Knowledge Base

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Network Articles

IPv6 subnet size reference

Looking for more IPv6 Information?CIDR SubnetNos. of IPs/1281/1272/1264/1258/12416/12332/12264 ...


Where are your datacenters located?

You can instantly deploy to any of our clouds . We currently maintain presence in:San Jose, CA Los Angeles, CA Los Angeles, CA 2 (DDoS Protected) Chicago, IL Reston, VA New York, NY Amsterdam, Netherlands Chennai(Madras), India London, United Kingdom Paris, ...


How long before DNS changes / new entries take effect?

Changes to DNS or new entries are instant within the server and the network. You can perform an 'nslookup' to perform verification. Global resolution through the internet (for instance, just checking using your home Internet connection) takes 24-72 hours for the changes to propogate through ...


Can I get a /64 ?

By default we assign you one globally routed IPv6 address. If you have a need for more address space (most people don't), in some locations you can request a /64 and we will assign one to your server automatically. Locations that currently support automated /64 provisioning including: ...


I have my own IP space. Can you BGP advertise it or setup a session on my Cloud Server?

If you have your own IP space, and would like us to either advertise it via BGP and assign it to your cloud server(s), or establish a bgp session so that you can control the advertisement we are happy to accomodate your request. Please contact us for additional information and pricing.You ...


Ubuntu kernel: IPv6 addrconf: prefix with wrong length

If you're seeing errors like:IPv6 addrconf: prefix with wrong length 48In your dmesg / syslog on Ubuntu, add the following params to your sysctl# Don't listen for RA's or autoconfnet.ipv6.conf.all.accept_ra=0net.ipv6.conf.all.autoconf=0net.ipv6.conf.default.accept_ra=0 ...


IPv6 Gateway

All of our servers should have IPv6 network information statically written to the network config files during installation.If find that your gateway is missing for some reason, it will always be ::1 on the same subnet as your primary IPv6 address.


Slave DNS

For ns1-4.hostvirtual.com to slave your zones, you must: 1. Use your masters IP address in the master field of https://www.vr.org/dns/ 2. Allow zone transfers from the following Host Virtual IP addresses: 208.111.33.149 209.177.157.147 103.6.84.130 208.111.33.150 209.177.157.5 ...


Can you change my ip address in Hong Kong?

To prevent abuse, we do not change IP addresses in Hong Kong once they are assigned to you. (This includes due to blocking, etc.) You can purchase a second ip address via the upgrades tab if you require a different address.


Primary Nameservers for DNS Management

If you are managing your domain through https://www.vr.org/dns/ You should use: ns1.hostvirtual.com ns2.hostvirtual.com ns3.hostvirtual.com ns4.hostvirtual.com For your domain registrar/DNS nameserver settings.


DDoS Protected Network Limitations

By default we block certain types of traffic in our DDoS protected locations. Please contact your account manager if you require custom filters or are having difficulty with the default level of protection.


sample quagga bgp ipv4 ipv6 dual stack configuration

For customers establishing bgp sessions with us using quagga the following is a sample, dual stack ipv4 / ipv6 configuration.hostname your_router_namepassword your_router_passwordlog file /var/log/quagga/bgpd.loglog stdout!router bgp your_as_numberno synchronization ...


Sample BGP anycast deployment

Your needs for BGP anycast may vary - simple redundancy, failover, absolutely as much coverage as possible, or even and consistent routability. Please contact us if you have a specific need so that we can discuss various options with you. If your goal is completely even routability we ...


Installing APF Firewall on Your System

In today's online world of denial of service attacks and emerging threats, in addition to simply building a secure application, it's a very good idea to install a firewall on your system.APF firewall offers protection not only from rogue ports being opened, but proactive ...


IPtables returns an error : security raw nat mangle filter FAILED

If you receive an error while restarting IPtables on your virtual machine that includes : raw nat mangle filter [FAILED] or similar, this is a known error with CentOS 5 / CentOS 6 on virtual architectures. You simply need to modify the : /etc/init.d/iptables file.Example Error : ...