The Remote Access section of the Linode Manager contains important network settings for your Linode. Use this tab to find your IP address, set the reverse DNS, configure IP failover, and swap IP addresses with another Linode. You can also access the Linode Shell (Lish) console to remotely connect to your Linode and troubleshoot problems.
The Network Access section provides access to the settings for reverse DNS, IP failover, and swapping IP addresses. It also displays your Linode's IP addresses, default gateways, and DNS resolvers.
The ability to associate an IP address with a domain name is referred to as forward DNS resolution. Reverse DNS lookup is the inverse process, where an IP address resolves to its designated domain name. Official Internet documents state that "every Internet-reachable host should have a name," and that the name should match a reverse pointer record. (See RFC 1033 and RFC 1912.)
Here's how to set reverse DNS for your domain names:
Before setting reverse DNS, verify that you have created a matching forward DNS record for the IP address. For instructions, see Adding DNS Records. If you use a third-party DNS provider, create the forward DNS record with your provider's management tool.
You have successfully configured reverse DNS.
If you receive the message that no match was found, this indicates that you need to update the forward DNS for this domain. Make sure the domain or subdomain in question resolves to the IP address for which you are trying to set the reverse DNS. If you've recently made a DNS change, you may need to wait 24-48 hours for it to propagate.
To reset reverse DNS to the Linode domain, which will be something like li12-345.members.linode.com, follow these instructions:
You'll see a confirmation message that the reverse DNS has been reset.
If you're using two Linodes to make a website highly available with Heartbeat and Pacemaker , you can use the Linode Manager to configure IP failover. Here's how:
You have successfully configured IP failover.
Linode's philosophy is to provide a plain Internet connection to every customer. We also implement some networking restrictions to prevent malicious activity and the abuse of our service.
By default, Linodes are able to send and receive traffic only for the MAC and IP addresses they are assigned. This restriction also applies to all ARP and IPv6 Neighbor Discovery traffic.
If you want to allow one Linode to use another Linode's IP address, such as for a high availability setup, you will need to enable IP Failover in the Linode Manager for every Linode that needs to use the IP address. For more information on enabling IP Failover, please see the previous section of this guide.
If you have two Linodes in the same data center, you can use the IP swap feature to switch their IP addresses. This could be useful in several situations. For example, if you've built a new server to replace an old one, you could swap IP addresses instead of updating the DNS records.
Here's how to swap IP addresses:
The menu only displays Linodes hosted in the same data center as the current Linode.
The Linode Manager will shut down both Linodes to switch the IP address. Don't forget to turn the Linodes back on after the process is complete - you'll need to boot them manually.
The Linode Manager allows you to add private IP addresses for fast and secure connections between Linodes located in the same data center. Here's how to add a private IP address:
If you'd like to add more than one private IP address to your Linode, please contact support.
You can use the Linode Manager to add additional public IP addresses to your account. However, due to the impending exhaustion of the IPv4 address space, Linode requires users to provide technical justification. To add another public IP address, please contact support with your justification.
The Lish console allows you to access your Linode at any time, even if you've messed up your network settings. To access Lish, use the Ajax console or an SSH client application installed on your computer. For more information about Lish, including usage tips, see Using the Linode Shell.
If you need to quickly access Lish, use the Ajax Console to open it directly from your web browser. Here's how:
You are now logged in to the Lish Ajax console.
You can also access Lish with an SSH client application installed on your computer. Here's how:
You are now logged in to Lish via SSH.
This guide is licensed under a Creative Commons Attribution-NoDerivs 3.0 United States License.
Last edited by Sharon Campbell on Monday, April 7th, 2014 (r4371).