Linux
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Fix slow SSH login
Add the following line if your SSH login takes a long time on your SSH server. File /etc/ssh/sshd_config: UseDNS no Restart the SSH daemon to activate this change.
Month: May 2008
Network
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Some iptables tricks
Multiport The Multiport extension allows you to specify multiple ports and ranges and makes it possible to create complex rules in one line. Here’s an example of how you can allow SSH, Web, IMAP and X terminal traffic iptables -A INPUT -p tcp -m multiport –dports 22,80,143,6000:6003 -j ACCEPT The alternative to using this rule […]
Network
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Using ufw / iptables in Ubuntu 8.04 LTS
ufw (Uncomplicated Firewall) is a new and easy firewall/iptables tool introduced in Ubuntu 8.04 LTS (Hardy Heron). ufw is a front-end for iptables-restore, with its rules saved in /etc/ufw/before.rules, /etc/ufw/after.rules and /var/lib/ufw/user.rules. Administrators can customize before.rules and after.rules as desired using the standard iptables-restore syntax. Rules are evaluated as follows: before.rules first, user.rules next, and […]