SSH 伺服器正在運作但在網路上不可見

Question

我的 ssh 伺服器在連接埠 2224 上運行。

bash-3.2# /etc/init.d/sshd2 status
openssh-daemon (pid  19737) is running...


bash-3.2# nmap localhost

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2012-09-07 05:14 IST
mass_dns: warning: Unable to determine any DNS servers. Reverse DNS is  disabled.     
Interesting ports on telnets.nith.ac.in (127.0.0.1):
Not shown: 1671 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
25/tcp   open  smtp
80/tcp   open  http
111/tcp  open  rpcbind
443/tcp  open  https
631/tcp  open  ipp
646/tcp  open  unknown
3306/tcp open  mysql
8443/tcp open  https-alt

bash-3.2# netstat -nap |grep 2224
tcp    0   0 0.0.0.0:2224   0.0.0.0:*      LISTEN           19737/sshd2 

Answer 1

nmap實際上預設僅掃描數千個“最常見”連接埠。顯然，連接埠 2224 不符合要求。-p如果您想掃描特定範圍的端口，請查看該選項。