Thanks for the explanation. What piques my curiosity is that only one of my computers has this issue. I have a desktop with Fedora 10, a laptop with Linux Mint 6, and a server with Debian 5. Both Fedora and Mint set up resolv.conf with just the address of the router as the only nameserver and perform lookups at normal speed. I really just want to know what is different in Debian that causes this discrepancy. Ian
On Apr 1, 9:25 pm, Ray Parrish <[email protected]> wrote: > Ian wrote: > > I went back and forth between my Debian server and my Fedora desktop > > and noticed some interesting things. On Fedora DNS lookups work fine > > in elinks and every other applications except wget, unless ipv6 is > > enabled in which case it takes exactly 20 seconds to do a DNS lookup. > > Wget on Fedora still takes 20 seconds to do its DNS lookup even with > > ipv6 disabled unless I explicitly use the -4 flag with it. On Debian > > all DNS lookups take 20 seconds for me even with ipv6 disabled. The > > resolv.conf on both boxes just has the ip of the router listed as the > > nameserver. > > > When I added OpenDNS as the first nameserver in resolve.conf, all DNS > > lookups started working like they should in Debian and wget lookups > > were corrected in Fedora. If I can figure out how to keep my /etc/ > > resolv.conf from being wiped out on reboot I think everything will be > > working correctly. > > > I'm curious why OpenDNS works so much better for me than my ISPs > > nameservers and why there is this difference in behaviour between > > Debian and Fedora when both are setup right now as standard clients on > > the network. > > > Thanks > > Ian > > Well, one thing I notice from your post above, is that you were *not* > using your isp's name servers, if you had your router's ip listed as the > name server. in resolv.conf. That was very likely the cause of the slow > look ups. > > If I log into my router, I get the following values for name servers - > > DNS Address #1: 205.171.3.25 > DNS Address #2: 205.171.2.25 > > The router's it self's ip address is 192.168.0.1, which is a far cry > from the correct settings for a name server. You seem to have found a > solution, by setting your name server to OpenDNS, but you should > additionally be able to call your isp, and ask them what the correct > values are for your two default name servers. > > You may be getting good look up times now with only one setting to > OpenDNS for a name server, but as they gain in popularity, it's entirely > possible that their increasing client load will slow things down for > you, especially as you continue to only have one correctly specified > name server. > > Having a second name server correctly specified, can keep your look up > speeds in an acceptable range, if one of the name servers slows down for > some reason, and is likely why your isp usually points your > configuration at two of them, instead of just one. > > For servers that you access on a very often basis, you can also bypass > the DNS servers entirely, by specifying the ip addresses for those web > sites you visit most frequently directly in your /etc/hosts file. Just > do a whois on each server to get it's ip address, and add that ip to the > front of a new line in your hosts file, with the corresponding domain > name following it after a space on the same line, and you will have your > own name server going on there, which is much quicker, at least until > you begin to get a very, very, large hosts file which may slow things a > little. > > You should be in good shape with that trick, unless one of your often > accessed servers changes it's ip address for some reason, but for the > most part they tend to remain at a static ip address, so that shouldn't > be too much of a problem. > > Later, Ray Parrish > > -- > Human reviewed index of links about the computerhttp://www.rayslinks.com > Poetry from the mind of a > Schizophrenichttp://www.writingsoftheschizophrenic.com/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Linux Users Group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] For more options, visit our group at http://groups.google.com/group/linuxusersgroup -~----------~----~----~----~------~----~------~--~---
