UNIX for Dummies Questions & Answers

Linux question, upgraded from Linux 6 to 7.1. BUT on the upgrade we lost the DNS config, the alias vitual host and a virtual host email address.
So question is how do i get them all back?
I ran the ifconfig eth0:1 ip.ad.dr.ess whic created the vitual host and ip address but when i reboot it loses this (how do i get it to stick?).
The DNS relies on that host address, but not 100% sure DNS is working correctly.
Also hoe do i configure so i can telnet ot the box? xinet.d is running but ????
Please help
Thanks
olly

Sounds like you are running Redhat, correct?

You can modify your network settings by using the control panels in your X window manager, or by editing the files in /etc/sysconfig/network-scripts/


To allow telnets into the box, edit /etc/xinetd.d/telnet and make sure the "disable" line is set to no. You will have to restart xinetd for the change to take affect. Consider using ssh instead of telnet as a secure solution.

I would consider not even running inetd, period. If you need any of the inetd services, run them as stand alone daemons.

What is your justification for this?

my justification is that it is internal so security isnt really an issue...yet. i am a new red hat user so ssh i have not yet covered, so i am working with what i know.
if i use ssh how can i connect to the server using terminal emulation software??

PxT,

My justification is this: there are a great deal of vulnerable services that run from within inetd in redhat (ftp, linuxconf, etc). I would just shutoff inetd, and run as standalone services because, at the minimum, this will require the admin to think about whether or not they actually need the service running. Lets say you need ftp. If you do not have inetd running, it will at least force you to get the latest FTP build (protecting against all the latest buffer overflows). I do not use telnet, ftp, or anything that requires to be run out of inetd.

you can use ssh instead of telnet
you can use scp instead of ftp

But that is just my two cents.

Good point, and in fact many of the newer distributions (RedHat, for one) disable everything in inetd (or xinetd) now by default. Then the sysadmin has to go in and turn on just those services that they need.