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tcp/ip security on a single port

By lelton ·
Hi Gents,
We have just setup a mail server and open the mail port to the outside world. We only need/want our laptop uses to access our mail server. I right now the user is challenged with a pop3 user name and password to get email access. Is thereany additional password/encription software that I could install on the server and clients that would only allow those company laptop to access the mail server on port 110. I remember seeing some shareware program that did exactly this based upon anextra windows password chanllenge, but I am looking for something a little bit stronger (like encription technology). I don't think this is in the areana of VPN's (its not drive access), but its the same kind of idea.

In essence I am looking for encription technology to allow/disallow access to port 110.

Any ideas ?

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tcp/ip security on a single port

by Archibald In reply to tcp/ip security on a sing ...

Actually a port is open or closed essentially. If you are looking for your network to remain closed to most everyone then VPN is what you want.

If you are looking for encryption in username and password verification check out what your mail server application supports or offers and configure from there.

Sorry I don't have more

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tcp/ip security on a single port

by lelton In reply to tcp/ip security on a sing ...

The question was auto-closed by TechRepublic

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tcp/ip security on a single port

by eBob In reply to tcp/ip security on a sing ...

I would have the network gear between the users and the email server (i.e., your firewall and/or router) use something like TACACS+ or RADIUS.

You can pick up a "lite" TACACS server from the Cisco CCO site, but I recommend spending the money and buying a full version.

You can tie this into your other security "policies".

Just setup the network gear with access lists that will allow only the selected port(s) through, and will also bring up the security gear.

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tcp/ip security on a single port

by lelton In reply to tcp/ip security on a sing ...

The question was auto-closed by TechRepublic

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tcp/ip security on a single port

by lelton In reply to tcp/ip security on a sing ...

This question was auto closed due to inactivity

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