21,461 reputation
12449
bio website ripple.com
location Oakland, CA
age 44
visits member for 3 years, 2 months
seen 8 hours ago

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


Mar
18
comment Could high MaxClient value cause CPU load issues no matter actual server stress caused by visits?
That load shortens CPU lifetime is a myth.
Mar
18
comment Using own NS for your domain
Note that if you don't register glue records with your registrar, this will form an unresolvable loop. "How do I find the name server for example.com?" "Ask ns1.example.com or ns2.example.com." "Okay, how do I find the IP address for those so I can ask them?" "Ask the nameserver for example.com." "That's what I wanted to know in the first place!"
Mar
17
comment Have a legitimate ssl certificate, but I fail at installing it
Most likely your crt files are DER, not PEM. Did you look at them? Do they look like PEM? Also, you may be confusing your certificate with the chain certificate. You really should look closely at the certificate files. You can use openssl x509 -text ... to dump the certificate.
Mar
17
answered transfer godaddy domain to linode
Mar
16
comment why is our router crashing?
The P661HW-D1 crashes if you exceed about 900 NAT entries. Clustering downloaders (like Bittorrent) can do this.
Mar
16
comment Nginx+apache2 ubuntu server crashed with several hundreds of visitors
What is the actual problem? What goes wrong? Do you get error messages? Are all the services still running?
Mar
16
comment why is our router crashing?
What's the router model? (P600 describes a series of about 16 routers.)
Mar
15
comment FreeNAS not using all installed RAM
Yeah, that rules out the first two. The third seems kind of unlikely. I think you have a mystery on your hands. Sorry I can't be of more help. Is there anything else odd in the kernel messages?
Mar
15
answered Used memory on Solaris 10
Mar
15
comment linux vlan routing
Do you have a router somewhere to route between these two subnets? How is 192.168.200.20 supposed to be accessed from the 192.168.100.0/24 nework? You say it doesn't work, but don't explain how/why it should work. Does 192.168.200.254 know how to reach 192.168.100.0/24 and 192.168.100.10/24 know how to reach 192.168.200.0/24?
Mar
15
comment cp from Linux to CIFS (windows) share mount is very slow
What are these two computers connected to exactly?
Mar
15
comment FreeNAS not using all installed RAM
I only know of three reasons this happens, and none of them seem likely in your situation. 1) Onboard video controller using the memory. 2) Incorrect BIOS settings making the memory unusable. 3) Kernel memory limitations.
Mar
14
answered Is there a way to limit RAM usage by daemon in Debian?
Mar
14
answered What and how to check when determining if a memory stick will be compatible with a particular server?
Mar
13
comment Is it possible to detect if visitors coming to my website are using a VPN?
You can't even reliably determine yourself if you are using a VPN.
Mar
13
comment Ubuntu server keeps running out of memory
Why do you think it's run out of memory? What's the symptom?
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