DI-614+ and DNS

Hi,

I have a DI-614+ wireless router at home.

I also have a Thinkpad T42 with an Intel 2200BG wireless network
adapter. Every couple of days, My laptop does not have an Internet
connection and when I check what the problem is, I see that the DNS
inside the router does not resolve addresses although it is accesible
via ping. What I do to fix this is reboot the router.

Does anyone have a clue as to why this is happening?

Thanks,
Gil

"gilshai" <(E-Mail Removed)> hath wroth:

>I have a DI-614+ wireless router at home.

I had one in my office for a while. It worked well enough.

>I also have a Thinkpad T42 with an Intel 2200BG wireless network
>adapter. Every couple of days, My laptop does not have an Internet
>connection and when I check what the problem is, I see that the DNS
>inside the router does not resolve addresses although it is accesible
>via ping. What I do to fix this is reboot the router.

Can you ping anything by IP address on the internet (not just the
router's IP)? Try Yahoo at:
Pinging www.yahoo.akadns.net [66.94.230.44] with 32 bytes of data:
If that works, then you have a DNS problem. See below. If it does
NOT work, then you have some type of connectivity or router/modem
stability problem. Not enough info to debug this.

>Does anyone have a clue as to why this is happening?

Just a guess(tm) if it's DNS. The DI-614+ has a DNS cache inside
designed to minimize DNS lookups. That's why your computers have the
IP address of the router as the DNS server(s). If you're doing lots
of lookups, the internal DNS cache might get lost or muddled. Mine
didn't do that but was ocassionally confused by DNS juggling load
balancing schemes.

If I suspect a DNS cache problem, I simply don't use it. Configure
your DNS servers on the client computer to point to your ISP's DNS
servers directly. You can still use DHCP to get the IP address and
gateway from the DI-614+, but the DNS can be set seperately.

As usual, there are a few potential problems. Some ISP's juggle their
DNS servers to avoid DoS attack problems. If you select one of these,
it might easily disappear. If this is a problem, then you can select
some of the open DNS servers on the internet run by universities and
large companies. It's considered good form to ask before using these,
but few people bother. I have my DNS servers set to:
1. My ISP's primary server.
2. The local university.
3. A different ISP's server.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

[POSTED TO alt.internet.wireless - REPLY ON USENET PLEASE]

In <(E-Mail Removed)> on Sun, 05 Feb 2006 09:57:52
-0800, Jeff Liebermann <(E-Mail Removed)> wrote:

>Just a guess(tm) if it's DNS. The DI-614+ has a DNS cache inside
>designed to minimize DNS lookups. That's why your computers have the
>IP address of the router as the DNS server(s). If you're doing lots
>of lookups, the internal DNS cache might get lost or muddled. Mine
>didn't do that but was ocassionally confused by DNS juggling load
>balancing schemes.
>
>If I suspect a DNS cache problem, I simply don't use it. Configure
>your DNS servers on the client computer to point to your ISP's DNS
>servers directly. You can still use DHCP to get the IP address and
>gateway from the DI-614+, but the DNS can be set seperately.
>
>As usual, there are a few potential problems. ...

4. You lose DNS lookup for clients on your local network. Work-around is to
configure static IP addresses (by MAC address).

--
Best regards, SEE THE FAQ FOR ALT.INTERNET.WIRELESS AT
John Navas <http://en.wikibooks.org/wiki/FAQ_for_alt.internet.wireless>