I have a new linux server with CentOS 7 isntalled with Chef software. The ip address of this server is 172.16.177.177. I was able to telnet on to port 443 on this server, please see below.
[root@jboss-testvm ~]# telnet 172.16.177.177 443
Trying 172.16.177.177...
Connected to 172.16.177.177.
Escape character is '^]'.
However, when I go to a window server on the same network, I couldn't telnet on the port 443 on this server. I thought the firewall may block the communication between these two servers, but my network admin told me since they both on the same subnet, there is no firewall between, it won't be the firewall's issue. Could you experts here help me out?
firewall is disbaled.
[root@jboss-testvm ~]# service iptable status
Redirecting to /bin/systemctl status iptable.service
● iptable.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)
[root@jboss-testvm ~]# lsof -i :443
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
nginx 794 root 14u IPv4 16823 0t0 TCP *:https (LISTEN)
nginx 1025 opscode 14u IPv4 16823 0t0 TCP *:https (LISTEN)
nginx 1026 opscode 14u IPv4 16823 0t0 TCP *:https (LISTEN)
nginx 1027 opscode 14u IPv4 16823 0t0 TCP *:https (LISTEN)
nginx 1028 opscode 14u IPv4 16823 0t0 TCP *:https (LISTEN)
[root@jboss-testvm ~]# netstat -an | grep 443 | grep LISTEN
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN
[root@jboss-testvm ~]# netstat -lnt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 127.0.0.1:4321 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:9090 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:42822 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:5672 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:25672 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:9999 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:9680 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:9683 0.0.0.0:* LISTEN
tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:9462 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:9463 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:15672 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:11001 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:11002 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:16379 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:59355 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:34175 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:8000 0.0.0.0:* LISTEN
tcp6 0 0 :::22 :::* LISTEN
tcp6 0 0 127.0.0.1:8983 :::* LISTEN
tcp6 0 0 ::1:5432 :::* LISTEN
tcp6 0 0 ::1:25 :::* LISTEN
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