In most cases, your virtual servers networking will automatically be configured by means of either DHCP on KVM based services, or by VZCTL in the case of OpenVZ.
If you want to make use of our IP Failover or Anycast IP addresses, though, you'll have to manually configure your networking for both platforms.
While on the
Networking tab of your virtual server, you can click the cog next to any of your IP addresses & select
Network Settings to see that IP addresses netmask/bitmask, gateway, resolvers, etc.
Remember, do not set multiple gateway entries! This will cause connectivity issues for your virtual server!
auto eth0 iface eth0 inet static address 220.127.116.11 netmask 255.255.255.0 gateway 18.104.22.168
auto eth1 iface eth1 inet static address YOUR_PRIVATE_IP_HERE netmask 255.255.0.0
iface eth0 inet6 static address YOUR_IPV6_ADDRESS_HERE/48 netmask 48 gateway 2605:6400:2:fed5::1
iface eth0 inet6 static address YOUR_IPV6_ADDRESS_HERE/48 netmask 48 gateway 2605:6400:1:fed5::1
iface eth0 inet6 static address YOUR_IPV6_ADDRESS_HERE/48 netmask 48 gateway 2605:6400:3:fed5::1
If your virtual server has < 512MB RAM you'll likely suffer poor network performance due to strict default buffer sizes.
To get around this please add the follow to your /etc/sysctl.conf
net.core.rmem_max=16777216 net.core.wmem_max=16777216 net.ipv4.tcp_rmem=4096 87380 16777216 net.ipv4.tcp_wmem=4096 65536 16777216
Once you're done this be sure to
sysctl -p to apply it.
These settings will automatically apply during restarts so you shouldn't need to cron/script anything else.