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Is this a DNS Problem

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11 replies

by nuru

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I have a problem getting to some site on the net from our network, even though they exist. But if I use a search engine and try getting there through the search engine it works fine. I then use the "whois" from network solution and discovered that the site is hosted by a domain name with domain.co.uk while the site address is domain.com. Doing a "tracert" using the domain name will also return a site unreachable error, but if the IP address of the domain is used it works fine.

11 replies

by astute

1. Check the whois database and make sure it
points to the correct name servers, If not
request network solutions to change it to the correct IP of the name servers.

2. Make sure u have a new zone created in the dns server for this new domain.Also
u can add some host entries or cnames records
to the new site.

Good luck

by nuru

Thanks for your effort, but the site is not on our network, it's our network that cannot get to the site. other network can get to the site but we can't. The Domain I'm trying to reach is waverider.co.uk, and the site is landell-mills.com. That is if you use a web browers and you type landell-mills.com it only return an error page, but you can get to the domain, waverider.co.uk, they are the one hosting the site.

by bhrdwh

Nuru, I assume that you are havign a DNS serevr at your place, sincxe you know the IP & site nae, simpley create a new zone & add it. It is a DNS problem & will get solved thru this. You could also get in touch with your ISP & get himn to add this IP in his DNS as well !!

by nuru

Yes I thought of that kashdeep_b@yahoo.com but it means for every site I cannot get to, I have to create a record for that site and beside 197.204.28.2 will only refer you to the site domain name which is waverider.co.uk and not landell-mills.comThanks anyway

by frobo

Hi,

i am not the best in DNS-problems, but could it be, that your DNS-Forwarder have old-Data in its cache ? It might be right, that you have to check the hole way from your network down to the Provider. I would call the ISP first, and ask him ifcould check that for me. If it works by him, than i would look back to my Network and would cut Problem in peases, IP-Segemnt for Segment and look if the lokal DNS has the same problem.

It sounds like abit of work to do, i mean could that some one else has a better idea.

havanice day

frobo

by nuru

Thanks frobo,

Our internet conection does not go through any provider we are connected straight to the internet backbone via sattelite. However someone sugested the problem might be from the router, I'm still checking but the question is still open for any suggestion.

by martin wiedmeyer

Your description certainly sounds like a name resolution issue...

To debug, you may want to try temporarily pointing one of your machines to another DNS server.

Is your DNS server managed by your company or are you using your ISP's DNS server?

If it is managed by your company, try using your ISP's DNS server. If you are using your ISP's DNS server try to find a DNS server that is reasonably close to you geographically.

by nuru

Thanks martin.wiedmeyer@usa.net, but did not work, we manage our own dns server. And may i repeat again we are not using any ISP, we have our own setup, 90% of site we can get to except few like i've mentioned ealier.

by stillatit

Unfortunately, the .com domain has been liberalized over the years, and you will frequently see a .com hosted by a host site in another country. If their DNS is right, you should have no problems on that account.

Typing www.landell-mills.com frommy home brought up their site.

Because of the way site hosting companies work, it is possible for the IP of a named site to move around at infrequent intervals as the host shuffles servers, or as the company moves to a different hosting site. Asa result, the IP address you saved last week may not be good this week.

Unfortunately, not all host sites use a short TTL (time to live) on their DNS entries, and as a result if, for example, they have a 30 day TTL and do not change their serial number when they change an IP, your DNS server will cache the old address for 30 days or until it flushes the cache to make room for other entries.

By the way, talking about using the domain name, it is NOT always the case that if a company has a site www.company.com, that using company.com will get to the same address, or to any address. It depends on what they have set up in their DNS.

Things to check:

a) If you have a HOSTS file on your computer, make sure that if you have an entryfor your target site, the entry is correct. Better yet, comment out the entry.

b) If you have put any records for these sites into your DNS as shortcuts, delete them.

c) If you have shortcuts in "favorites" the same thing applies. You may be pointing at an old IP address.

d) Using NSLOOKUP, try looking up their site (don't forget the www.) on your DNS server, then on someone else's DNS server. If your server has a different result, you may have an old number cached.

Good luck.

by nuru

Thanks Guys, the problem has been solved.

Apperently the problem was from the router, A cisco egineer solved it, but I've requested that he makes a write up of the solution. I will post the answer as soon as I get it.

Nurudeen

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