topic Re: Linux 7.3 Not able to connect in Operating System - Linux

Linux 7.3 Not able to connect

Sunil Sharma_1 — Wed, 20 Aug 2003 06:31:52 GMT

Hi,
I am facing a strange problem, i installed Red hat Linux 7.3 on 2 Compaq Prolient server, these server are able to talk each other but no other node (Windows/Sun) able to connect or reach to these nodes(nither ping nor telnet).

It's very urgent ..
please help...
Sunil

Re: Linux 7.3 Not able to connect

Claudio Cilloni — Wed, 20 Aug 2003 06:35:34 GMT

the other windows/sun nodes are on the same subnet? if no, the gateway is set correctly on the linux machines?

Re: Linux 7.3 Not able to connect

Massimo Bianchi — Wed, 20 Aug 2003 06:42:25 GMT

Hi Sunil,
first thing to check:

- ip configuration/gateway configuration
- firewall configuration
- on switch/router: vlan configuration

Massimo

Re: Linux 7.3 Not able to connect

Sunil Sharma_1 — Wed, 20 Aug 2003 06:57:45 GMT

Hi,
No Firewall
all are in same subnet

Sunil

Re: Linux 7.3 Not able to connect

Vitaly Karasik_1 — Wed, 20 Aug 2003 07:45:57 GMT

- which driver do you use? if you have Broadcom gigabit chip, try to dw from HP site and install bcm5700 driver instead of tg3

- could you please send us output of ifconfig?

Vitaly

Re: Linux 7.3 Not able to connect

Stuart Browne — Wed, 20 Aug 2003 22:55:20 GMT

Routing tables from all boxes, 'ifconfig -a' from linux and sun boxes, and an 'ipconfig' from the windows boxes so we can see what's going on.

I'd also like to see the output of these two commands on the linux boxen:

iptables -nvL
ipcahisn -nvL

Atleast one of these should fail with errors.

Are you sure it isn't affected by tcp wrappers, and thus require correct entries in the /etc/hosts.{allow,deny} files, so the contents of them as well if you could.

You've also verified that they are all on the same PHYISCAL segment of the network?

Now, what service are you trying to connect to? Are you sure this service is running on the linux boxes?

Re: Linux 7.3 Not able to connect

Steven E. Protter — Thu, 21 Aug 2003 00:53:33 GMT

You need a test

As root, both boxes

service iptables stop

Test connectivity.

If it suddenly comes on, you are in the right ballpark, if not move on to other causes.

Same goes if ipchains if you are using that firewall.

sEP

Re: Linux 7.3 Not able to connect

Sunil Sharma_1 — Thu, 21 Aug 2003 03:48:55 GMT

Thanks to all of you.
My problem got resolved.

Sunil