List of routers that have problems with but torrent and how to solve them when it's possible

Contents [hide]
1 Due to (too) many connections
2 Due to UPnP
3 Due to Port Forwarding
4 Reason not yet verified
5 Usual solutions

[edit]Due to (too) many connections
The following routers have known problems with too many global connections. Limiting them to 200 or less should fix the problems:

D-Link DI-624
D-Link DSL-G664T
Linksys BEFSR41V4/BESR41
Linksys Wireless-b
Netgear DG632
Netgear DG834G
Netgear MR814
Netgear Rangemax 802.11n WPN824
Netgear WGT524
Netgear WGR614
SpeedStream 5660 in Router/NAPT configuration. Latest firmware is 2.(3).7. Alternate workarounds:
Switch to bridged mode. (For security, firewall your network.)
When it dies, just power-cycle the router and continue on.
W-Linx MB401-S (and SMC Barricade 7004 BR, which is identical in construction)
WRT54G/GL/GS
[edit]Due to UPnP
Zyxel Prestige 660hw
D-Link DI-604 (one case of random disconnects with UPnP enabled in Azureus)
D-Link DI-604 with the newest firmware and revision c hardware where it will drop the connection every time azureus
is run.

[edit]Due to Port Forwarding
D-Link DI-514 (not port forwarding UDP protocol consistently)
[edit]Reason not yet verified
Apple airport extreme (802.11g wireless with wep 128bit)
Setting the router IPv6 support (under advanced) from local to tunnel may help in addition to the solutions listed below.
[edit]Usual solutions
Updating the router firmware
Note: If you consider yourself as an experienced user you can also try to install a 3rd party firmware if there is one for your specific model. Often those 3rd party firmwares are tuned for higher loads. But be warned: A failed firmware installation can render your router useless or require a complicated reset/manual firmware repair procedure.
Turning off the UPnP plugin and doing manual port forwarding
Binding outgoing connections to a single port (see advanced network settings)
Restricting the number of global connections to something between 60 and 100
Disabling the DDB plugin
Connect to the internet without the router/only the modem (for testing purposes)
Getting a new router if all else fails