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Old 07-10-2006, 02:43 PM   #1
Asagath
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Registered: Dec 2004
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Exclamation Communication problem on red hat 7.2


I am using a red hat 7.2 on a server and I am having problems communicating it with the other elements on the net. I can ping most of the other servers (not all of them) and I can't establish a telnet sesion to or from that server. The IP configuration looks right (IP address and netmask).

Does anybody have any idea of the exact correct steps to configure a net card in order to solve this problem?? My job depend on this

Thanks

Jaime Cardona
 
Old 07-10-2006, 11:54 PM   #2
Elomis
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Further and Better Particulars

Hi Mate,

You haven't really provided any details as to the network, just "I have some stuff that can't see some other stuff but can see some other stuff again". In order to help you we need some actual details of what is going on, what sort of network is it? what's between the boxes you can't ping and the box you are pinging from? switches? routers? hubs? farm animals?

Give us some details and we'll help you out.
 
Old 07-11-2006, 08:55 AM   #3
Asagath
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Clarifying

You are right man, perhaps I forget to givo you more information... well, as I said, I am working in a server using red hat 7.2, there's a switch conecting my server with the other servers (I don't know what kind of switch) there are 3 kind of servers in my net, ones for signaling, ones for billing and the others are the ones who controll the calls (my server is one of this) (yes it have to deal with telephony). I can ping all those servers, except for the one who's in charge of billing. Also, I can't establish a telnet (or ssh or rsh) session from or to my server. As for now, that's all that I remember, I'll appreciate any help
 
Old 07-11-2006, 10:08 AM   #4
redhat143
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Registered: Jul 2006
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First of all let me ask onething.

Is it legal to ssh or telnet the other servers in your office.Or you are the admin and you cant have an active ssh or telnet session between the servers??

If its not legal then what I think is there is a firewall at the other server.When iptables are set to drop request from an IP range you can not even ping.If this is the case u better dont do that.

Whats the reason you want to connect these servers?? Are the other servers also running RH 7.2??

Can you plz mention the Ip ranges of these machines??
Also check out /etc/hosts.deny file at the destination machine.

Last edited by redhat143; 07-11-2006 at 10:12 AM.
 
Old 07-11-2006, 01:45 PM   #5
Asagath
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Clarifying again

in my office there's no politic agains doing telnet onto other servers, I am hundred percent sure there's no firewall, I am just doing that in order to check communication between my server.

I think that I just found the error, but still can't fix it. The hardware address (MAC) of eth0 is FF.FF.FF.FF.FF.FF and I believe that this is wrong, I guess that that interface is damaged but, since I am a total newbie in Linux, I couldn't bring up eth1 (yes, I have 2 interfaces in my server), I tried ifconfig eth1, but it said that the device was not found, I also tried adding a file named ifcfg-eth1 in /etc/sysconfig/networ-scripts but it was never recognized.

Well, as for now that's all the additional information that I have... so "help, I need somebody's help..."
 
Old 07-13-2006, 12:22 PM   #6
Asagath
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Me again

Ok, I am almost sure that the network cards are broken, but I have another problem, I just installed a new network card, but I couldn't make it work, what are the usual steps to install a network card on Red Hat 7.2?
 
Old 07-14-2006, 12:11 PM   #7
Asagath
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Thumbs up Job done

Finally I get to solve this problem, not only the network cards where broken, it looks like the whole main board was broken, so all I did was changing it and my server started working just fine. Thanks anyway
 
  


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