I implemented a ssh conection from the outside to my intranet. This ssh requires a username and a password.
In terms of security what is more secure: require authentication (username and password) or having the public key of each user that connects to our intranet in the
authorized public key lists (in this case there is no need for username and password)?
In the second case there is no need of authentication and only the users wich have the public keys in the list are allowed to enter in my intranet.
This second solution is a good solution or that brings other security problems ?
"Keep your friends close, but your enemies closer."
"Do or do not. There is no try" - Yoda
I feel erroneusly (?) secure after .host.denyed in.telnetd and
in.sshd from everywhere except one pc, which is denying all exept
keyboard. I belive that if i can keep hosts.deny and hosts.allow files
safe, and from time to time patch most actual security holes i`ll be
conditionaly safe. Em i wrong? Probably I do.
I just cant imaginate how system can be cracked in lower stage, so
that is my problem. I heard that inetd is very insecure, and some
peoples using tcpd (or soundlike).
I run harden_suse, but was forced to answer 8/10 to no, as my server
should provide a lot of public services, and have world writible
directories as well. And thats right - this script was developed not
for systems like mine one. However i`ll run SuSE-firewall-3.0 script,
to make my system even stronger. But thats all. I dont know what can i
do else. I should keep folowing services open:
httpd; smptd; pop3d; ftpd; snmpd; named; inetd; sshd; nscd.
So if you know how to keep them at minimal risk, or know some holes at
those, i would be very gratefull for any info and/or tips.
I dont ask to do work for me - link to good manual would be nice too.
By the way i have SuSE 6.3 (2.2.13).
Thanks in advice.
Gediminas Grigas mailto:firstname.lastname@example.org
umm, I have a small problem.
When setting up our server, I tried to get the best security as possible.
Maybe I changed some config-file to fit our needs to allow ssh-logins only
from specified users.(But I have no idea which file this was :-(( )
Now I want to allow another user to login using ssh.
I made ssh-keygen for this user, entered the password, copied identity.pub
to authorized_keys in the .ssh-directory.
But when trying to login via ssh, servers sends permission denied.
What else must be done ?