Security

Welcome to the Security

Introduction

On this page we will collect information to harden your system.

To check your security you can use Lynis security scan.

With GhostBSD you can get a high score.

How to harden your system

It is easy to get GhostBSD to get a score of 70. Install rkhunter and change 4 settings.

You can make additional changes to improve the score. Feel free to test to see what is comfortable for you.

If we simply set the network related values, we will not affect the user experience.

These changes plus adding one pkg (rkhunter) will provide a score of...

For those that want to keep those changes after reboot, just add them to /etc/sysctl.conf.

Also using clamav help to raise the score.

How could keep those change - How setting security

Append /etc/sysctl.conf with these entries:

   hw.kbd.keymap_restrict_change=4
   kern.sugid_coredump=0
   net.inet.icmp.bmcastecho=0
   net.inet.icmp.drop_redirect=1
   net.inet.ip.accept_sourceroute=0
   net.inet.ip.check_interface=1
   net.inet.ip.forwarding=0
   net.inet.ip.process_options=0
   net.inet.ip.random_id=1
   net.inet.ip.redirect=0
   net.inet.ip.sourceroute=0
   net.inet.tcp.always_keepalive=0
   net.inet.tcp.blackhole=2
   net.inet.tcp.drop_synfin=1
   net.inet.tcp.icmp_may_rst=0
   net.inet.tcp.nolocaltimewait=1
   net.inet.tcp.path_mtu_discovery=0
   net.inet.udp.blackhole=1
   net.inet6.icmp6.rediraccept=0
   net.inet6.ip6.forwarding=0
   net.inet6.ip6.fw.enable=1
   net.inet6.ip6.redirect=0
   # The settings below will change the user experience
   security.bsd.hardlink_check_gid=1
   security.bsd.hardlink_check_uid=1
   security.bsd.see_other_gids=0
   security.bsd.see_other_uids=0
   security.bsd.stack_guard_page=1
   security.bsd.unprivileged_proc_debug=0
   security.bsd.unprivileged_read_msgbuf=0

Additional Information

• FreeBSD ports
• FreeBSD Handbook: Security

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