ubuntu-nut-netclient，无法通过域名连接到服务端？

Question

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（网络环境非局域网，公网访问）
本人测试过：
1.debian-omv，nas系统上是可以通过域名连接上的，并且在后台是可以看到电源信息的，以及停电会自动关机。
2.windows通过WinNUT Configuration Tool，也可以自动关机。
3.Windows NUT Client也可以正确识别。

可就是不知道为何不能在ubuntu连接，很奇怪，到底需要如何操作?

服务端配置

```c
##############nut.conf##############
MODE=netserver

##############ups.conf##############
[ups]
driver = usbhid-ups
port = auto

##############upsd.conf##############
MAXAGE 15
MAXCONN 1024
LISTEN 0.0.0.0 3493
LISTEN 0:0:0:0:0:0:0:0 3493

##############upsd.users##############
[admin]
password = T3IR4AJKlKG3wSta
actions = set
actions = fsd
instcmds = ALL

[monmaster]
password = zLfnbUWNUnnK0xnQ
upsmon master

[Litigator2948]
password = 36C78jJ6b2jDNo8YfFCSpydyvLf79M6
upsmon slave

##############upsmon.conf##############
MONITOR ups 1 monmaster zLfnbUWNUnnK0xnQ master
MINSUPPLIES 1
SHUTDOWNCMD "/sbin/shutdown -h +0"
NOTIFYCMD "/sbin/upssched"
POLLFREQ 5
POLLFREQALERT 5
HOSTSYNC 15
DEADTIME 555
POWERDOWNFLAG /etc/killpower
NOTIFYFLAG ONLINE SYSLOG+WALL+EXEC
NOTIFYFLAG ONBATT SYSLOG+WALL+EXEC
NOTIFYFLAG LOWBATT SYSLOG+WALL+EXEC
NOTIFYFLAG COMMOK SYSLOG+WALL+EXEC
NOTIFYFLAG COMMBAD SYSLOG+WALL+EXEC
NOTIFYFLAG SHUTDOWN SYSLOG+WALL+EXEC
NOTIFYFLAG REPLBATT SYSLOG+WALL+EXEC
NOTIFYFLAG NOCOMM SYSLOG+WALL+EXEC
NOTIFYFLAG FSD SYSLOG+WALL+EXEC
RBWARNTIME 43200
NOCOMMWARNTIME 300
FINALDELAY 5


##############upssched.conf##############
CMDSCRIPT /usr/bin/upssched-cmd
PIPEFN /run/nut/upssched.pipe
LOCKFN /run/nut/upssched.lock
AT COMMOK * EXECUTE notify
AT COMMBAD * EXECUTE notify
AT REPLBATT * EXECUTE notify
AT NOCOMM * EXECUTE notify
AT FSD * EXECUTE forced-shutdown
AT NOPARENT * EXECUTE notify
AT SHUTDOWN * EXECUTE notify
AT ONLINE * CANCEL-TIMER shutdown
AT ONLINE * EXECUTE resume
AT ONBATT * START-TIMER shutdown 150 
AT ONBATT * EXECUTE shutdown-warning
AT LOWBATT * START-TIMER shutdown
AT LOWBATT * EXECUTE shutdown-warning

客户端配置

```c
##############upsmon.conf##############
MONITOR [e-mail] 1 Litigator2948 36C78jJ6b2jDNo8YfFCSpydyvLf79M slave
MINSUPPLIES 1
SHUTDOWNCMD "/sbin/shutdown -h +0"
NOTIFYCMD "/sbin/upssched"
POLLFREQ 5
POLLFREQALERT 5
HOSTSYNC 15
DEADTIME 555
POWERDOWNFLAG /etc/killpower
NOTIFYFLAG ONLINE SYSLOG+WALL+EXEC
NOTIFYFLAG ONBATT SYSLOG+WALL+EXEC
NOTIFYFLAG LOWBATT SYSLOG+WALL+EXEC
NOTIFYFLAG COMMOK SYSLOG+WALL+EXEC
NOTIFYFLAG COMMBAD SYSLOG+WALL+EXEC
NOTIFYFLAG SHUTDOWN SYSLOG+WALL+EXEC
NOTIFYFLAG REPLBATT SYSLOG+WALL+EXEC
NOTIFYFLAG NOCOMM SYSLOG+WALL+EXEC
NOTIFYFLAG FSD SYSLOG+WALL+EXEC
RBWARNTIME 43200
NOCOMMWARNTIME 300
FINALDELAY 5

##############upssched.conf##############

CMDSCRIPT /usr/bin/upssched-cmd
PIPEFN /run/nut/upssched.pipe
LOCKFN /run/nut/upssched.lock
AT COMMOK * EXECUTE notify
AT COMMBAD * EXECUTE notify
AT REPLBATT * EXECUTE notify
AT NOCOMM * EXECUTE notify
AT FSD * EXECUTE forced-shutdown
AT NOPARENT * EXECUTE notify
AT SHUTDOWN * EXECUTE notify
AT ONLINE * CANCEL-TIMER shutdown
AT ONLINE * EXECUTE resume
AT ONBATT * START-TIMER shutdown 1
AT ONBATT * EXECUTE shutdown-warning
AT LOWBATT * START-TIMER shutdown
AT LOWBATT * EXECUTE shutdown-warning

Answer 1

参考GPT和自己的思路，您好！根据您提供的信息，错误信息中指出“fopen /run/nut/upsmon,pid: No such file or directory”，这可能是导致无法连接到服务端的原因之一。建议您检查以下内容：

1.检查 upsmon 是否正确安装并正在运行。如果它没有运行，请使用以下命令启动：

sudo systemctl start nut-client.service

2.确认 /run/nut 目录是否存在。如果不存在，请创建它：

sudo mkdir /run/nut

3.确认 /run/nut/upsmon.pid 文件是否存在。如果不存在，请手动创建它：

sudo touch /run/nut/upsmon.pid

这些步骤应该能够解决您的问题。如果问题仍然存在，请提供更多详细信息，例如 nut-monitor 命令的输出或者 syslog 中的错误消息，以便更好地帮助您解决问题。