I have a Bitnami server, Ubuntu Xenial, on AWS LightSail. I followed this tutorial to restrict SSH connections by country. This script ipfilter.sh filters IP addresses:
#!/bin/bash
# License: WTFPL
# UPPERCASE space-separated country codes to ACCEPT
ALLOW_COUNTRIES="US UK"
LOGDENY_FACILITY="authpriv.notice"
if [ $# -ne 1 ]; then
echo "Usage: `basename $0` " 1>&2
exit 0 # return true in case of config issue
fi
if [[ "`echo $1 | grep ':'`" != "" ]] ; then
COUNTRY=`/usr/bin/geoiplookup6 "$1" | awk -F ": " '{ print $2 }' | awk -F "," '{ print $1 }' | head -n 1`
else
COUNTRY=`/usr/bin/geoiplookup "$1" | awk -F ": " '{ print $2 }' | awk -F "," '{ print $1 }' | head -n 1`
fi
[[ $COUNTRY = "IP Address not found" || $ALLOW_COUNTRIES =~ $COUNTRY ]] && RESPONSE="ALLOW" || RESPONSE="DENY"
if [[ "$RESPONSE" == "ALLOW" ]] ; then
logger -p $LOGDENY_FACILITY "$RESPONSE sshd connection from $1 ($COUNTRY)"
exit 0
else
logger -p $LOGDENY_FACILITY "$RESPONSE sshd connection from $1 ($COUNTRY)"
exit 1
fi
And I set it up with:
sudo -y apt-get install geoip-bin geoip-database
sudo echo "sshd: ALL" > /etc/hosts.deny
sudo echo "vsftpd: ALL" >> /etc/hosts.deny
sudo echo "sshd: ALL: spawn /path/to/file/ipfilter.sh %a" > /etc/hosts.allow
I restarted the SSH daemon with sudo systemctl restart ssh.service. I attempt a connection from another country and check the files /var/log/syslog and /var/log/auth.log, which do not show this event. The file /etc/rsyslog.conf does not show the location of logging for the authpriv facility.
How can I check that this IP filter is working?
