Basically, I have a PC having problems. Let's call it POO.
POO is a pc running Gentoo Linux, with KDE. It is quite freshly setup on an old hardware. So far I do not notice it has other problems, until now.
There are mainly two problems.
- When I
ssh 220.127.116.11(another Gentoo machine, HOME, in another network) from POO, it connects without problems. But after a while, the connection breaks with the error
packet_write_wait: Connection to 18.104.22.168: Broken pipe.
I suspect if the HOME's network's router is blocking the SSH connection, or the POO's network's router is blocking the outgoing traffic.
Then I setup two more machines in the same network of POO, namely an Android JuiceSSH MOBI and Window 7 PuTTY SSH WIN. Both use SSH to connect to HOME, and issue the commend
ping -i 10 -D www.gentoo.org at HOME. Both tested for up to 300 packets and gets 0% packet loss!
- When I issue the commend
ping -i 10 -D www.gentoo.orgat POO, I get around 50% packet loss. The lost packets are not sequential. They are randomly occur in between successful packets. (Note that I am issuing ping from POO solely. If I SSH to HOME and issue the ping from there, it gets the
Broken pipeerror as well.)
I also suspect that the
iptables in POO is blocking the traffic. But when I check
iptables -L -n -v, there is no rule! To remove this concern, I
/etc/init.d/iptables save and
/etc/init.d/iptables stop. But the same
Broken pipe and
packet loss problems still occur.
It is quite sure that the POO pc is having problems. But how to determine which part is having the problem? The hardware network card or the software configuration? By any way I can further investigate into the problem?
Sorry to add, I forgot to mention there is a third problem:
- Sometimes, when I do
ping -i 10 -D www.gentoo.org, it returns the error
ping: unknown host www.gentoo.org. It is so weird that it only sometimes return this ping error.