我的服务器无法连接到本地网络或互联网。
服务器无法 ping 通本地网络上的其他机器。尝试访问互联网失败。
从我的电脑上我可以 ping 本地 IP 192.168.2.1 和 8.8.8.8。
我可以使用 192.168.2.23 IP 地址的 ssh 连接到我的服务器。
ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: enp0s31f6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 6c:4b:90:a3:dc:d0 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.23/24 brd 192.168.2.255 scope global dynamic enp0s31f6
valid_lft 257944sec preferred_lft 257944sec
inet6 fe80::6e4b:90ff:fea3:dcd0/64 scope link
valid_lft forever preferred_lft forever
3: wlp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 98:2c:bc:e3:50:f8 brd ff:ff:ff:ff:ff:ff
4: br-8c5379765694: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:0c:8e:60:31 brd ff:ff:ff:ff:ff:ff
inet 172.24.0.1/16 brd 172.24.255.255 scope global br-8c5379765694
valid_lft forever preferred_lft forever
5: br-44cc32b7ce2f: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 02:42:5d:a8:01:63 brd ff:ff:ff:ff:ff:ff
inet 172.19.0.1/16 brd 172.19.255.255 scope global br-44cc32b7ce2f
valid_lft forever preferred_lft forever
inet6 fe80::42:5dff:fea8:163/64 scope link
valid_lft forever preferred_lft forever
6: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:18:1f:a5:14 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
7: br-5e82d16c5e19: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:54:02:25:66 brd ff:ff:ff:ff:ff:ff
inet 172.23.0.1/16 brd 172.23.255.255 scope global br-5e82d16c5e19
valid_lft forever preferred_lft forever
79: veth64b6284@if78: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br-44cc32b7ce2f state UP group default
link/ether e6:ca:08:af:bc:c9 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::e4ca:8ff:feaf:bcc9/64 scope link
valid_lft forever preferred_lft forever
Trace route
traceroute to 192.168.2.1 (192.168.2.1), 30 hops max, 60 byte packets
1 192.168.2.23 (192.168.2.23) 741.652 ms !H 741.585 ms !H 741.546 ms !H
route n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 enp0s31f6
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.19.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-44cc32b7ce2f
172.23.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-5e82d16c5e19
172.24.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-8c5379765694
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0 enp0s31f6
iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy DROP)
target prot opt source destination
DOCKER-USER all -- anywhere anywhere
DOCKER-ISOLATION-STAGE-1 all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
Chain DOCKER (4 references)
target prot opt source destination
ACCEPT tcp -- anywhere 172.19.0.2 tcp dpt:9091
Chain DOCKER-ISOLATION-STAGE-1 (1 references)
target prot opt source destination
DOCKER-ISOLATION-STAGE-2 all -- anywhere anywhere
DOCKER-ISOLATION-STAGE-2 all -- anywhere anywhere
DOCKER-ISOLATION-STAGE-2 all -- anywhere anywhere
DOCKER-ISOLATION-STAGE-2 all -- anywhere anywhere
RETURN all -- anywhere anywhere
Chain DOCKER-ISOLATION-STAGE-2 (4 references)
target prot opt source destination
DROP all -- anywhere anywhere
DROP all -- anywhere anywhere
DROP all -- anywhere anywhere
DROP all -- anywhere anywhere
RETURN all -- anywhere anywhere
Chain DOCKER-USER (1 references)
target prot opt source destination
RETURN all -- anywhere anywhere
我很感激有关解决此网络问题的建议。
编辑：
wget 8.8.8.8
--2024-03-08 19:52:58-- http://8.8.8.8/
Connecting to 8.8.8.8:80... failed: No route to host.
wget google.com
--2024-03-08 19:53:23-- http://google.com/
Resolving google.com (google.com)... failed: Temporary failure in name resolution.
cat /etc/resolv.conf
domain home
search home
nameserver 192.168.2.1
答案1
好吧，花了 4 个多小时解决这个问题，这真的很奇怪。
我激活了 WiFi 卡，但出现了相反的问题：我可以看到所有人，但网络内的任何人都看不到我。几分钟后，我再次失去连接。我用以太网卡重新测试，遇到了同样的问题：无法连接外部，但从内部，其他机器可以看到我。
我认为这可能是我的 ISP Bell GigaHub 路由器的问题，因为在它要求我恢复出厂设置之前，一切都正常。所以我删除了 DHCP 租约，我的 WiFi 连接获得了一个新的 IP，并且工作正常。所以，我想，好吧，很简单，我重新连接我的以太网卡，它再次获得 2.23 的 IP，但同样的问题又出现了。
因此，我强制路由器将 IP 地址设置为 2.123，然后一切又恢复正常。这或多或少与 IP 冲突的症状类似，只是我 100% 确定没有冲突。无论如何，IP 2.23 在我的网络上被禁止，我不知道为什么。