我正在通过 USB 连接到我的电脑的外部 SSD 驱动器上运行 22.04 LTS。
我完全无法从那里通过 SSH 连接到任何地方，而且我不知道为什么或者发生了什么（没有发生）。
我可以轻松地从 Windows 以及在普通联想机器上运行的 Ubuntu Server 22.04 LTS 进行连接。
我按照以下说明进行操作https://www.linuxcapable.com/install-enable-connect-to-ssh-on-ubuntu-22-04-lts/总结起来就是：
$ sudo apt install openssh-server -y (Install and enable OpenSSH Server)
$ sudo systemctl enable --now ssh
$ sudo systemctl status ssh:
> ● ssh.service - OpenBSD Secure Shell server
> Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: e>
> Active: active (running) since Tue 2022-06-28 23:36:54 CEST; 11h ago
> Docs: man:sshd(8)
> man:sshd_config(5) Main PID: 1004 (sshd)
> Tasks: 1 (limit: 18726)
> Memory: 3.1M
> CPU: 29ms
> CGroup: /system.slice/ssh.service
> └─1004 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups"
>
> jun 28 23:36:54 Hakuna systemd[1]: Starting OpenBSD Secure Shell
> server... jun 28 23:36:54 Hakuna sshd[1004]: Server listening on
> 0.0.0.0 port 22. jun 28 23:36:54 Hakuna sshd[1004]: Server listening on :: port 22. jun 28 23:36:54 Hakuna systemd[1]: Started OpenBSD
> Secure Shell server.
$ sudo ufw allow 22/tcp (allow port 22)
> sudo ufw status Status: active
>
> Til Handling Fra
> --- -------- ---
> 22/tcp ALLOW Anywhere
> 22/tcp (v6) ALLOW Anywhere (v6)
从现在开始，我应该能够 ssh 到我的 Pihole：
> ssh [email protected] ssh: connect to host 10.0.0.5 port 22: Connection timed out
任何帮助都值得感激，谢谢！
编辑：
从 Ubuntu 桌面到目标
$ 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
2: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether f8:75:a4:12:a0:88 brd ff:ff:ff:ff:ff:ff
3: wlp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 28:7f:cf:2b:9e:2c brd ff:ff:ff:ff:ff:ff
inet 10.0.0.215/24 brd 10.0.0.255 scope global dynamic noprefixroute wlp5s0
valid_lft 46015sec preferred_lft 46015sec
5: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:c5:ce:7d brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
6: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 500
link/none
inet 10.8.1.4/24 scope global tun0
valid_lft forever preferred_lft forever
11: wlx00c0cab15fb4: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state DORMANT group default qlen 1000
link/ether 00:c0:ca:b1:5f:b4 brd ff:ff:ff:ff:ff:ff
$ netstat -r -n
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 10.0.0.1 0.0.0.0 UG 0 0 0 wlp5s0
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 wlp5s0
10.8.1.0 0.0.0.0 255.255.255.0 U 0 0 0 tun0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 virbr0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
$ ping 10.0.0.5
PING 10.0.0.5 (10.0.0.5) 56(84) bytes of data.
^C
--- 10.0.0.5 ping statistics ---
188 packets transmitted, 0 received, 100% packet loss, time 191470ms
从 Ubuntu Server 22.04 到目标：
$ ping 10.0.0.5
PING 10.0.0.5 (10.0.0.5) 56(84) bytes of data.
64 bytes from 10.0.0.5: icmp_seq=1 ttl=64 time=33.9 ms
64 bytes from 10.0.0.5: icmp_seq=2 ttl=64 time=1.66 ms
64 bytes from 10.0.0.5: icmp_seq=3 ttl=64 time=1.94 ms
64 bytes from 10.0.0.5: icmp_seq=4 ttl=64 time=1.74 ms
64 bytes from 10.0.0.5: icmp_seq=5 ttl=64 time=13.8 ms
64 bytes from 10.0.0.5: icmp_seq=6 ttl=64 time=1.45 ms
64 bytes from 10.0.0.5: icmp_seq=7 ttl=64 time=1.68 ms
64 bytes from 10.0.0.5: icmp_seq=8 ttl=64 time=4.43 ms
64 bytes from 10.0.0.5: icmp_seq=9 ttl=64 time=1.53 ms
64 bytes from 10.0.0.5: icmp_seq=10 ttl=64 time=4.20 ms
64 bytes from 10.0.0.5: icmp_seq=11 ttl=64 time=5.94 ms
64 bytes from 10.0.0.5: icmp_seq=12 ttl=64 time=2.71 ms
^C
--- 10.0.0.5 ping statistics ---
12 packets transmitted, 12 received, 0% packet loss,
从通过以太网连接到路由器的 Pihole：
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
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether dc:a6:32:33:8c:bd brd ff:ff:ff:ff:ff:ff
inet 10.0.0.5/24 brd 10.0.0.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
$ netstat -r -n
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 10.0.0.1 0.0.0.0 UG 0 0 0 eth0
10.0.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
$ ping 10.0.0.10 (Pinging my 22.04 server)
PING 10.0.0.10 (10.0.0.10) 56(84) bytes of data.
64 bytes from 10.0.0.10: icmp_seq=1 ttl=64 time=1.63 ms
64 bytes from 10.0.0.10: icmp_seq=2 ttl=64 time=1.77 ms
64 bytes from 10.0.0.10: icmp_seq=3 ttl=64 time=1.72 ms
64 bytes from 10.0.0.10: icmp_seq=4 ttl=64 time=5.97 ms
64 bytes from 10.0.0.10: icmp_seq=5 ttl=64 time=0.870 ms
64 bytes from 10.0.0.10: icmp_seq=6 ttl=64 time=6.84 ms
^C
--- 10.0.0.10 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 13ms
rtt min/avg/max/mdev = 0.870/3.134/6.844/2.346 ms
我已经从我的服务器连接到我的 pihole。一切按计划进行。
答案1
禁用 NordVPN 就成功了。难以置信这么简单！
为了使 Ubuntu 与 NordVPN 一起工作，我对设置进行了以下更改：
> $ nordvpn whitelist add subnet 10.0.0.0/24
我还添加了我的 pihole DNS 服务器，如下：
> $ nordvpn set dns 10.0.0.5
现在，请允许我先对着枕头尖叫一会儿，然后再想办法感谢@user68186 提供了正确的答案。
再次感谢大家对我的帮助。这对我意义重大。