21,361 reputation
12349
bio website ripple.com
location Oakland, CA
age 44
visits member for 3 years, 1 month
seen 5 hours ago

I am Chief Cryptographer at Ripple Labs and one of the architects of the Ripple payment system.


Mar
13
comment How to investigate a memory leak with Apache and PHP?
What is the actual problem? Is performance poor? You're telling us symptoms without explaining what problem we're supposed to be helping you solve. (And what is this swapping issue you're talking about? Are you swapping so much it's impacting performance?)
Mar
13
comment What might cause https failure when not specifying SSL protocol?
If you can tell us the actual server, we can replicate the problem and look at the packet traces. Otherwise, we're going to have to guess.
Mar
13
answered Ubuntu virtual memory caches suck up memory
Mar
13
answered TCP what's the purpose of the third step of 3-way-handshake
Mar
13
comment IP vs domain name when setting custom name servers
I can't figure out how this question could make sense. In what case do you have to choose between using a domain name or using an IP address?
Mar
12
comment Increasing server storage space
Are you looking for help on adding additional physical drives? Or help on finding what's using up your space right now so you can delete it or clean it up? Or help on changing the configuration so space that's currently used for some other purpose is available for storage? Or what?
Mar
12
comment How do I make sure I have dedicated SSL for my site on a shared server?
It could, but it could also mean the web server needs the site name as well as the IP address to find your site.
Mar
12
comment IP segmentation occouring at irregular boundaries
I just noticed that the title of your question doesn't seem to relate to the body of your question at all. What does the body of your question have to do with "irregular boundaries"?
Mar
12
answered How do I make sure I have dedicated SSL for my site on a shared server?
Mar
12
comment Hotmail wants me to modify my SPF record
The exact answer will depend on why the ptr is in there. If it was added for no particular reason, it can just be removed. It was added for a particular reason, some other way to do whatever made it required will be needed.
Mar
12
comment IP segmentation occouring at irregular boundaries
Well, one thing that's definitely off is that the MTU has to include the IP header as well as the data. Each packet has an IP header that cuts into how much data it can carry.
Mar
11
comment Apache on linux with two real certificates (.com and .co.uk)
What are you trying to accomplish? What problem is this the solution to? (Also, this won't work if both services are using the same IP address. SNI is not production-ready yet.)
Mar
11
comment swap partition alignment: is there any benefit?
The system may dribble swap out under normal load a bit. But the system shouldn't swap enough for swap performance to make any difference at all. But there is a myth that literally no swapping should occur under normal load, and that's false for precisely the reason womble mentioned.
Mar
11
comment How can I find out what user from a specified IP is doing with my server?
You should always keep logs like this, and make sure to also keep a timestamp of when the log was created that is as exact as possible (with the time zone).
Mar
11
comment How can I find out what user from a specified IP is doing with my server?
What service were they connecting to?
Mar
11
comment Apache rewrites custom reason phrases in HTTP header to a standard one
Check the logs for your customer's server. It's most likely not ignoring the additional message but in fact encountering an internal server error.
Mar
11
comment D-Link override DNS for all computers on network?
Unfortunately, there is no open source software for it because it uses the Ubicom IP5160. You're stuck with the factory firmware.
Mar
10
comment Redirect to port based on requested (sub)domain (1 IP, non-HTTP request)
What protocol? You only told us what it's not. That's not helpful.
Mar
10
comment Problems with time correction on Debian
The system does not assume that everyone using it is in the same time zone the system is in.
Mar
10
comment Configuring multiple servers to share one static IP using subdomains
Access them with what? A browser? Is this an HTTP question?