Connect Timeout and Firewall/NAT (Build 151)

oldfart

<div class="IPBDescription">Compare 2 x Modems/Gateways</div>Hi guys,

This may be of interest to the Network developers...

<u>Scenario</u>:
Attempting to connect to a Net based dedicated NS2 Server (run by our clan)
Connection FAILED (Timed out) - when using the Cable Internet connection
Connection SUCCEEDS - when using the ADSL2+ connection

Environment:

<u>Server</u>:
1. Clan run Dedicated Win2K3 server with NS2 Build 151 (118.127.17.113:27015)


<u>Client</u>:
Intel Pentium III 2833MHz (Quad Core)
2GB RAM
NVidia GeForce 9800GT

<u>CABLE - Internet Connection #1</u>:
Telstra Cable
Modem: NetGear Wireless Cable Modem Gateway CG814WG
SW Version: V3.9.26R14
HW Version: 1.03
IP: Dynamic
Firewall: Enabled
No Ports Forwarded.
Subnet: 192.168.0.x
Mask: 255.255.254.0

<u>ADSL2+ Internet Connect #2</u>:
TPG ADSL2+
Modem: Billion BiPAC 7300A
SW Version: 1.36-698_sso_billion
HW Version: TRENDCHIP TC3162
IP: Static
Firewall: Default
Ports Forwarded: To a web server not the game PC above.
Subnet: 192.168.1.x
Mask: 255.255.254.0

I hope this makes sense to you guys but basically I have 2 x Internet connections to my home. One is Cable the other is ADSL2+. Our dedicated server is in another state.

I just swapped the Game PC from using 1 x gateway to the other - without even changing the game PC's IP.

FWIW:
I have recently written some UDP Hole punching software and have noticed the different information returned by each modem when contacting an internal P2P server using the external addresses.

The Netgear modem returned the External IP address.
The Billion modem returned the Gateway address.

cheers
<u>OldFart</u>

tk-421

<a href="http://getsatisfaction.com/unknownworlds" target="_blank">http://getsatisfaction.com/unknownworlds</a>

duvel

lol @ logo :p

puzl

What you are doing should work fine, but experience has thought me not to be clever with splitting subnets using consumer networking gear.

Can you reboot the PC and the routers after changing the gateway and see if the problem persists?

oldfart

<!--quoteo(post=1794749:date=Aug 18 2010, 02:32 AM:name=puzl)--><div class='quotetop'>QUOTE (puzl @ Aug 18 2010, 02:32 AM) <a href="index.php?act=findpost&pid=1794749"><{POST_SNAPBACK}></a></div><div class='quotemain'><!--quotec-->What you are doing should work fine, but experience has thought me not to be clever with splitting subnets using consumer networking gear.

Can you reboot the PC and the routers after changing the gateway and see if the problem persists?<!--QuoteEnd--></div><!--QuoteEEnd-->

Hi <b>puzl</b>,

These subnets work fine and have been for the last 4 x years - they share 1 x switch in common, as it allows me to access my web server from the family (internal) LAN. For gaming we mostly use the Cable and only use the ADSL2+ when we are capped.

I am happy to do some experimenting for you as I am a net/embedded analyst/programmer - but I would like more specific instructions than just rebooting PCs.

I suggest maybe something like ...
1. Use Cable Modem with the subnet connecting switch disconnected and the PC's mask set to 255.255.255.0 etc
2. ...

My sons' (different PC's on the 192.168.0.x subnet) are also having problems accessing Net based servers using the Cable connection and modem. I will get them to try via the ADSL2+ Modem tomorrow - if you wish.

I hope this is of some help to you.

cheers
<u>OldFart</u>