Burak Tamtürk asked:
Recently I discovered that some pings sent to me were giving a
TTL error. When someone pings my computer, it shows a different
TTL value for every packet.
For example, ping.eu shows that:
--- PING 188.8.131.52 (184.108.40.206) 56(84) bytes of data. --- 64 bytes from 220.127.116.11: icmp_req=1 ttl=112 time=78.7 ms 64 bytes from 18.104.22.168: icmp_req=2 ttl=17 time=78.8 ms 64 bytes from 22.214.171.124: icmp_req=3 ttl=206 time=78.7 ms 64 bytes from 126.96.36.199: icmp_req=4 ttl=212 time=78.7 ms --- 188.8.131.52 ping statistics --- packets transmitted 4 received 4 packet loss 0 % time 3002 ms --- Round Trip Time (rtt) --- min 78.734 ms avg 78.782 ms max 78.861 ms mdev 0.050 ms
(And sometimes I see
request timed out and
TTL expired errors as well.)
As you can see, every packet has a different
TTL value. Is that a problem? If it is, is it caused by my network configuration, or is it caused by my ISP? And what can I do in this situation?
If it matters, I use a
WRT54GH home router with
ZyXEL ADLS bridge modem, connecting three Windows computers. You can try to ping me at my IP address,
I got similar results pinging your IP address from the US.
When I pinged 184.108.40.206, the next hop upstream from you, which I presume is your ISP’s equipment, I got back a TTL of 243 every time. This is obviously wrong.
The next hop upstream from that acted reasonably, with a TTL of 54 every time.
My strong suspicion based on these results is that your ISP is mangling the packets.
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.