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Ports used by sendmail
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James H. Markowitz
Aug 20, 2017, 10:04:13 AM8/20/17
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Let's assume that we have a sendmail server behind a firewall.
The server has been configured to use SSL/TLS - i.e. it listens on port
465.
In general, should the firewall be configured to allow incoming
connections at port 25 as well, or can that port be just blocked?
The server has been configured to use SSL/TLS - i.e. it listens on port
465.
In general, should the firewall be configured to allow incoming
connections at port 25 as well, or can that port be just blocked?
Claus Aßmann
Aug 20, 2017, 11:32:13 AM8/20/17
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James H. Markowitz wrote:
> Let's assume that we have a sendmail server behind a firewall.
> The server has been configured to use SSL/TLS - i.e. it listens on port
> 465.
Really? Why would you do that?
> Let's assume that we have a sendmail server behind a firewall.
> The server has been configured to use SSL/TLS - i.e. it listens on port
> 465.
> In general, should the firewall be configured to allow incoming
> connections at port 25 as well, or can that port be just blocked?
--
Note: please read the netiquette before posting. I will almost never
reply to top-postings which include a full copy of the previous
article(s) at the end because it's annoying, shows that the poster
is too lazy to trim his article, and it's wasting the time of all readers.
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