Question
Port 25 won't open despite ufw allow 25
I’m trying to set up an email server. I can’t seem to get port 25 to open for me. I literally just did:
ufw disable
ufw reset
ufw default deny incoming
ufw default allow outgoing
sudo ufw allow 22/tcp
sudo ufw allow 25
And then sudo ufw status verbose
…
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing), disabled (routed)
New profiles: skip
To Action From
-- ------ ----
22/tcp ALLOW IN Anywhere
25 ALLOW IN Anywhere
22/tcp (v6) ALLOW IN Anywhere (v6)
25 (v6) ALLOW IN Anywhere (v6)
However, one cursory glance of sudo netstat -tulpn | grep LISTEN
and..
tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN 512/systemd-resolve
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 664/sshd: /usr/sbin
tcp6 0 0 :::22 :::* LISTEN 664/sshd: /usr/sbin
and telnet [my server IP] 25
:
telnet: Unable to connect to remote host: Connection refused
What gives? How can I open up my ports?
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Oh, pardon. I did
sudo ufw enable
aftersudo ufw allow 25
.