Lookst like firewalld is not opening port 25. I tried adding the smtp service, and port 25 separately as well, yet, I am unable to telnet to the server. Any tips?
[root@host ~]# firewall-cmd --zone=public --list-all
public (default, active)
interfaces: eth0
sources:
services: dhcpv6-client http https smtp ssh
ports: 3762/tcp 25/tcp 7683/tcp 4424/tcp
masquerade: no
forward-ports:
icmp-blocks:
rich rules:
[root@host ~]# nmap XXXXXXXMYIP
Starting Nmap 6.40 ( http://nmap.org ) at 2016-01-14 00:11 CET
Nmap scan report for CentOS-72-64-minimal (XXXMYIP)
Host is up (0.0000080s latency).
Not shown: 990 closed ports
PORT STATE SERVICE
21/tcp open ftp
53/tcp open domain
80/tcp open http
110/tcp open pop3
143/tcp open imap
443/tcp open https
993/tcp open imaps
995/tcp open pop3s
3306/tcp open mysql
20000/tcp open dnp
Nmap done: 1 IP address (1 host up) scanned in 0.05 seconds
[root@host ~]#
