DNS issues in Panther

vancenase · 11-24-2003, 06:28 PM

hi all-

this is a continuation of my thread started here:
http://forums.macosxhints.com/showth...threadid=17195

i'm moving it here because i think it is not an 'application' problem but a 'network' problem. see my last few posts there for details (some of which i'll copy below), but i'm having issues apparently with DNS.

i installed 'dnstracer' and it seems to verify that i can ping/recognize IP addresses just fine, but for hostnames I have to 'ping' it at least twice before it is recognized.

there was an odd line (i've never see it before, at least) in my /etc/hosts file:

Code:

::1     localhost

i took it out, and that seemed to do the trick for a minute or so after rebooting ... but the problems reappeared. i'd like to think this is not a router issue, since it was working perfectly up until a few days/week ago ... and i haven't updated an firmware on it (so that can't be the culprit, nor will it help because there aren't any upgrades available).

the only 'software' that has been installed on this computer related to network connectivity in the past few weeks would be Panther ... and i think someone put mldonkey (mlmac) on it (argh! maybe that is where the odd host line came from?) ... and i think one of those distrubuted computing programs (folding@home).

anywho, any help is much appreciated!

breen · 11-24-2003, 07:25 PM

That entry is an ipv6 one for localhost -- it's equivalent to
127.0.0.1.

Whatever's causing your DNS problems, that isn't it.

hayne · 11-24-2003, 09:43 PM

Quote:


	Originally posted by vancenase i installed 'dnstracer' and it seems to verify that i can ping/recognize IP addresses just fine, but for hostnames I have to 'ping' it at least twice before it is recognized.

You seem to be mixing up two quite different things.
You use 'ping' to see if you can send packets to a specified computer. You can specify the computer by IP address or hostname.

If you use a hostname, then your computer first makes a query to its DNS server to translate the hostname into an IP address.

You use 'dnstracer' to find out details about which computers are being used to do the DNS translation and whether they are responding properly.

So what do you get when you run 'dnstracer -o www.google.com' for example? (It is best to use the "-o" option to get the result of the hostname lookup. Please copy & paste the results here.

vancenase · 11-24-2003, 09:57 PM

i just noticed this posted on my ISP's website:

Quote:


	Red 11/24/2003_ 6:19 PM _ Road Runner is currently experiencing issues with the cable network. Subscribers in the affected area(s) may experience a loss of connectivity, usually indicated by flashing modem lights and/or a loss of video services. Our engineers are working quickly to resolve this issue. We apologize for any inconvenience this may cause.

this was going on yesterday as well (last night). i'm going to wait to see if/when this is cleared up and try again afterwards. i have normal modem lights, but perhaps the problems are 'not light sensored' .. if that makes sense. (i've got a head cold, which might explain some of my explanations)

vancenase · 11-25-2003, 02:16 PM

ok, when i'm not at home (cable modem; roadrunner) but at school (lan) ... no problems, at least it seems.

must be the service provider ... or the router ... at least it's not my computer.

hayne · 11-25-2003, 05:28 PM

Quote:


	Originally posted by vancenase must be the service provider ... or the router ... at least it's not my computer.

DNS services would normally be provided by your ISP, so it is to be expected that any DNS issue would depend on what network you were hooked up to.

vancenase · 11-25-2003, 05:34 PM

Quote:


	Originally posted by hayne DNS services would normally be provided by your ISP, so it is to be expected that any DNS issue would depend on what network you were hooked up to.

good to hear!

gritmonkey · 12-02-2004, 07:47 PM

Quote:

Originally Posted by vancenase


	ok, when i'm not at home (cable modem; roadrunner) but at school (lan) ... no problems, at least it seems. must be the service provider ... or the router ... at least it's not my computer.

Do you use DHCP at both locations? Just for clarification, you don't have any problems at school?

biscuit_tech · 12-03-2004, 11:01 AM

http://forums.macosxhints.com/showthread.php?t=14063

11-24-2003, 06:28 PM	#1
vancenase All Star Join Date: Apr 2003 Location: OH Posts: 934	DNS issues in Panther hi all- this is a continuation of my thread started here: http://forums.macosxhints.com/showth...threadid=17195 i'm moving it here because i think it is not an 'application' problem but a 'network' problem. see my last few posts there for details (some of which i'll copy below), but i'm having issues apparently with DNS. i installed 'dnstracer' and it seems to verify that i can ping/recognize IP addresses just fine, but for hostnames I have to 'ping' it at least twice before it is recognized. there was an odd line (i've never see it before, at least) in my /etc/hosts file: Code: ::1 localhost i took it out, and that seemed to do the trick for a minute or so after rebooting ... but the problems reappeared. i'd like to think this is not a router issue, since it was working perfectly up until a few days/week ago ... and i haven't updated an firmware on it (so that can't be the culprit, nor will it help because there aren't any upgrades available). the only 'software' that has been installed on this computer related to network connectivity in the past few weeks would be Panther ... and i think someone put mldonkey (mlmac) on it (argh! maybe that is where the odd host line came from?) ... and i think one of those distrubuted computing programs (folding@home). anywho, any help is much appreciated!

12-03-2004, 11:01 AM	#9
biscuit_tech Prospect Join Date: Jul 2002 Posts: 17	see this thread, same issue http://forums.macosxhints.com/showthread.php?t=14063

11-24-2003, 07:25 PM	#2
breen Major Leaguer Join Date: Jan 2003 Location: Bay Area Posts: 327	That entry is an ipv6 one for localhost -- it's equivalent to 127.0.0.1. Whatever's causing your DNS problems, that isn't it.

11-25-2003, 02:16 PM	#5
vancenase All Star Join Date: Apr 2003 Location: OH Posts: 934	ok, when i'm not at home (cable modem; roadrunner) but at school (lan) ... no problems, at least it seems. must be the service provider ... or the router ... at least it's not my computer.