Version 9 (modified by 16 years ago) ( diff ) | ,
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Installing Extras
Syn Cookies
- Enable syncookies:
echo 1 > /proc/sys/net/ipv4/tcp_syncookies
- Preserve syncookies on reboot:
echo 'net.ipv4.tcp_syncookies=1' >> /etc/sysctl.conf
Install and configure mandatory packages
- Login as root and install the following packages (if you plan to install postfix, replace esmtp-run with postfix)
# aptitude install ssh ntp less emacs21-nox cron-apt iproute mailx esmtp-run locales lsof psmisc screen
- Configure locales to use en_US.UTF-8 (run dpkg-reconfigure locales if necessary)
- If you installed esmtp-run, edit /etc/esmtprc, configure to send email via our bulk.mayfirst.org server (which relays all mail from our IP range):
hostname=bulk.mayfirst.org
- Configure cron-apt:
echo 'MAILON="upgrade"' >> /etc/cron-apt/config
- Upload the mayfirst public keys to:
/root/.ssh/authorized_keys
- Configure ssh to only accept connections with auth keys (unless this is a server that should be accessible by members). Edit /etc/ssh/sshd_config and uncomment/change these lines:
PasswordAuthentication no ChallengeResponseAuthentication no
- Reload ssh:
# /etc/init.d/ssh reload
Fix Bash
- Overwrite /root/.bashrc with:
# ~/.bashrc: executed by bash(1) for non-login shells. export PS1='$? \h:\w\$ ' umask 022 # You may uncomment the following lines if you want `ls' to be colorized: # export LS_OPTIONS='--color=auto' # eval "`dircolors`" # alias ls='ls $LS_OPTIONS' # alias ll='ls $LS_OPTIONS -l' # alias l='ls $LS_OPTIONS -lA' # # Some more alias to avoid making mistakes: alias rm='rm -i' alias cp='cp -i' alias mv='mv -i'
- Modify the following lines in /etc/skel/.bashrc
PS1='$? ${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ ' ;; *) PS1='$? ${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
- Add a .ssh directory and empty authorized_keys file in /etc/skel:
mkdir /etc/skel/.ssh touch /etc/skel/.ssh/authorized_keys
Serial console login (not for DomU's, only dom0's!)
If you did not use the serial console installer, then perform the following:
- Edit the /etc/inittab file. Uncomment and modify:
T0:23:respawn:/sbin/getty -L ttyS0 115200 vt100
- Refresh:
$ sudo init q
- Add the following lines after the timeout line in
/boot/grub/menu.1st
serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1 terminal --timeout=10 serial console
- Add the following lines to the Start Default Options. You should already have a line such as:
# kopt=root=/dev/mapper/vg_servername0-root ro
add to it, so that your final line says:# kopt=root=/dev/mapper/vg_servername0-root ro console=ttyS0,115200n8
- Refresh grub's config file:
# update-grub
Encrypted File system
- Install programs:
$ sudo aptitude install dmsetup cryptsetup
- Create an encrypted file system for members:
- Create the encrypted filesystem (be sure to switch to use which ever device you are using):
$ cryptsetup luksFormat /dev/sda5
You will be prompted for a password. Put password in resource db! - Add to crypttab
echo crypt_members /dev/sda5 none luks >> /etc/crypttab
- Start it
/etc/init.d/cryptdisks start
- Create a file system on the partition:
$ mkfs -t ext3 /dev/mapper/crypt_members
- Add to fstab:
echo /dev/mapper/crypt_members /home/members ext3 defaults 0 2 >> /etc/fstab
- Mount
mount /home/members
- Create the encrypted filesystem (be sure to switch to use which ever device you are using):
Add Nagios logging
Optionally, you may want to login to chun.mayfirst.org
and edit the /etc/nagios2/conf.d/servers_mfpl.cfg
file to add this server for monitoring.
Add munin logging
You may also want to install munin-node and then add the server to the munin nodes managed by the Tachanka collective.
Note:
See TracWiki
for help on using the wiki.