Not able to ping serverA from serverB but able to ping server B from server A

[senthil_kumar_1]

Hi All,

I have two servers ServerA (HP-UX 11.31) and ServerB (HP-UX 10.20).

Not able to ping serverA from serverB but able to ping server B from server A.

How to solve this.

[Suraj K Sankari]

Hi,
>>Not able to ping serverA from serverB
Some time we are disable ping for security policy.

There are so many reasons 1st server A's ping might be disable.

or add route entry into server A .

Suraj

[senthil_kumar_1]

1)How to enable ping.

2)Route has been added in ServerA.

[Steven Schweda]

> I have two servers [...]

How much network hardware lies between them?

> Not able to [...]

This is not a useful problem description. It
does not show what you did. It does not show
what happened when you did it.

Is "ping" the only thing which fails? Do
normal services (Telnet, FTP, remsh, ...)
work?

> 2)Route has been added in ServerA.

Perhaps the psychics here know what your
routes are on both hosts, but some of us are
still in the dark. If we knew any of the
(secret?) IP addresses, then this might help:

netstat -rn


> How to solve this.

To start, provide even a little bit of useful
information?

[Suraj K Sankari]

HI,

Did you try telnet, ssh, rlogin ?
from server B to server A.
Ask from your network team they might block ping for server A.
Are you able to ping server A from other server from your network.

Suraj

[Raj D.]

Senthil,

> Not able to ping serverA(v3) from serverB(v1)

-Is it a new occurrence or was it working earlier.?
-Can you check ssh and telnet from ServerB to A.
- if telnet/ssh working and ping not, then the ping may be disabled in the firewall rule.
- Are they in same subnet and same network.
- check # netstat -rn for both the server.
- You will have some understanding after checking the above.



Hth,
Raj.

[Viveki]

Hi Senthil?

What are the OSs runnig on both the servers? Are both are HP-UX? If yes, are telnet, ftp etc are working? If working, contact your network team as in HP-UX the ping cannot be disabled without implementing utilities like IPfilter.

If telnet,ftp all are not working check the network configuration of server B. Also check are you able to ping other hosts in the server A's network. Or atleast you are able to ping the gateway.

[Hakki Aydin Ucar]

Hi ,
there is lots of answers, in the first place I thought ping blocked between these servers in a router but in one way, so you are able to ping in one direction but in other direction is not. Easy way to test to try other service like telnet, ftp .. And to be sure the path between servers:additionaly;

traceroute serverA
from serverB may be useful.

[Steven Schweda]

> [...] Do normal services (Telnet, FTP,
> remsh, ...) work?

> Did you try telnet, ssh, rlogin ? [...]

> -Can you check ssh and telnet from ServerB
> to A.

> [...] are telnet, ftp etc are working?

> [...] try other service like telnet, ftp ..


Is there some pool bet going on, where the
hundredth person to make this suggestion
wins some amazing prize? (At this rate, we
should have a winner soon.)

[senthil_kumar_1]

Hi All,

I am able to connect rlogin, telnet, FTP and SSH running in ServerA.

Actually now it is pinging, but taking about 2mins to get first icmp message. (May be it was pinging before also, that time i did not wait for more than 5 seconds).

Why it is taking some time to view the first ICMP message.