Re: Actiontec GT704 and DNS
- From: T. Keating <tkusenet@xxxxxxxxxxx>
- Date: Fri, 30 Nov 2007 10:12:15 -0500
On Mon, 08 Oct 2007 09:22:32 -0700, kenwood0622@xxxxxxxxxxxxx wrote:
If you use an Actiontec GT704-WG wireless ADSL router, are familiar
with configuring it, and have a spare 5 minutes or so, perhaps you
could run a quick test. I am having a problem with my GT704 and
feel that it is inherent in the firmware and not a defect of my
particular router but I cannot be 100% certain.
The GT-704 dns functions is broken big time..
They've known about the issue for a long time.. (2yrs?)
Same goes for those turkeys @ TI , who shipped the broken
reference firmware to the OEMs.
The internal dproxy program, eventually runs out of file
handles(1024) in the limited busybox, (linux 2.4.17 ramonly),
environment and either hangs or crashes in a couple of days.
Do not use it..
I recommend pointing all of your PC dns entries to your ISP's DNS
IP addresses.. and kill off the dproxy process by telneting into the
GT-704.. Log in as 'admin'.... Password.. "your web password" and
type
kill -9 `pidoff dproxy`.. and then exit.
If you run servers behind this DSLmodem/gateway.. I also recommend
doing the following.. before logging out.
cd /proc/sys/net/ip4/netfilter
echo 1800 > *close_wait
echo 3600 > *established
Which prevents /proc/net/ip_conntrack (NAT function) table overflow
when someone lunches a spoof attack.
Note: Each time you reboot/power cycle.. all of these configuration
settings are lost. If you need to retrain/reset the DSL connection,
simply disconnect the phone line connection for a second or two.
I have found that if I set up the router in DHCP configuration, but
specify what DNS servers should be issued to the clients (static
rather than dynamic), the modem still continues to issue its own LAN
IP address and the local ISP DNS server IP address rather than the IP
addresses
that I have specified. I would like to know if this the case for all
GT704s or only mine.
Actiontec has posted only one firmware.. 3.0.1.6.0- GT704 for the
unit.. All of them suffer from the same problem.
Actiontec tech support is virtually non-existant.
Note: 3rd party OEM's like Quest may have fixed these bugs in the
versions they ship to their customers.
In order to run the test you must first configure the GT704 to use two
DNS servers that are not associated with your ISP. A good set of
instructions, if you are not familiar with the procedure or do not
know of two DNS servers to use, can be found at
https://www.opendns.com/start?device=actiontec-gt704 .
After you have rebooted the GT704 and confirmed that IP addresses you
entered have been saved, one way of determining what DNS server IP
addresses are being issued to your Windows XP client (assuming it is
using DHCP to obtain an IP address and DNS server information) is to
open up a command prompt and issue the command "IPCONFIG /renew"
followed by the command "IPCONFIG /all". The DNS servers listed by
the second command should show the addresses you configured the GT704
to issue. I would be curious if that was the case, or if it continues
to issue the LAN IP address of the GT704 (probably a 192.168.xxx.xxx
address) and your local ISP DNS server IP address.
After the test you can repeat the configuration procedure but select
dynamic rather than static to return your GT704 to its original
configuration. Thanks for your help.
.
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