Monitoring IP

There are many monitoring IP which is used to determine if your server is online. The monitoring system is based upon ping request. If the monitoring server isn’t able to ping your server, it would suggest that your server is offline and it would lead to alerts being sent to the datacenter automatically.

If you make use of an restrictive firewall, you would need to enable the following rules in your firewall:

Monitoring IP

/sbin/iptables -A INPUT -i eth0 -p icmp --source proxy.ovh.net -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source 37.187.231.251 -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source a2.ovh.net -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source 92.222.184.0/24 -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source 92.222.185.0/24 -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source 92.222.186.0/24 -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source 167.114.37.0/24 -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source proxy.p19.ovh.net -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source proxy.rbx.ovh.net -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source proxy.sbg.ovh.net -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source proxy.bhs.ovh.net -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source ping.ovh.net -j ACCEPT
/sbin/iptables -A INPUT -i eth0 -p icmp --source aaa.bbb.ccc.250 -j ACCEPT 
/sbin/iptables -A INPUT -i eth0 -p icmp --source aaa.bbb.ccc.251 -j ACCEPT 

For the last two rules, you would need to adjust it accordingly against your server IP. 
If your IP is 192.168.0.1 then the last two rules you would have them as 192.168.0.250 and 192.168.0.251