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Disabling_updates_and_external_access.md

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Disabling updates and external access

  • First of all start with sshd substitution, you'll enable regular ssh access and disable some backdoors.
  • Now is a good time to install Nano if you don't like or know how to use vi to edit text files - see Installing a package manager

Disabling updates and external access

  • Remove execution flag from "/usr/bin/oe-update-checker":
chmod -x /usr/bin/oe-update-checker
  • Disable the update check from crontabs
chmod -x /etc/cron.daily/update-checker
chmod -x /etc/cron.hourly/update-checker
  • Comment out these lines inside "/etc/init.d/oe-bootfinish"
if check_for_update; then
    success
else
    failure
fi

to do that:

vi /etc/init.d/oe-bootfinish
type: ":121"
type: "i"
place a pound # in front of the 5 lines above
hit the "Esc" key
type: ":wq"

Try the following if the above doesn't match your file

Comment out the following lines
    161 #    echo "    $AXENTRA_HEADER Checking for updates..."
    162 #    if check_for_update; then
    163 #        success
    164 #        echo "        success"
    165 #    else
    166 #        failure
    167 #        echo "        failed"
    168 #    fi
  • Now lets disable the OpenVPN daemon: remove execution flag from openvpn binary and starting script "/etc/init.d/openvpn":
chmod -x /etc/init.d/openvpn
chmod -x /usr/sbin/openvpn
  • Disable execution flag from a script that would allow Axentra to open a ssh tunnel through the web interface for "support" purposes:
chmod -x /var/www/admin/sshtunnel.pl
  • Disable telnetd:

Kill the daemon and comment out "/sbin/telnetenabled" from /etc/rc.local to avoid autostart

killall -9 telnetenabled
killall -9 telnetd
vi /etc/rc.local
type: ":10"
type: "i"
place a pound # in front of the "/sbin/telnetenabled" line
hit the "Esc" key
type ":wq"
  • Disable the daemon watchdog that will eventually try to re-launch openvpn etc..

You need to comment out this line from /etc/crontab: 0-59/5 * * * * root /usr/sbin/oe-check-daemons

vi /etc/crontab
type: ":11"
comment out placing a pound # or delete that line
type ":wq"

There are probably other things and I'll keep updating this page when I find them, but the only way to make sure you have a clean Stora is to completely dump their firmware and install a clean and trusted one, like the Debian project we're working on.

Have fun! --Pippone 08:46, 26 April 2010 (UTC)

Troubleshooting

  • If you are getting Operation not permitted* errors remember to get root access using sudo -E -s
  • If you see the message audit_log_user_command(): Connection refused it doesn't mean the command failed! It's caused by a bug