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连接到主机 xx.xx.xx.xx 端口 22：连接超时

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连接到主机 xx.xx.xx.xx 端口 22：连接超时

我正在尝试 SSH 到我的服务器。当我使用以下命令检查时，SSH 服务处于活动状态

sudo service ssh status

此外，当我执行 netstat -nat | grep 22 时，我得到了

tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp        0      0 xx.xx.xx.xx:22       xx.xx.xx.xx:54197    ESTABLISHED
tcp6       0      0 :::22                   :::*                    LISTEN

我在终端上运行以下命令：

ssh [email protected]

我收到以下错误

ssh: connect to host xx.xx.xx.xx port 22: Connection timed out

我还通过 iptables 限制了对我的服务器的访问。当我输入 iptables -L 时，我得到以下几行：

Chain INPUT (policy DROP)
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh
ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED
ACCEPT     all  --  anywhere             anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  x.x.x.x              anywhere
ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh

Chain FORWARD (policy DROP)
target     prot opt source               destination

Chain OUTPUT (policy DROP)
target     prot opt source               destination
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     all  --  anywhere             x.x.x.x              
ACCEPT     tcp  --  anywhere             anywhere             tcp spt:ssh
ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED
ACCEPT     tcp  --  anywhere             anywhere             tcp spt:ssh
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh
ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED

我完全不知道该如何解决这个问题。有人能帮我吗？

问候，凯文

答案1

可能是您未将 SSH 配置文件中的“PermitRootLogin”设置为接受使用 root 帐户的连接。在配置文件中（我的是 /etc/ssh/sshd_config），此设置默认为“no”（出于安全原因）。尝试使用具有 SSH 访问权限的其他用户帐户进行连接，或尝试将 PermitRootLogin 更改为“yes”，然后查看会发生什么。

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