Ping doesn’t work, but I can browse through the internet

internetpingterminal

Pinging my default gateway is working properly and I can browse google and facebook in my browser. But, ping google.com and ping facebook.com on my terminal are not working.

PING google.com (216.58.220.46) 56(84) bytes of data.

Is just stuck. I also tried to reinstall resolvconf with sudo apt-get remove --purge resolvconf && sudo apt-get install --reinstall resolvconf. But still it doesn't work.

Best Answer

Outgoing ICMP (ping) is probably blocked by your firewall or gateway. That you are able to browse the Internet does not need ICMP (ping) to be working. You also might have a proxy configured which allows you to only surf the web.

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The ping uses the ICMP protocol and ICMP traffic may be blocked on your network. Try tracepath and traceroute using tcp/udp.

Tracroute using tcp:

    traceroute -T www.google.com

should work.

Also check if your firewall is blocking ICMP.

   #service iptables stop

OR.

  #systemctl stop firewalld.service

and then try again using ping

If the problem still exists then ICMP traffic is blocked on your network level and ask your network admin.

Some troubleshooting with ICMP on local system:

To check whether ICMP is enabled or disabled run the command:

 cat /proc/sys/net/ipv4/icmp_echo_ignore_all

The output is 0 or 1:

0 means that ICMP is enabled
1 means that ICMP is disabled

If it's disabled and you want to enable it:

change 1 to 0 in the above file

Or run the command:

iptables  -I  INPUT  -i  ech0  -p   icmp  -s  0/0  -d  0/0   -j  ACCEPT

But you check that you are connected to the internet even if ICMP is blocked by using:

   nc -vz google.com 80

Best Answer

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