Very Computer

Hi !!
I have a Linux Running on a Pentium Machine (RedHat 4)
In the Linux i run Sendmail and Dns server.
I need to protect it a Bit.... can you help me?.. please...

First at all.. i need to Deny any connection trying to get info from the DNS.... of course it must work
as a DNS server... but there's some details i need to restrict...... which ones you recommend?

About the Linux it self... how do i deny connection to any other PORT (apart from the DNS and Sendmail and POP)
to avoid people trying to connect to other ports....?
I need to get connected from the LAN through Telnet but.. i don't want any other people
from outside connecting to the Linux..... Maybe only to Check Mail POP. but tha's it..

Please..... help me!
Denise Merker {:-)

man hosts.allow, hosts.deny services, inetd.
Get a book on running Linux, Unix administration and security.
Grab a bag of popcorn and ....RTfM.  :)

Quote:

>Hi !!
>I have a Linux Running on a Pentium Machine (RedHat 4)
>In the Linux i run Sendmail and Dns server.
>I need to protect it a Bit.... can you help me?.. please...

>First at all.. i need to Deny any connection trying to get info from the DNS.... of course it must work
>as a DNS server... but there's some details i need to restrict...... which ones you recommend?

>About the Linux it self... how do i deny connection to any other PORT (apart from the DNS and Sendmail and POP)
>to avoid people trying to connect to other ports....?
>I need to get connected from the LAN through Telnet but.. i don't want any other people
>from outside connecting to the Linux..... Maybe only to Check Mail POP. but tha's it..

>Please..... help me!
>Denise Merker {:-)