HELP: Host names under same domain, some work some not.

Hello everyone,

I am new here and also new in the field of system administration. Now I have a problem is killing me:

My company has a domain name like COMPANY.com. Under this domain, there are several servers called Apollo, Dev, Olympus, and Venus. Each server has a host name, so they should be accessed via Internet by using: URL
URL and so on.

Now the problem is: every host is accessible for browser inside our network, however, only two of them is accessible outside. The two new added servers are unavailable via the Internet when I tested at home.

I have no idea about how to make them available outside, actually, no one in my company is good at it, but I have to make it happy by Friday.


Please help me!!!! Thanks in advance!!!!!

Does each server have it's own external internet IP address? If so, can you access the server via that address? If you can access them via IP address, then it may be a DNS issue. Do you have an A record for the subdomains? Who provides your DNS?

If you can't access them via IP address, is there a firewall, router, or switch involved?

Some people don't like playing the guessing game. Stuff like real domains and hosts are highly useful for diagnosing a problem.

freemans-web:

Thanks for your reply! I have no idea about external IP address. I can only get the server's IP address from the Dos command window, and got the results like: 10.0.0.12, 10.0.0.14, etc. Are they internal IP address? How can I get the external IP address? Do I have to register them, and where : (.

BTW, from home, I can check the links to servers by using: Tracert command. Only two servers can be connected. Does it mean only the two server registered?

Thanks a lot!

SilentRage:

Thanks for your reminding. I am new here, if I did not post my thread correctly, I apologize for it. However, I am also new in my company, I am not sure that I have the privilege to post the links here.

You need to gather more information. Operating system, domain name, type of network. Post the question in the networking forum. DNS may be an issue, but you need to get the basics figured out first.

Thanks, freemans-web.

I check the Network forum, but did not find more information than here. Our servers are NT 4.0 and NT 5.0. This morning I checked them by using tracert command. Only two of them can be found, and they have different IP address(like 207.188.196.99) from checking inside company's network(like 10.0.0.99). So I think the result I got from home is external IP address, right? Does it mean that I have to register other servers via DNS to get the external IP address for them? Actually, the servers that I could not connect from home are bought recently. I know they have never been registered outside.

I am sorry for these basic questions. I do have no experience.