Sysctls

If you find ssh connections from OpenBSD to other servers frequently time out, try forcing TCP Keep Alives:

# sysctl net.inet.tcp.always_keepalive=1

To apply all sysctls in /etc/sysctl.conf, run this command as root:

$ doas sysctl -f /etc/sysctl.conf

You may get the following error:

sysctl: unknown option -- f
usage: sysctl [-Aanq] [name[=value] ...]

In that case, you are running an older version of OpenBSD that does not support -f argument. you may use the following script to do it:

# for c in $(cat /etc/sysctl.conf | egrep -v "^#"); do sysctl $c; done