I have network-manager installed to replace the utilization of /etc/networking, which is the default interface to configure networks.
However, I was reading this guide on modifying the sysctl.conf file and have added many additional lines for TCP/IP tweaks and recommended settings. I’m uncertain if the settings will impact the network-manager or only reach to /etc/network.
Then I was testing out the settings and discovered that I cannot ping to an external network.
Why is the settings not working?
chech out ur problem here.......
http://askubuntu.com/questions/174200/server-wont-ping-outside-network+
Were you able to ping these IPs before changes?
I have no idea, it was given to me on a guide I read about tweaking sysctl.conf.
U CAN TRY videos available on youtube for ur related question
Sounds like problem with IPv6 and IPv4 config/compatibility
Linux disable or drop / block ping packets all together
http://www.cyberciti.biz/faq/howto-drop-block-all-ping-packets/
To enable ping request type the command:
echo "0" > /proc/sys/net/ipv4/icmp_echo_ignore_all
perhaps to enable Enable packet forwarding via the sysctl.conf and /or via /etc/sysconfig/network
OpenVZ Server Can Not Ping?
http://www.meatleasing.com/openvz-server-ping-the-world/index.html
Sorry, but none of the links helped and I'm not sure why do I need to use those commands. I can ping addresses internally, such as google or yahoo.com but with addresses like: 216.148.218.195, I cannot ping them.
perhaps you have to delete some lines sysctl.conf.
Multiple NICs, single IP
http://ubuntuforums.org/showpost.php?p=8763893&postcount=3
I'm using Network Manager to connect to my wireless network, the network interfaces will be ignored. I have deleted some invalid keys identified on boot.