ok, new query, new post.
I have to run 2 linux servers for
1. as a DNS only.
services running are
22/tcp open ssh
53/tcp open domain
what can i do to make it absolutely difficult for a cracker to crack it, but
at the same time, my DNS is running prefectly.
i have upgraded the BIND packages to the latest.
2. as a mail server
service running are
22/tcp open ssh
25/tcp open smtp
110/tcp open pop-3
143/tcp open imap2
389/tcp open ldap
3306/tcp open mysql
both the machines have iptables.
what would be a quick summary to keep my machines secure.
Arvind
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