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[ubuntu] Network goes down after a few minutes

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http://ubuntuforums.org – I have a server which I've been using at home (with no problems) for about a year. I recently upgraded the memory from 2x2GB to 2x4GB and updated the operating system to ubuntu server 11.10. Following this I have network problems with the server after a few minutes. For example, if I log in immediately after power up and run ping, I get the following output $ ping 10.1.1.1 64 bytes from 10.1.1.1: icmp_req=1 ttl=64 time=0.516 ms ... 64 bytes from 10.1.1.1: icmp_req=46 ttl=64 time=0.488 ms 64 bytes from 10.1.1.1: icmp_req=47 ttl=64 time=23789 ms from 10.1.1.11 icmp_seq=123 Destination Host Unre (Hardware)

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Submitted by xskl on 03/14/2012 – Made popular on 03/14/2012

Stories similar to [ubuntu] Network goes down after a few minutes

I've got a bit of a basic networking question here regarding ping.

When pinging a particular host on a completely different subnet, I get a response like this:

PING myhost.example.com (1.2.3.4) 56(84) bytes of data. 64 bytes from 1.2.3.4: icmp_req=1 ttl=115 time=1.88 ms 64 bytes from 1.2.3.4: icmp_req=2 ttl=115 time=1.66 ms 64 bytes from 1.2.3.4: icmp_req=3 ttl=115 time=1.96 ms 64 bytes from 1.2

Hi Friends,

I am using Fedora 16 32+ bit distro. How do I check if my dns service is working or not? I tried the following command based on my very little knowledge of network things. Below is the output to a few commands.

I can ping github.com but I can't ssh into it.

Why is the ping command outputing different results for these two instances?

$ ping -c 3 www.google.ca PING www-cctld.l.google.com (173.194.79.94) 56(84) bytes of data. 64 bytes from pb-in-f94.1e100.net (173.194.79.94): icmp_req=1 ttl=48 time=24.7 ms 64 bytes from pb-in-f94.1e100.net (173.194.79.94): icmp_req=2 ttl=48 time=24.5 ms 64 bytes from pb-in-f94.1e100.net (173.194.79.94): icmp_req=3 ttl=

I'm a little new to all the intricacies of Linux workings, so please bear with me if this is a dumb question.

I'm using Linux Mint 12 and I have an Asus PCE-N15 wireless card, which is running the Windows driver. Anyway, periodically I completely lose my connection, though Network Manager and iwconfig still claim that it's fine.

OpenVPN struggling 19 weeks 11 hours ago

I've got some problems with my OpenVPN setup.

The Setup: -> Ubuntu Server 12.04 -> Two active NIC's: eth0 (default): 192.168.1.0/24 eth1: x.x.x.x (external ip)

I've managed to get the routing to work so i can connect to the outside world with the eth1 NIC.

holmen@filserver:~$ ping -I eth1 -c 3 www.linuxquestions.org PING www.linuxquestions.org (75.126.162.205) from 192.168.1.2 eth1: 56(84) byte

OpenVPN struggling 19 weeks 11 hours ago

I've got some problems with my OpenVPN setup.

The Setup: -> Ubuntu Server 12.04 -> Two active NIC's: eth0 (default): 192.168.1.0/24 eth1: x.x.x.x (external ip)

I've managed to get the routing to work so i can connect to the outside world with the eth1 NIC.

holmen@filserver:~$ ping -I eth1 -c 3 www.linuxquestions.org PING www.linuxquestions.org (75.126.162.205) from 192.168.1.2 eth1: 56(84) byte

I'm running fedora 17 now for a few days.

ping with line numbers 44 weeks 3 days ago

Simple question: how to make ping on Linux to show line numbers in output?

I mean:

1 64 bytes from www.site.com (2.7.1.1): icmp_req=1 ttl=247 time=17.9 ms 2 64 bytes from www.site.com (2.7.1.1): icmp_req=2 ttl=247 time=16.1 ms 3 64 bytes from www.site.com (2.7.1.1): icmp_req=3 ttl=247 time=16.1 ms