RE: query on ip configuration

[KSI <ksiwebsphere@xxxxxxxxx>]

--
[ Picked text/plain from multipart/alternative ]

Thanks for you reply.  The user cannot access external network addresses 
(internet) from a PC, but through the iseries server (which has a external IP 
configured in it) using Telnet/FTP.  Is this a natural scenario or a security 
lapse??
 Andy Nolen-Parkhouse <aparkhouse@attbi.com> wrote:KSI,

What you're describing strikes me as very appropriate, providing that
they are executing the telnet/ftp commands from their iSeries session.

If you find that your users can suddenly access the internet from their
PC's when they have a connection to the iSeries, then your server is
functioning as a gateway. Check the IPDTGFWD (IP Datagram Forwarding)
parameter on your TCP attributes. If it is *YES, change it to *NO. Use
the CHGTCPA (Change TCP Attributes) command. The default for this
parameter is *NO.

Regards,
Andy Nolen-Parkhouse

> admin@midrange.com] On Behalf Of KSI
> Subject: query on ip configuration
>
> Hi All,
>
> I'm facing a typical situation. I have a iseries server with a single
> ethernet card, configured for 3 network addresses. one internal & two
> extenal ip's( all with seperate route, subnet mask). The surprising
> thing is the user who's configured to the local network (does not have
> any access to the external ip's) connects to the iseries server.
> And....from here he can do a telnet/ftp to any server that is attached
> to the external network(internet). Can anyone comment how is it
> possible for the local user connected to the iseries to gets access to
> the internet??
>
> How to restrict the local user from accessing the external network
> (internet) when connected to the iseries having a external ip
> configured??
>
> TIA..

_______________________________________________
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@midrange.com
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/cgi-bin/listinfo/midrange-l
or email: MIDRANGE-L-request@midrange.com
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.



---------------------------------
Do you Yahoo!?
Yahoo! Web Hosting - Let the expert host your site