as I check if an SMTP port is not blocked by Zentyal

[rawa]

as I check if an SMTP port is not blocked by Zentyal

Hello

As I see that ports are blocked by Zentyal Zentyal 3.3 started as a router and detects only the fresh, mails SMTP SSL port 465 or port 26 using do not work well, but if they do not think it's a problem of Zentyal, I would like to verify by doubts that these ports are not blocked by Zentyal.

thanks

Ruben Arno

como compruebo si un puerto SMTP no esta bloqueado por Zentyal

Hola

Como compruebo que puertos estan bloqueados por Zentyal, puse Zentyal 3.3 como ruteador y solo detecte que los envios de mails SMTP: puerto 465  SSL o usando puerto 26 no funcionan bien, pero si bien no creo que sea un problema de Zentyal, me gustaria verificar por las dudas que estos puertos no esten bloqueados por Zentyal.

Gracias

Ruben Arno

[Marcus]

Hello rawa,

A telnet would do the job...

Code: [Select]

telnet host port
Exemple:

Code: [Select]

telnet smtp.gmail.com 25
Best,

Marcus

[half_life]

What is listening on my server?
netstat -plant
How do I see the firewall rules?
iptables -L
Another way to verify from another machine
nmap <your ip address here>

Add the above to what Marcus has already said and you have a pretty complete picture as to what is listening.  What is blocked, and what i not blocked.