Questions about the topic - PING - TraceRoute

Chat
1

Hello everybody!

After I tested @stephdl his tool, I noticed that there are internet pages that you can not ping or the path following.

Why is that?
The site is quite normal in the network …

The PING protocol:

PING www.thw.de (77.87.229.85) 56(84) bytes of data.

--- www.thw.de ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 2999ms

The TraceRoute:

traceroute to www.thw.de (77.87.229.85), 30 hops max, 60 byte packets 1 fritz.box (192.168.2.1) 0.362 ms 0.797 ms 0.769 ms 2 62.155.242.84 (62.155.242.84) 17.385 ms 17.356 ms 17.333 ms 3 l-ea4-i.L.DE.NET.DTAG.DE (62.154.89.50) 27.385 ms 27.363 ms 27.340 ms 4 80.156.160.142 (80.156.160.142) 32.499 ms 32.477 ms 32.453 ms 5 cr-fra2-be11.x-win.dfn.de (188.1.144.222) 36.548 ms 36.527 ms 36.503 ms 6 * * * 7 * * * 8 * * * 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * *

Gerald

2

There are servers that chose to ignore ping or certain icmp requests.

For instance microsoft.com does not reply but www.microsoft.com does.

NethServer Firewall has a checkbox to accomplish the same.

1 Like
3

Ok, thank you I was not aware that one can suppress the ping response.

But that the TraceRoute anyway only * * * are indicated …

4

Hi,

for the traceroute it is the same as a ping. It is the ICMP protocol.
For Windows Systems: If you go in the Firewall configuration on your server and enable the “File and Printer Sharing (Echo Request - ICMPv4-In)”, your server will answer to Pings. If you disable the rule, it will not.

Ping (and also traceroute) are using the ICMP Protocol for the communication.
See Wiki for a good explenation: https://wikipedia.org/wiki/Traceroute

1 Like