Shulou(Shulou.com)06/03 Report--

Take querying port 873 as an example:

① # ss-lntup | grep 873

[root@backup nfsbackup] # ss-lnutp | grep 873

Tcp LISTEN 0 64: 873:: * users: (("xinetd", 1810, 5))

[root@backup nfsbackup] #

② # netstat-lntup | grep 873

[root@backup nfsbackup] # netstat-lnutp | grep 873

Tcp 0 0: 873: * LISTEN 1810/xinetd

[root@backup nfsbackup] #

③ # lsof-I: 873

[root@backup nfsbackup] # lsof-iRU 873

COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODENAME

Xinetd 1810 root 5u IPv6 12433 0t0 TCP *: rsync (LISTEN)

[root@backup nfsbackup] #

④ # telnet 10.0.0.41 873 (linux yuminstall telnet)

[root@web02] # telnet 172.16.1.41873

Trying 172.16.1.41...

Connected to 172.16.1.41.

Escape character is'^]'.

@ RSYNCD: 30.0

⑤ # nc 10.0.0.41 873

[root@web02] # nc 172.16.1.41 873

@ RSYNCD: 30.0

⑥ # nmap-p 873 10.0.0.41

[root@web02 ~] # nmap-p 873 172.16.1.41 # # scan the host

Starting Nmap 5.51 (http://nmap.org) at 2017-05-13 13:41 CST

Nmap scan report for backup (172.16.1.41)

Host is up (0.00069s latency).

PORT STATE SERVICE

873/tcp open rsync

MAC Address: 00:0C:29:01:17:0F (VMware)

Nmap done: 1 IP address (1 host up) scanned in 0.20 seconds

[root@web02 ~] # nmap-p 873 172.16.1.0 swap 24 # scan the network segment

Starting Nmap 5.51 (http://nmap.org) at 2017-05-13 13:41 CST

Nmap scan report for web01 (172.16.1.7)

Host is up (0.00018s latency).

PORT STATE SERVICE

873/tcp closed rsync

Nmap scan report for web02 (172.16.1.8)

Host is up (0.00072s latency).

PORT STATE SERVICE

873/tcp closed rsync

MAC Address: 00:0C:29:B1:33:AE (VMware)

Nmap scan report for nfs01 (172.16.1.31)

Host is up (0.00039s latency).

PORT STATE SERVICE

873/tcp closed rsync

MAC Address: 00:0C:29:86:08:29 (VMware)

Nmap scan report for backup (172.16.1.41)

Host is up (0.00057s latency).

PORT STATE SERVICE

873/tcp open rsync

MAC Address: 00:0C:29:01:17:0F (VMware)

Nmap done: 256 IP addresses (4 hostsup) scanned in 2.02 seconds

[root@web02 ~] #

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