Re: Changing ports used by TCP/IP servers

[Vernon Hamberg <vhamberg@xxxxxxxxx>]

Thanks, John, I'll look at these things.

I agree, having everything in triplicate is daunting. I think there'll be
only 1 that'll be opened up for ftp - this'd be for customer uploads, esp.,
plus our own work remotely. Then we'd get on the system ourselves and ftp
internally, as needed, so there's really no NEED for different ports here.

telnet on different ports isn't so bad, since we mostly use this for PC5250
or other emulation, and those have the capability to set ports, so that's a
one-time thing. The same for our products, in which you set up the ports
yourself anyway. The other one that matters to me now is the Websphere Dev
Studio client stuff - again, you set these up once and then don't need to
enter them every time.

Gotta get into VPN. IBM's Redbook on this assumes Win2K or later, right, as
the client? I'll post a separate thread when I'm ready to start looking at
this, meanwhile, I'll look at the archive.

At 07:49 PM 7/26/02 -0500, you wrote:
>I think it would be hard to have three AS400's with different ports on each
>of them.
>
>I would look at the linksys router and see if it can convert ports for
>example 4003 to port 23 on as400 3. At least inside you would still be
>using port 23. I would also look
>at  http://klement.dstorm.net/rpg/socktut/index.html There is an example of
>a proxy server, not sure it will run on V3R7. Or at least look at a proxy
>server that runs on a PC, such as wingate you would use it for coming in
>not going out. When I used it a while back you could sign in like
>user@192.168.1.1  and it would redirect you to 192.168.1.1
>
>Even with nonstandard ports your AS400 will be seen on the Internet with a
>port scan, at least with a proxy server they will just see that computer
>(unless they crack it).
>
>John Ross