Ping: work in one direction only

Question

I have a Windows LAN (Domain). Also, 2 Ubuntu machines in the LAN: 22.04 and 20.04. I do ping IP 20.04->22.04 : it works fine When I do ping IP 22.04->20.04 : no responses.

What can be a reason?

Are you using the ip address or the hostname to ping? What are the firewall settings set to on both machines: sudo ufw status verbose? — mchid, Jun 23 '23 at 08:41
Yes, I do ping by IP. On both machines >sudo ufw status verbose Status: inactive — ZedZip, Jun 23 '23 at 08:48
I have made >ufw disable, >ufw enable and after it ping works ;-) — ZedZip, Jun 23 '23 at 08:58
Awesome. You should post this as an answer below. You will be able to mark your answer as the accepted answer after a couple of days, just to give other people a chance to answer as well. — mchid, Jun 23 '23 at 09:01

score 1 · Answer 1 · answered Jun 23 '23 at 08:37

1

Check the routes, maybe there is a network device which not allow the ping.

answered Jun 23 '23 at 08:37

HBtools

29

Please more details. What commands to use? – ZedZip Jun 23 '23 at 08:49
@ZedZip Like in this answer and also use traceroute. – mchid Jun 23 '23 at 08:59

score 0 · Answer 2 · answered Jun 23 '23 at 09:04

0

I have checked:

$sudo ufw status verbose

status:inactive Then I did:

$sudo ufw disable
$sudo ufw enable

And finally ping works <-> in both directions and also from other windows machines.

answered Jun 23 '23 at 09:04

ZedZip

207

Ping: work in one direction only

2 Answers2