Can't SSH / ping Linux box !!!

Linux and Unix-Like Linux
1

I have a linux box build11 which can be pinged from build18 (Windows) box. And we can only login to the box (using SSH) from build18 box. Plz help to characterize the problem, network, DNS, DHCP, etc (or whatever which I am unsure)

Any idea what may be the reason ? :confused:

Thanks in advance to all
Chirantan

2

more info please, like ping stats, traceroute....
check if you have any firewalls enabled on the linux box, post the output of "uname -a", etc.

3

ixca-cm-build11:~ # uname -a
Linux ixca-cm-build11 2.4.21-144-smp4G #1 SMP Fri Nov 14 00:07:01 UTC 2003 i686 i686 i386 GNU/Linux

E:\ >ping ixca-cm-build11

Pinging ixca-cm-build11.ixiacom.com [192.168.4.56] with 32 bytes of data:

Reply from 192.168.4.56: bytes=32 time<1ms TTL=64
Reply from 192.168.4.56: bytes=32 time<1ms TTL=64
Reply from 192.168.4.56: bytes=32 time<1ms TTL=64
Reply from 192.168.4.56: bytes=32 time<1ms TTL=64

Tracing route to ixca-cm-build11.ixiacom.com [192.168.4.56]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 10.205.26.1
2 1 ms <1 ms <1 ms ixin-ns.ixiacom.com [10.205.24.4]
3 * * * Request timed out.
4 1360 ms 1260 ms 1220 ms 10.200.0.1
5 * * * Request timed out.
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.

4

well, the traceroute apparently shows network issues, or filtered ICMP, or something else depending on your net config. Your network admin/ IT person is the best person to ask.

5

hi!
first check whether ICMP is set to 0 or 1 , u can check in /proc the icmp state value to 0 or 1, even u can check using the sysctl -a | grep icmp
and set the value to 0 so that the system is able to ping, now coming to the part of SSH, u can check whether SSH service is enabled(ps -e | grep sshd) if not start the service and also check whether the system is safegaurd with firewall