Solved

E-Mail account over ppp connection

Posted on 1997-07-16
2
158 Views
Last Modified: 2010-03-17
How can I give users only email access (pop) when they
are connected over ppp, I mean, they have to see only
the pop and sendmail and not be able to do anything else,
(www, ftp, etc).

Thanks
0
Comment
Question by:norberto071697
2 Comments
 
LVL 1

Accepted Solution

by:
mgrcnk earned 200 total points
ID: 1585573
You can set up a firewall.  That sounds somewhat complex, so I will offer a bit of an easier solution.  Try ipfilter.  I use it for IP Masquerading, but its original design was to filter out specific packets.  You could set it up to only allow POP packets, though.

You can find the source for this at:

http://www.cyber.com.au/users/darrenr/

Also, since I haven't checked the newest releases of Linux, it may come with this preinstalled (some Unix variants do).  So, see if you have the binaries ipf and ipnat.

chris
0
 

Expert Comment

by:cnbishop
ID: 1585574
I found the ipfwadm tool did exactly what I needed, and the installation was as easy as they get.  Danial Bourgin runs an Update-linux script at ftp.wsc.com (you'll have to hunt for the subdir, but the strings 'pub' and 'update_linux' are in there).  The installation of the ipfwadm package - and dissecting the config that was in place as part of the install - was really easy.  Haven't tried MGRCNK's idea, but this worked for me very well.

Hint - I shut nearly all ports but 110 and 25.  Let me know if I can expand on this idea.
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

I have seen several blogs and forum entries elsewhere state that because NTFS volumes do not support linux ownership or permissions, they cannot be used for anonymous ftp upload through the vsftpd program.   IT can be done and here's how to get i…
Note: for this to work properly you need to use a Cross-Over network cable. 1. Connect both servers S1 and S2 on the second network slots respectively. Note that you can use the 1st slots but usually these would be occupied by the Service Provide…
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…
This video discusses moving either the default database or any database to a new volume.

746 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now