![无法通过 127.0.0.1 连接到任何服务](https://linux22.com/image/1202649/%E6%97%A0%E6%B3%95%E9%80%9A%E8%BF%87%20127.0.0.1%20%E8%BF%9E%E6%8E%A5%E5%88%B0%E4%BB%BB%E4%BD%95%E6%9C%8D%E5%8A%A1.png)
我登录了一个我们几个月没碰过的 16.04 服务器,执行了操作apt-get upgrade
并重新启动了它。
现在无法通过 到达任何地点127.0.0.1
,例如
$ telnet 127.0.0.1 3308
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused
但是 localhost 可以工作,例如
$ telnet localhost 3308
Trying ::1...
Connected to localhost.
Escape character is '^]'.
_
$B9+/&0X???gbJ:< hDWfM5mysql_native_password
因此 IPv6 可以工作,但 IPv4 显然不行。问题是我有一堆服务尝试通过 IPv4 连接。
更多信息:
不,这和16.04升级问题不一样,网络访问不是问题。
ifconfig:
eth0 Link encap:Ethernet HWaddr f2:3c:91:e2:e9:e3
inet addr:139.*.*.* Bcast:139.*.*.* Mask:255.255.255.0
inet6 addr: fe80::*:*:*:*/64 Scope:Link
inet6 addr: 2a01:*::*:*:*:*/64 Scope:Global
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:420333 errors:0 dropped:0 overruns:0 frame:0
TX packets:427976 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:103142955 (103.1 MB) TX bytes:41541069 (41.5 MB)
eth0:1 Link encap:Ethernet HWaddr f2:3c:91:e2:e9:e3
inet addr:192.168.*.* Bcast:0.0.0.0 Mask:255.255.128.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:46250 errors:0 dropped:0 overruns:0 frame:0
TX packets:46250 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:48447261 (48.4 MB) TX bytes:48447261 (48.4 MB)
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.5.4.1 P-t-P:10.5.4.1 Mask:255.255.248.0
inet6 addr: fe80::fbaa:a6ee:9adf:f417/64 Scope:Link
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:7859 errors:0 dropped:0 overruns:0 frame:0
TX packets:5347 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:489368 (489.3 KB) TX bytes:1483636 (1.4 MB)
在 /etc/hosts 中:
127.0.0.1 localhost
127.0.1.1 hostname.my.domain hostname
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters