The ifconfig command shows more and more dropped packets in the RX section. So, there seem to be a problem to some packets arriving from the Internet to my server.
What kind of packets does this drop counter takes into account? Does it take all packets arriving, before reaching the iptables firewall, or after the packets have been accepted by iptables?
How to solve the situation so that the ipconfig drop packets counter stops to increase?
Useful troubleshooting infos
Since I don't know what my problem really is, feel free to ask me to complete this section if you think some other info would be needed.
eth0 Link encap:Ethernet HWaddr 00:cc:cc:cc:cc:cc inet adr:220.127.116.11 Bcast:18.104.22.168 Masque:255.255.255.0 adr inet6: fe80::21c:c0ff:feb9:829c/64 Scope:Lien adr inet6: 2001:a100:1:bbbb::1/64 Scope:Global UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:113264620 errors:0 dropped:2523 overruns:0 frame:0 TX packets:168526529 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:1000 RX bytes:59171827564 (55.1 GiB) TX bytes:223993117711 (208.6 GiB)
Note the "dropped:2523" in the RX section. This is the most important. This number is continuously increasing.
ip -4 route show
default via 22.214.171.124 dev eth0 126.96.36.199/24 dev eth0 proto kernel scope link src 188.8.131.52
ip -6 route show
2001:a100:1:bbbb::1/64 dev eth0 proto kernel metric 256 fe80::/64 dev eth0 proto kernel metric 256 default via 2001:a100:1:bbff:ff:ff:ff:ff dev eth0 metric 1024
munin graph of plugin if_err_eth0_day