On OpenSuse 15.2, the assigned IP address has only SSH port open. The localhost has several more open, which allows me to run mail server, by referencing localhost.
However, this causes other machines on local network to be denied access to
On 11/01/2022 02.36, Joseph Acquisto wrote: the email server.
What do you mean?
What mail server are they trying to access?
I don't see why Linux would interfere with that, unless you assigned the same IP to two computers.
Or do you want those machines to access the Linux mail server? Then you have to tell the Linux mail server to listen on the LAN, not on localhost only.
I need to be able to access the SMTP services on the subject host from other servers on the local network. I cannot. Please see below for what I hope clarifies the problem The local IP address 192.168.x.x shows only port 22 (SSH) open: ~ # nmap -sT 192.168.x.xxx Starting Nmap 7.70 ( https://nmap.org ) at 2022-01-10 21:37 EST Nmap scan report for aabbcc (192.168.x.xxx) Host is up (0.000088s latency). Not shown: 999 closed ports PORT STATE SERVICE 22/tcp open ssh Nmap done: 1 IP address (1 host up) scanned in 0.07 seconds
The localhost address 127.0.0.1 shows: ~ # nmap -sT 127.0.0.1 Starting Nmap 7.70 ( https://nmap.org ) at 2022-01-10 21:36 EST Nmap scan report for localhost (127.0.0.1) Host is up (0.017s latency). Not shown: 996 closed ports PORT STATE SERVICE 22/tcp open ssh 25/tcp open smtp 783/tcp open spamassassin 10025/tcp open unknown Nmap done: 1 IP address (1 host up) scanned in 0.13 seconds Therefore, I cannot access on the IP bound to the server for those services, except by accessing via localhost.
The firewall is not running: ~ # firewall-cmd --list-services FirewallD is not running
IPtables shows no rules: ~ # iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination I see no reason why the bound IP should have these ports closed. I should be able to find what causes them to be shut and reopen them. But I cannot find where that may be. joe a. --------------------------------- j4computers, llc Stone Ridge, NY 12484 845-687-3734 www.j4computers.com ---------------------------------