From the Network details page, you can update the reverse lookup for assigned IP address(es) and null router an IP address.
Network
In the Network Details section of the Colocation Server Management page, you can view the public network switch port that the server is connected to. In the case of a rack, you can only view the status of the router port.
DDoS IP Protection
In the DDoS IP Protection section, you can view the current status as well as manage your settings.
To manage your settings, click the Edit link.
In the manage settings dialog, you can enable or disable email notifications for Nulling events and Scrubbing events.
Information
Standard DDoS IP Protection is an always-on feature. Mitigation by nulling and scrubbing cannot be disabled, only the e-mail notification of such an event can be disabled.
For more information please refer to the DDoS IP Protection page.
IP Addresses
The IP Addresses section on the Details page displays the server IP(s), the prefix length in CIDR notation, the Gateway address, if null routing is enabled/disabled, the Reverse DNS and you can Null route the IP.
| IP | Displays the IP address and prefix length in CIDR notation |
| Gateway | Displays the gateway address |
| Nulled | Whether or not the IP address is nulled |
| Reverse DNS | Displays the domain name that is associated with the servers IP address and the edit link to set reverse DNS. |
| Actions | Displays the Null route link to enable/disable Null routing |
Information
If you need to know the subnet mask, it can be computed from the CIDR subnet size:
| CIDR Prefix length | Subnet Mask |
| /24 | 255.255.255.0 |
| /25 | 255.255.255.128 |
| /26 | 255.255.255.192 |
| /27 | 255.255.255.224 |
| /28 | 255.255.255.240 |
| /29 | 255.255.255.248 |
Setting Reverse DNS
To set a new Reverse DNS click the Edit button.
Enter the fully qualified domain name (FQDN) in the highligthed area for the server to provide reverse lookup, click Confirm.
Null- route an IP address
You can stop all incoming and outgoing connections to an IP address by null routing it. If you have multiple IP addresses associated with your server, null routing is an alternative to disabling the switch port, which would result in a server that is completely unreachable.
Why would I null-route an IP address?
There could be a lot of traffic heading towards an IP address that is used by your server. This can be caused by a popular website going viral or it can be caused by malicious traffic. The problem is that the extra amount of traffic can be generating more bandwidth usage than you committed to in your contract, resulting in an increase of your monthly bill. Or it can use all the resources of your server resulting in downtime or very slow responses for all of the services on that server.
By null routing the IP the generated traffic will be stopped at our core router infrastructure so it will never reach your server.
How to null-route a IP address
Perform the following steps to null-route an IP address:
- Go to ‘IP Management’ page under ‘Network’.
- Select the IP address -> ‘Null Route’. The IP Null-routing dialogue box displays.
- Enter the following information, and click Confirm. Information Field Name Description Null-routing duration (hours) Enter the total hours for which you want to null route the IP address. (optional)
Note: If you do not enter a value, the IP address will be null routed until you remove it. Comment* Enter a comment when null routing the IP address. - The confirmation box appears displaying the IP which is null routed at the right top corner
How to remove a null-route
If there is no time specified when null-routing the IP address. The null-route will remain active until removed manually. To remove a null-route proceed with the following steps.
- Go to ‘IP Management’ page under ‘Network’.
- Select the IP address -> Click ‘Un-Null Route’.
- Verify the IP address displayed in the box and click OK.
