I work on my laptop and ssh into my desktop. I use a lot of key based authentication for many servers for work but recently I couldn't login because ssh would pick up and try all the keys and it stops trying before ultimately falling back to password based login. So right now I am using this command: ssh -X -o PubkeyAuthentication=no [email protected] #deskto

The issue is after sometime the desktop would just become unreachable from laptop. I won't be able to open its localhost through IP and today I tried ping'in it and found a weird thing. Instead of 192.168.1.4, it tries to ping 192.168.1.3 which I am sure is the root cause as it just can't reach 192.168.1.4 when its actually trying for 192.168.1.3

Ping command output:

ashfame@ashfame-xps:~$ ping 192.168.1.4
PING 192.168.1.4 (192.168.1.4) 56(84) bytes of data.
From 192.168.1.3 icmp_seq=1 Destination Host Unreachable
From 192.168.1.3 icmp_seq=2 Destination Host Unreachable
From 192.168.1.3 icmp_seq=3 Destination Host Unreachable
From 192.168.1.3 icmp_seq=4 Destination Host Unreachable
From 192.168.1.3 icmp_seq=5 Destination Host Unreachable
From 192.168.1.3 icmp_seq=6 Destination Host Unreachable
From 192.168.1.3 icmp_seq=7 Destination Host Unreachable
From 192.168.1.3 icmp_seq=8 Destination Host Unreachable
From 192.168.1.3 icmp_seq=9 Destination Host Unreachable
^C
--- 192.168.1.4 ping statistics ---
10 packets transmitted, 0 received, +9 errors, 100% packet loss, time 9047ms
pipe 3

Also the ping command message comes in multiple and not one by one. (izx answer's the weirdness I thought there was in ping command.)

I did check for desktop, its local IP is still the same, so something is going on in my laptop. Any ideas?

P.S. - Laptop runs Ubuntu 12.04 & Desktop runs Ubuntu 11.10

Laptop is connected through wifi to router and Desktop is connected through LAN to router.

Update: Even after setting up static IP leases in router settings, I again ran into this issue.