Frequently Asked Questions (FAQ)
- 1 Can you set reverse dns?
- 2 Can you set my forward dns?
- 3 How can I repartition my domu's filesystem?
- 4 Can I upgrade my server later on?
- 5 Can I downgrade my server later on?
- 6 Can I change my billing period?
- 7 How much does a second ip address cost?
- 8 Why does the menu for the console say my server doesn't exist?
- 9 Why does nothing happen when I connect to the console from the menu?
- 10 I can't seem to ssh root@myserver
- 11 Logging in through the console makes my terminal act funny
- 12 Multiple xen consoles to the same vps act funny
- 13 In CentOS why can't I connect to port 80?
Can you set reverse dns?
Yes. By default the vps hostname and reverse dns is set to yourusername.xen.prgmr.com. we can set it to something else, if you like. To prevent Hanky Panky, we require that you set the forward dns first.
Can you set my forward dns?
We don't offer a dns control panel, but you can run webmin with bind or another dns server and control panel and we can have our server as a slave for your domain. You can also host dns with another provider such as your registrar. The only DNS we explicitly provide is username.xen.prgmr.com
How can I repartition my domu's filesystem?
See [[Repartition|our page on repartitioning.
Can I upgrade my server later on?
Yes, we can give you more memory and disk and you just have to halt and create the server again once the configuration is made. We will change the allocation policy from contiguous to normal for the extension operation so the extended disk will be non contiguous, but it is still all on one physical volume which is a linux kernel raid 1 mirror. We can also give you a second disk contiguously allocated if you want. Once the disk is extended, there are several ways to repartition using the new space. You can make a new partition and filesystem just on the new space, and move /var or /home to it for example. You can backup your existing filesystem(s), delete the partition, and make a new bigger one with a new filesystem(s) and restore from the backup. A risky and unreliable choice is to resize the existing filesystem. Parted can do this for certain filesystems. WE DO NOT RECOMMEND RESIZING THE FILESYSTEM. USERS HAVE LOST DATA. If you want to reinstall you can untar one of our os images.
Can I downgrade my server later on?
Yes. Because of the problems with resizing filesystems, we reinstall the OS image after downgrading the disk.
Can I change my billing period?
You can change your package to one with a different billing period by logging in to https://billing-external.prgmr.com. If you want to change other package details (memory, disk) be sure to let us know.
How much does a second ip address cost?
We charge a $5 yearly fee, and you must give us justification so that our space is being used well. Good reasons include running a STUN server and SSL certificates. Bad reasons include making one vps look like two authoritative dns servers for a domain, or SEO tomfoolery.
NOTE: Currently, we have a hold on extra IP addresses. See http://wiki.xen.prgmr.com/xenophilia/2010/06/roadblock-in-getting-an-arin-a.html
This doesn't mean your disk or other setup is gone, only that the domU is shutdown. This is because the xend management process on the dom0 doesn't know the status of your domU when it is shutdown.
When you connect to the console it only shows you the output since the last time someone looked at the console. If there hasn't been any output, press enter and you should get a login prompt.
I can't seem to ssh root@myserver
permitRootLogin is set to no in /etc/ssh/sshd_config. I strongly reccomend that you leave that setting, create a non-root user, ssh in as the non-root user and then use su or sudo. You can change permitrootlogin if you must, but make sure you have a strong password.
Logging in through the console makes my terminal act funny
The "emergency console" is very picky. It needs to be 80x24 (or 80x25 or so) otherwise it gets very unhappy. You probably shouldn't do most of your work through that. Create a regular user, ssh in and do your work over ssh. After you disconnect from the xen console you can run reset to make your terminal normal again, or just close it and open a new one.
Multiple xen consoles to the same vps act funny
The xen console doesn't work well at all with multiple access, but there is no locking. Several terminals can attach, but output from the vps will only go to one. For most tasks its better to use ssh, the xen console is most useful when there is no normal network access to the vps, such as when reinstalling.
In CentOS why can't I connect to port 80?
The default firewall configuration in our CentOS image only allows connections on tcp port 22. To allow connections to port 80, or any other port number, run
iptables -I RH-Firewall-1-INPUT 10 -m state --state NEW -p tcp --dport 80 -j ACCEPT
with the port number after --dport. You can also configure the firewall by running system-config-securitylevel-tui.