If I purchase a signed certificate for example.com, can I then produce sub-certificates for a.example.com and b.example.com?
These sub-certificates would have PEM files whose privacy cannot be assured.
Can I do this, maintaining the privacy of the root certificate while generating an unlimited number of disposable sub-certificates that would still be recognized as valid by the original signing authority?
There seems to be a hard limit on incoming calls set a certain way- a telephone engineer told me about this, but I don't know the specifics. When on a call, the moment the call hits 15 minutes it drops. Does anyone know the specifics of this behaviour, and how to change it?
How can I block Spotify on our company network? Unfortunately it's killing our bandwidth and the effect is really serious.
On our office network (26 people), some users have complained of poor Skype call quality, particularly in the upstream direction. I wanted to ask, how do I identify Skype traffic, considering that it uses a random port, in order that I might prioritise it at the router level?
Something like ec2-clone-instance or equivalent?
We've got suddenly quite high load and I want to drop another web node behind a load balancer, and I wasn't really prepared for this...
I should add that this an S3 backed instance.
I want to control who can download a file via an app (as if it was held on the local FS). What's the right approach for doing this, considering S3 can't be mounted as a POSIX compliant file system?
If I were logged into a remote machine as root with ssh -X, how would I go about viewing a particular X11 session that another logged in user was using? (that includes solutions such as remotely installing VNC)
Because frankly it's a bit tricky without...
The firewall in front of this server is blocking ping requests. Is is still possible to measure latency to this system? If so, how?
I have several remote developers and several servers on EC2. Is there a way I can centrally manage the authorized_keys file on EC2, rather than having to add keys manually on each server?
It is (of course) an EBS backed instance; I would like to see what the impact of having increased CPU power would do for it. What's the easiest way?
Due to a lack of power in a new office building, I am having to daisy chain strip plugs off a single socket.
Roughly speaking, how many amps does a desktop computer with screen consume?
How many might be safe to attach?
If I have a wired network with a DHCP-enabled router, do I need a wireless access point or a router to give wifi access to the office? Do all wifi routers have a mode for reverting to access points if the routing isn't necessary?
I've set up a proxy server on AWS in the US in order to allow me to browse the american internet from the UK, however I would like to hide this so that the reverse end cannot detect I am using squid. Is this possible, and if so, how?
I have asked this question before although the answer is no longer sufficient nor current. I would like to repost this question; how can this be achieved using Amazon's tools?
On htop, it shows three load averages, one bold, one normal, one red. What do they signify?
I'm trying to mount a device at /dev/sdf and I want it to be mounted for all users once the system has started. It is Ubuntu 10.04 Server.
I think the answer is something like /etc/rcS.d but I can't be certain exactly...
Many thanks, Chris.
Amazon has recently added the ability to use any server as an origin server for Cloudfront, removing the original S3 only restriction.
My question is- how do I set this up? The AWS web-gui seems to only support the S3 buckets (still), and the ec2 command line tools don't appear to have anything for registering a Cloudfront distro.
Any thoughts much appreciated!
Thanks, Chris.
I'm worried I might log in one day and my fully configured instance has been removed. I would like to be able to back it up daily to S3 but frustratingly this is not a simple setting in the console.
Is there a simple managed solution that can take care of backups, and should the unthinkable happen, allow me to simple restore it straight away?
I'm not sure what to do about this. When on a different IP (the same server set up, domain etc), we had no problems with email deliverability. Since transferring to EC2, despite having the AWS imposed SMTP limits removed, I'm finding that my server's email goes into my spambox. My site sends several hundred (legitimate, opt-in) emails a day. What do you think is the best solution here?
Chris.