' interconnection which may have some spinoff for the original OP.

Spent a lot of time turning bridged networks into routed/switched/VLAN'd ones, now I'm looking at going the other other way... my how the worm has turned.

Maybe a VLAN trunk.... that sounds nice.... on a Thomson... maybe not then.

I haven't even started to look at this but if AND that's a BIG if VLAN tagging is compatible between the Thomson and Tomato firmware.... just an idea and maybe not a good one.
 


Tom_Rush
208 posts

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  #541002 4-Nov-2011 04:33
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Ok, I was going to do something amazing like a half bridge or something, BUT...

I'm still sticking with double NAT and routing between the router (Linksys E4200) and modem (TG585v8).

I now have OpenVPN and PPTP servers configured via this setup and it's working VERY well.

Now using the TG585v8 as a guest WiFi and DMZ on a select number of Ethernet ports with there own DHCP.
One ethernet is a point-to-point WAN connection to my LAN router.

I have other IP port forwarded services and beefed up the firewall on the TG585v8 to block specific networks inbound on given ports.

It's all working so well with the Thomson TG585v8 (for me) that it seems pointless to change it. 



If one did want to use a half bridge using a Thomson modem then the work has already been done and shown to work.
This was using PPPoA and PPTP with a PPPoA relay.

See the following link for pointers on how to set it up.

http://forums.whirlpool.net.au/archive/595905

So with the sleeves rolled up and a bit of engineering I believe the Thomson is still a working solution.
However, many people feel the Thomson can not provide the services they require and have moved to other solutions.

I can't comment on gaming and Apple specific IP ports as I'm not using them, but so far the VPN ports I'm using work fine when double NAT'd to a Linksys E4200 running Tomato firmware.

 



Ragnor
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  #541149 4-Nov-2011 13:57
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Yeah the issues with the Thomson aren't really to do with lack of features.

What we've seen on GZ in many past threads are issues with:
- General hardware failure rate
- The firmware Telecom ship's seems to have issues with has issues with Macbook wifi chipsets. 
- Firewall/NAT issues with gaming online.

The 2nd two can be over come with technical knowledge (flash uk firmware, telnet to the device and enter some commands), but it's a big ask for average users.

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