Solved

E-Mail account over ppp connection

Posted on 1997-07-16
2
161 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

Manage your data center from practically anywhere

The KN8164V features HD resolution of 1920 x 1200, FIPS 140-2 with level 1 security standards and virtual media transmissions at twice the speed. Built for reliability, the KN series provides local console and remote over IP access, ensuring 24/7 availability to all servers.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

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…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

829 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