PDA

View Full Version : Netgear router problems


RexMundo
27/07/2009, 12:23
Hi
I got a DG834G v2.
I get constant dns problems every 2-3 hours and its getting a bit annoying. Its been happened ever since I moved to LLU.

I have been monitoring the sticky above. I dont have the issue with connection losses.. but I have updated by FW rules anyone. HAsnt made a difference.

So my question is..
a) Is there any way I can update my config to fix DNS settings (I saw some people talking about putting the router in bridge mode.. is that possible on mine? not sure)
b)If not, then are there any routers that are guaranteed to work?

I feel that the DNS problem is like a network split.. I had issues where, when I am directly trying to access some IBM servers to download stuff (partnerworld) I cant!! No connectivity. But if I go through my companies network (VPN) then my internet access is fine (and no the partnerworld sites are not in the company intranet or anything like that.. they are just regular internet).

thanks!

James
27/07/2009, 19:53
This is still very likely to be the same issue as posted in the other thread, or a part of it. When this happens, are your router lights on as normal, and does your router status page show all is well and connected, with an IP address etc?

You could try using a third party DNS server like OpenDNS. Go in to Basic Settings and chang ethe DNS setting to "Use the following DNS" and enter:

Primary: 208.67.222.222
Secondary: 208.67.220.220

to see if that helps

RexMundo
27/07/2009, 20:09
It is the DNS problem as the stickeh above, but there doesnt seem to have a resolution to it.

Do the open DNS servers resolve everything? I may try them.

When the problem does happen lights etc is ok. Status page shows an IP address, and I can ping the gateway IP, but not the DNS servers. I can also access things using an IP address but not a FQDN.

When I am VPN'ed in, it works flawlessly for any amount of time so its definitely not disconnecting me.

I'll try the openDNS but in the meantime can someone please answer this.. Does this ONLY happen for netgear routers and are there any routers out there guaranteed to work?

I know for DG834g its "recommended" to be V4 but to be honest but v2 can download at almost the full 8Mbits.. (950KBs) so not in a hurry to change.

fjs
28/07/2009, 00:27
Telnet into the router.

In a terminal window apply

sysctl -w net.ipv4.neigh.nas0.ucast_solicit=0

Does not survive reboots, BTW.

RexMundo
28/07/2009, 11:25
fantastic, thanks I'll try that.

Do you know if router has a cron daemon? I could add it to that, have it run every hour or so.

Or does it have init.d? I could add it to as a startup service.

rgds
G

fjs
28/07/2009, 13:11
See the DNS Sticky thread.

Grunson has reminded me that <sysctl> is not present in standard firmware, so you are stuck with

echo 0 > /proc/sys/net/ipv4/neigh/nas0/ucast_solicit

which, of course, does the same thing.

Routers seem to have so little RAM and useable flash that you cannot do what you are talking about.

My problem was that all non-standard items in /etc are erased at reboot also.

The only permanent solutions are to

recompile your own modified firmware
use the Netgear in bridge mode, and a 2nd router using DD-WRT, which can write startup tweaks to nvram on the router.

James is going to do the former
I will be playing around with the latter in a few days time.

RexMundo
28/07/2009, 21:43
Thanks for the response...

have any non stock firmware, like DD-WRT or DGteams been compiled with this in mind?

I'll re-read the sticky thread.

fjs
28/07/2009, 22:27
Thanks for the response...

have any non stock firmware, like DD-WRT or DGteams been compiled with this in mind?

I'll re-read the sticky thread.

DD-WRT does not run on modem ie transceiver plus router devices, like the Netgear.

DGTeam do not preserve commands between reboots. DGTeam are not responsive to feature requests, but you could try.

James
30/07/2009, 19:33
As soon as the DGteam site comes back up (can't get to it tonight!) I'll be making a modified version of:

DG834GT
DG834G v1/2/3/4
DG834PN
DG834N
DGN2000

and others upon request.

Destroyer
31/07/2009, 18:29
As soon as the DGteam site comes back up (can't get to it tonight!) I'll be making a modified version of:

DG834GT
DG834G v1/2/3/4
DG834PN
DG834N
DGN2000

and others upon request.

Wow - great stuff!

DooGie
31/07/2009, 20:13
As soon as the DGteam site comes back up (can't get to it tonight!) I'll be making a modified version of:

DG834GT
DG834G v1/2/3/4
DG834PN
DG834N
DGN2000

and others upon request.

Bring it on James :)