blotto99
asked on
DNS - cannot resolve one particular site
I'm having issues with my Windows 2000 DNS Server, in which it is having issues with one particular website. We've been using this corporate business partner site for years without issue. Recently, one day no one could get into it (site not found). I tried an outside internet connection and the site came up fine. I went into NSLOOKUP, resolved the site properly with my DNS server and then everyone could get in. The next day, the same issue occurred.
It appears that after 12 hours, the site is cleared from cache in my internal DNS server. When this happens and clients request the site, it responds with site not found. It won't get added back into the DNS server until I use NSLOOKUP.
My internal DNS server works fine with every other site I've tried. I've gone to sites that I know no one internally has ever gone to and my internal DNS server is contacting my ISP DNS and getting the IP.....all except the one site I really need.
Keep in mind, this internal DNS server has been in place for over a year and nothing has changed recently with our infrastructure. Any ideas?
It appears that after 12 hours, the site is cleared from cache in my internal DNS server. When this happens and clients request the site, it responds with site not found. It won't get added back into the DNS server until I use NSLOOKUP.
My internal DNS server works fine with every other site I've tried. I've gone to sites that I know no one internally has ever gone to and my internal DNS server is contacting my ISP DNS and getting the IP.....all except the one site I really need.
Keep in mind, this internal DNS server has been in place for over a year and nothing has changed recently with our infrastructure. Any ideas?
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DaMaestro
in the interim, you could set the static entry yourself in your internal dns server
Or you could add a hosts file entry for that site
This is included in the vast majority of operating system and allows you to create mappings between domain names and IP addresses.
It is is a text file that contains IP addresses separated by at least once space and then a domain name, with each entry on its own line. So you would simply get the IP address and map it in the hosts file as below.
If you wanted to always go to that company's website you would add an entry as follows:
www.thiscompany.com 217.xxx.xxx.xxx (or whatever the IP address is)
simple but very effective. The computer will use the hosts file before dns and will not bother querying dns if you have a hosts entry
When inputting entries in the hosts file there must be at least one space between the IP address and the domain name. You should not use any web notations such as \, /, or http://. You can disable a specific entry by putting a # sign in front of it.
You can find the hosts file on a W2K system here
c:\winnt\system32\drivers\
If there is not a hosts file there will probably be a sample called hosts.sam which you can use
This is included in the vast majority of operating system and allows you to create mappings between domain names and IP addresses.
It is is a text file that contains IP addresses separated by at least once space and then a domain name, with each entry on its own line. So you would simply get the IP address and map it in the hosts file as below.
If you wanted to always go to that company's website you would add an entry as follows:
www.thiscompany.com 217.xxx.xxx.xxx (or whatever the IP address is)
simple but very effective. The computer will use the hosts file before dns and will not bother querying dns if you have a hosts entry
When inputting entries in the hosts file there must be at least one space between the IP address and the domain name. You should not use any web notations such as \, /, or http://. You can disable a specific entry by putting a # sign in front of it.
You can find the hosts file on a W2K system here
c:\winnt\system32\drivers\
If there is not a hosts file there will probably be a sample called hosts.sam which you can use