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Can not telnet to my Linux Box

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by stergios_nik

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Hello,

I have an NT network with 2 domains (A and B).

Domain A is a network of type: 192.168.5.x

Domain B is a network of type: 192.168.10.x

My linux Box is located in Domain A with an IP of type: 192.168.5.x

If I go to domain B and logon to a Win98 station with IP 192.168.10.x then I can not PING / Telnet my linux box at Domain A.

I do not know many things about linux configuration and probably something is missing.

Do you know what might cause this problem...?

Is it NTdomains?
IS it Linux Network configuration?
What troubleshooting steps do you suggest?

PS: The 2 NT domains are connected with Trust relationships (Domain A hosts the user accounts and authenticates domain B PCs)

Thanks in advance.

3 replies

by shanghai sam

Hi,
Basic problem is that u have network that consist of 2 subnets having addresses of range 192.168.5.x and 192.168.10.x.When u have subnets like this, there requires a device or m/c like router which will do address translation for communiocation between two subnets.In ur case ur two subnets can communicate with each other because u have installed NETBEUI protocol with tcp/ip protocol.NETBEUI protocol does not understand ip address and communicate with netbios name i.e computer name.If want to check this just ping from win98 m/c in Domain B to any m/c in Domain A.U will not get any response.But u still can browswe the domain A network.Now linux m/c does not work with NETBEUI protocol.Thats why U cannot ping or telnet from Domain B to linux m/c.
To resolve this problem.These r my solution
i)U have apply same ip range to all m/c's in ur network i.e either 192.168.5.x or 192.168.10.x.But if have large no of m/c's in ur network this work will be very teideious.
ii)U can put a machine as static router.
Here u have install NT AS OS and two LAN cards.
On one lan card give ip address 192.168.5.x and other LAN card 192.168.10.x.Now on first lan card put ip address of second lan card as dedfault gateway.And for secand lan card put ip address of first lan card as default gateway.Now go to tcp/ip protocol properties of each lan card and enable IP FROWARDING. Now on each m/c in Domain A network put ip address of lan card1 as default gateway.And for Domain B m/c'sput ip address of lan card2 as default gateway.Now ping the the linux m/c from Domain B.
If following configuration does not work try with 2 m/c's working asrouter on each side.
iii)Purchase new router and configure according to ur network.
Still any confusion/problems contact me by e-mail avi_mohod@indiatimes.com
avi.

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