Customizing the DNS server for a Netgear CG3000D?
How do I use a custom DNS server with a Netgear CG3000D modem? It appears the software doesn't allow it. Is there other firmware I could use on it that would allow custom DNS servers? thanks
Forum Discussion
A work around might be to set static DNS on each computer. This would have the added benefit of decreasing latency for DNS requests since they don't have to relay through the router.
The whole point of a gateway is to simplify the WAN > LAN connection, so it doesn't allow configuration of that DHCP connection. I think you may need a separate modem and router if you want to go that method.
But even if you did, how would you stop someone from setting their DNS to something other then DHCP acquired?
This feature is not available on the CG3000D. In the situation as you describe the solution Health Edge proposed is most likely to work.
Health Edge said:
This is possible with an iptables firewall command, which blocks everyone on the LAN from using their own custom DNS:
But even if you did, how would you stop someone from setting their DNS to something other then DHCP acquired?iptables -t nat -A PREROUTING -i br0 -p udp --dport 53 -j DNAT --to $(nvram get lan_ipaddr)
iptables -t nat -A PREROUTING -i br0 -p tcp --dport 53 -j DNAT --to $(nvram get lan_ipaddr)ChrisL said:
This feature is not available on the CG3000D. In the situation as you describe the solution Health Edge proposed is most likely to work.-Chris
Cox Support Forums ModeratorIs there any alternative firmware I could put on it that would enable custom DNS?
thanks
- Because it's an integrated gateway device the customer does not have access to functions such as upgrading firmware. These devices were designed for customers wanting a simple, low maintenance home networking solution with limited access to features which could adversely affect the connection if used incorrectly. For situations such as yours you would probably be better off with a separate modem/router solution.
You can get OpenDNS working with your Netgear router by going to http://netgear.opendns.com/ and downloading, installing the software. I did this and OpenDNS is working great on my network.
Interesting. There you go.
Still feel like you put 50$ worth of effort into a 20$ piece of equipment, but impressive work around none the less. Props.
Hmm. That's the management page for the Live Parental Controls feature for Netgear standalone routers. I assume they use OpenDNS for their IP-based filtering.
That's not listed as a feature of the CG3000D in the manual, and their FAQ doesn't list the CG3000D as a supported device, so we can't officially support this.
