Debian
Debian 無頭伺服器連接到乙太網介面 ~50% 的封包遺失訪問網際網路
在過去的三天裡，我已經針對此問題進行了一系列故障排除。以下是我迄今為止所做的測試和觀察：
- 與我的伺服器的 Internet 連接不斷下降（請參閱下面的 ping）
- 伺服器有靜態地址且地址超出路由器的 DCHP 範圍
- 調製解調器是用於橋接模式的調製解調器/路由器。（現在恢復出廠設置3次）
- 我嘗試了 3 個不同的路由器 = 相同的結果 50% 丟包
- 我嘗試了兩個不同的物理介面 = 相同的 50% 丟包率
- 我嘗試了 3 種不同的乙太網電纜 = 相同的 50% 丟包率
- 我同時停止了伺服器上的許多程序（請參見下面的列表）
- 我禁用了我的防火牆
- 我從客戶端到 LAN 上伺服器的連接總是 100% 收到數據包
- 將伺服器直接連接到調製解調器顯示在 ping 8.8.8.8 時沒有丟包
- 發生 Internet 連接失敗時，dmesg 或 journalctl 中沒有異常
- 在我的筆記型電腦而不是伺服器中連接乙太網電纜導致筆記型電腦在 ping 8.8.8.8 時不會失去數據包
- 從 USB 驅動器啟動 Arch Linux 對我來說網際網路沒有任何問題。
我當時認為這一定是與軟體相關的問題。但現在我被困住了。這是我的ping 結果。每次我在下面列出的不同環境下執行它時基本相同。
➜ ~ ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_seq=1 ttl=119 time=14.5 ms 64 bytes from 8.8.8.8: icmp_seq=2 ttl=119 time=14.4 ms 64 bytes from 8.8.8.8: icmp_seq=3 ttl=119 time=13.9 ms 64 bytes from 8.8.8.8: icmp_seq=4 ttl=119 time=14.9 ms 64 bytes from 8.8.8.8: icmp_seq=5 ttl=119 time=16.1 ms 64 bytes from 8.8.8.8: icmp_seq=6 ttl=119 time=14.8 ms 64 bytes from 8.8.8.8: icmp_seq=7 ttl=119 time=15.2 ms 64 bytes from 8.8.8.8: icmp_seq=8 ttl=119 time=15.5 ms 64 bytes from 8.8.8.8: icmp_seq=9 ttl=119 time=2052 ms 64 bytes from 8.8.8.8: icmp_seq=10 ttl=119 time=1024 ms 64 bytes from 8.8.8.8: icmp_seq=11 ttl=119 time=16.7 ms 64 bytes from 8.8.8.8: icmp_seq=12 ttl=119 time=22.7 ms 64 bytes from 8.8.8.8: icmp_seq=13 ttl=119 time=19.5 ms 64 bytes from 8.8.8.8: icmp_seq=14 ttl=119 time=23.0 ms 64 bytes from 8.8.8.8: icmp_seq=15 ttl=119 time=12.6 ms 64 bytes from 8.8.8.8: icmp_seq=16 ttl=119 time=18.0 ms 64 bytes from 8.8.8.8: icmp_seq=17 ttl=119 time=26.0 ms 64 bytes from 8.8.8.8: icmp_seq=18 ttl=119 time=18.8 ms 64 bytes from 8.8.8.8: icmp_seq=31 ttl=119 time=24.8 ms 64 bytes from 8.8.8.8: icmp_seq=32 ttl=119 time=13.9 ms 64 bytes from 8.8.8.8: icmp_seq=33 ttl=119 time=19.0 ms 64 bytes from 8.8.8.8: icmp_seq=34 ttl=119 time=15.9 ms 64 bytes from 8.8.8.8: icmp_seq=35 ttl=119 time=15.6 ms 64 bytes from 8.8.8.8: icmp_seq=36 ttl=119 time=14.6 ms 64 bytes from 8.8.8.8: icmp_seq=37 ttl=119 time=12.8 ms 64 bytes from 8.8.8.8: icmp_seq=38 ttl=119 time=14.7 ms 64 bytes from 8.8.8.8: icmp_seq=39 ttl=119 time=14.7 ms 64 bytes from 8.8.8.8: icmp_seq=40 ttl=119 time=16.0 ms 64 bytes from 8.8.8.8: icmp_seq=41 ttl=119 time=15.2 ms 64 bytes from 8.8.8.8: icmp_seq=42 ttl=119 time=15.8 ms 64 bytes from 8.8.8.8: icmp_seq=43 ttl=119 time=33.0 ms 64 bytes from 8.8.8.8: icmp_seq=44 ttl=119 time=21.1 ms 64 bytes from 8.8.8.8: icmp_seq=45 ttl=119 time=19.4 ms 64 bytes from 8.8.8.8: icmp_seq=46 ttl=119 time=15.0 ms 64 bytes from 8.8.8.8: icmp_seq=47 ttl=119 time=30.3 ms 64 bytes from 8.8.8.8: icmp_seq=48 ttl=119 time=15.8 ms 64 bytes from 8.8.8.8: icmp_seq=49 ttl=119 time=14.0 ms 64 bytes from 8.8.8.8: icmp_seq=50 ttl=119 time=12.9 ms 64 bytes from 8.8.8.8: icmp_seq=51 ttl=119 time=16.1 ms 64 bytes from 8.8.8.8: icmp_seq=52 ttl=119 time=14.3 ms 64 bytes from 8.8.8.8: icmp_seq=53 ttl=119 time=15.8 ms 64 bytes from 8.8.8.8: icmp_seq=54 ttl=119 time=14.4 ms 64 bytes from 8.8.8.8: icmp_seq=55 ttl=119 time=15.1 ms 64 bytes from 8.8.8.8: icmp_seq=56 ttl=119 time=20.4 ms 64 bytes from 8.8.8.8: icmp_seq=57 ttl=119 time=13.9 ms 64 bytes from 8.8.8.8: icmp_seq=58 ttl=119 time=15.5 ms 64 bytes from 8.8.8.8: icmp_seq=59 ttl=119 time=16.1 ms 64 bytes from 8.8.8.8: icmp_seq=60 ttl=119 time=14.5 ms 64 bytes from 8.8.8.8: icmp_seq=61 ttl=119 time=14.5 ms 64 bytes from 8.8.8.8: icmp_seq=62 ttl=119 time=13.5 ms 64 bytes from 8.8.8.8: icmp_seq=63 ttl=119 time=14.9 ms 64 bytes from 8.8.8.8: icmp_seq=64 ttl=119 time=16.1 ms 64 bytes from 8.8.8.8: icmp_seq=65 ttl=119 time=16.3 ms 64 bytes from 8.8.8.8: icmp_seq=66 ttl=119 time=14.0 ms 64 bytes from 8.8.8.8: icmp_seq=85 ttl=119 time=2080 ms 64 bytes from 8.8.8.8: icmp_seq=86 ttl=119 time=1056 ms 64 bytes from 8.8.8.8: icmp_seq=87 ttl=119 time=32.5 ms 64 bytes from 8.8.8.8: icmp_seq=88 ttl=119 time=22.6 ms 64 bytes from 8.8.8.8: icmp_seq=89 ttl=119 time=15.3 ms 64 bytes from 8.8.8.8: icmp_seq=90 ttl=119 time=12.9 ms 64 bytes from 8.8.8.8: icmp_seq=91 ttl=119 time=14.7 ms 64 bytes from 8.8.8.8: icmp_seq=92 ttl=119 time=15.2 ms 64 bytes from 8.8.8.8: icmp_seq=93 ttl=119 time=15.7 ms 64 bytes from 8.8.8.8: icmp_seq=94 ttl=119 time=17.5 ms 64 bytes from 8.8.8.8: icmp_seq=95 ttl=119 time=15.1 ms 64 bytes from 8.8.8.8: icmp_seq=117 ttl=119 time=16.6 ms 64 bytes from 8.8.8.8: icmp_seq=118 ttl=119 time=13.0 ms 64 bytes from 8.8.8.8: icmp_seq=119 ttl=119 time=13.6 ms 64 bytes from 8.8.8.8: icmp_seq=120 ttl=119 time=11.8 ms 64 bytes from 8.8.8.8: icmp_seq=121 ttl=119 time=13.6 ms 64 bytes from 8.8.8.8: icmp_seq=122 ttl=119 time=13.6 ms 64 bytes from 8.8.8.8: icmp_seq=123 ttl=119 time=13.5 ms 64 bytes from 8.8.8.8: icmp_seq=124 ttl=119 time=27.5 ms 64 bytes from 8.8.8.8: icmp_seq=149 ttl=119 time=960 ms 64 bytes from 8.8.8.8: icmp_seq=150 ttl=119 time=14.6 ms 64 bytes from 8.8.8.8: icmp_seq=151 ttl=119 time=15.9 ms 64 bytes from 8.8.8.8: icmp_seq=152 ttl=119 time=15.6 ms 64 bytes from 8.8.8.8: icmp_seq=153 ttl=119 time=26.9 ms 64 bytes from 8.8.8.8: icmp_seq=154 ttl=119 time=13.6 ms 64 bytes from 8.8.8.8: icmp_seq=155 ttl=119 time=15.5 ms 64 bytes from 8.8.8.8: icmp_seq=156 ttl=119 time=15.2 ms 64 bytes from 8.8.8.8: icmp_seq=157 ttl=119 time=16.0 ms 64 bytes from 8.8.8.8: icmp_seq=164 ttl=119 time=14.1 ms 64 bytes from 8.8.8.8: icmp_seq=165 ttl=119 time=15.2 ms 64 bytes from 8.8.8.8: icmp_seq=166 ttl=119 time=21.3 ms 64 bytes from 8.8.8.8: icmp_seq=167 ttl=119 time=14.7 ms 64 bytes from 8.8.8.8: icmp_seq=168 ttl=119 time=15.4 ms 64 bytes from 8.8.8.8: icmp_seq=169 ttl=119 time=16.1 ms 64 bytes from 8.8.8.8: icmp_seq=170 ttl=119 time=14.3 ms 64 bytes from 8.8.8.8: icmp_seq=171 ttl=119 time=15.9 ms 64 bytes from 8.8.8.8: icmp_seq=172 ttl=119 time=20.3 ms 64 bytes from 8.8.8.8: icmp_seq=173 ttl=119 time=16.8 ms 64 bytes from 8.8.8.8: icmp_seq=174 ttl=119 time=16.1 ms 64 bytes from 8.8.8.8: icmp_seq=175 ttl=119 time=14.0 ms 64 bytes from 8.8.8.8: icmp_seq=176 ttl=119 time=17.3 ms 64 bytes from 8.8.8.8: icmp_seq=177 ttl=119 time=16.7 ms 64 bytes from 8.8.8.8: icmp_seq=178 ttl=119 time=21.3 ms 64 bytes from 8.8.8.8: icmp_seq=179 ttl=119 time=14.4 ms 64 bytes from 8.8.8.8: icmp_seq=180 ttl=119 time=17.6 ms 64 bytes from 8.8.8.8: icmp_seq=181 ttl=119 time=13.7 ms 64 bytes from 8.8.8.8: icmp_seq=182 ttl=119 time=23.8 ms 64 bytes from 8.8.8.8: icmp_seq=183 ttl=119 time=15.4 ms 64 bytes from 8.8.8.8: icmp_seq=184 ttl=119 time=14.7 ms 64 bytes from 8.8.8.8: icmp_seq=185 ttl=119 time=20.2 ms 64 bytes from 8.8.8.8: icmp_seq=186 ttl=119 time=14.5 ms 64 bytes from 8.8.8.8: icmp_seq=187 ttl=119 time=12.8 ms 64 bytes from 8.8.8.8: icmp_seq=188 ttl=119 time=15.4 ms 64 bytes from 8.8.8.8: icmp_seq=189 ttl=119 time=14.8 ms 64 bytes from 8.8.8.8: icmp_seq=190 ttl=119 time=16.1 ms 64 bytes from 8.8.8.8: icmp_seq=191 ttl=119 time=14.1 ms 64 bytes from 8.8.8.8: icmp_seq=195 ttl=119 time=320 ms 64 bytes from 8.8.8.8: icmp_seq=196 ttl=119 time=13.5 ms 64 bytes from 8.8.8.8: icmp_seq=197 ttl=119 time=14.5 ms 64 bytes from 8.8.8.8: icmp_seq=198 ttl=119 time=15.5 ms 64 bytes from 8.8.8.8: icmp_seq=199 ttl=119 time=15.0 ms 64 bytes from 8.8.8.8: icmp_seq=200 ttl=119 time=13.1 ms 64 bytes from 8.8.8.8: icmp_seq=201 ttl=119 time=17.9 ms 64 bytes from 8.8.8.8: icmp_seq=202 ttl=119 time=15.6 ms 64 bytes from 8.8.8.8: icmp_seq=203 ttl=119 time=13.2 ms 64 bytes from 8.8.8.8: icmp_seq=225 ttl=119 time=1056 ms 64 bytes from 8.8.8.8: icmp_seq=226 ttl=119 time=32.5 ms 64 bytes from 8.8.8.8: icmp_seq=227 ttl=119 time=15.5 ms 64 bytes from 8.8.8.8: icmp_seq=228 ttl=119 time=13.6 ms 64 bytes from 8.8.8.8: icmp_seq=229 ttl=119 time=15.7 ms 64 bytes from 8.8.8.8: icmp_seq=230 ttl=119 time=21.7 ms 64 bytes from 8.8.8.8: icmp_seq=231 ttl=119 time=16.9 ms 64 bytes from 8.8.8.8: icmp_seq=232 ttl=119 time=13.5 ms 64 bytes from 8.8.8.8: icmp_seq=233 ttl=119 time=14.5 ms ^C --- 8.8.8.8 ping statistics --- 248 packets transmitted, 128 received, 48.3871% packet loss, time 1216ms rtt min/avg/max/mdev = 11.806/82.526/2080.231/306.259 ms, pipe 3兩個traceroute背靠背執行
➜ ~ traceroute 8.8.8.8 traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets 1 * * * 2 My WAN IP.mc.videotron.ca (My WAN IP) 19.047 ms 10.699 ms 19.035 ms 3 10.170.183.146 (10.170.183.146) 20.538 ms 21.036 ms 21.203 ms 4 72.14.205.46 (72.14.205.46) 20.269 ms 20.188 ms 20.189 ms 5 108.170.251.17 (108.170.251.17) 20.355 ms 108.170.251.33 (108.170.251.33) 20.149 ms 108.170.251.17 (108.170.251.17) 20.134 ms 6 108.170.231.63 (108.170.231.63) 21.359 ms 108.170.231.61 (108.170.231.61) 16.538 ms 108.170.231.63 (108.170.231.63) 16.186 ms 7 dns.google (8.8.8.8) 16.761 ms 15.483 ms 15.866 ms ➜ ~ traceroute 8.8.8.8 traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets 1 * * * 2 * * * 3 * * * 4 * * * 5 * * * 6 * * * 7 * * * 8 * * * 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * dns.google (8.8.8.8)/etc/網路/介面
➜ ~ cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). #source /etc/network/interfaces.d/* # The loopback network interface #auto lo #iface lo inet loopback # The primary network interface #allow-hotplug enx00e04c6802a2 auto lo br0 iface lo inet loopback auto enp5s0 iface enp5s0 inet manual iface br0 inet static address 192.168.3.104 netmask 255.255.255.0 gateway 192.168.3.1 bridge_ports enp5s0 bridge_stp off bridge_fd 0 bridge_maxwait 0 post-up iptables-restore < /etc/iptables.up.rules謝謝你的幫助
編輯 1
➜ ~ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP mode DEFAULT group default qlen 1000 link/ether 70:85:c2:da:2a:87 brd ff:ff:ff:ff:ff:ff 3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 70:85:c2:da:2a:87 brd ff:ff:ff:ff:ff:ff 4: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1420 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/none ➜ ~ ip -br address lo UNKNOWN 127.0.0.1/8 ::1/128 enp5s0 UP br0 UP 192.168.3.104/24 fe80::7285:c2ff:feda:2a87/64 wg0 UNKNOWN 192.168.3.1/24 ➜ ~ ip route; default via 192.168.3.1 dev br0 onlink 103.83.20.3 dev wg0 scope link 103.83.20.4 dev wg0 scope link 169.254.0.0/16 dev br0 scope link metric 1000 192.168.3.0/24 dev br0 proto kernel scope link src 192.168.3.104 192.168.3.0/24 dev wg0 proto kernel scope link src 192.168.3.1 ➜ ~ ip neigh 192.168.3.126 dev br0 lladdr 04:6c:59:f6:a0:3b REACHABLE 192.168.3.164 dev br0 lladdr be:95:3a:fc:bf:03 STALE [PUBLIC IP] dev br0 lladdr c4:04:15:10:b1:bd STALE 192.168.3.127 dev br0 lladdr 4c:3b:df:7f:c6:03 STALE 192.168.3.1 dev br0 lladdr c4:04:15:10:b1:bd REACHABLE 192.168.3.125 dev br0 lladdr 0c:c4:13:18:a4:c5 STALE 192.168.3.144 dev br0 lladdr b8:27:eb:28:4a:98 REACHABLE ➜ ~ ip rule 0: from all lookup local 32766: from all lookup main 32767: from all lookup default編輯 2 @AB 是對的。我忘了提到我一直在執行 VPN 伺服器（Wireguard），這確實是問題所在。
我終於禁用了我的 Wireguard 伺服器
systemctl disable wg-quick@wg0 && systemctl stop wg-quick@wg0，直到我花時間調查它出了什麼問題並且它成功了。