21,541 reputation
12449
bio website ripple.com
location Oakland, CA
age 45
visits member for 3 years, 3 months
seen 5 hours ago

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


Nov
20
comment Setup network between 2 computers connected using wifi
You're getting downvotes because this is a site for professional network engineers to discuss problems they experience in professional system administration. Questions like "how can I connect two computers together" belong on different sites.
Nov
19
comment Realtek dongle not working on beaglebone
You kind of stopped. What are you trying to do? What happens when you do it? What help would you like?
Nov
14
comment Do routers verify UDP and TCP checksums?
Are you asking what real world routers actually do? Or are you asking what is officially part of the definition of what a router does?
Nov
4
comment Would 6 SSD's in RAID 0 last longer than a single large SSD?
"To my understanding, the main factor for SSD's to fail is constant reading/writing to the drive." That's simply not true. While that's certainly a way SSDs can fail, it's extremely unlikely for a modern SSD to last long enough to reach write exhaustion with typical usage.
Nov
4
comment 3ware 9500 stopped showing up in Linux
If the data wasn't worth the minimal effort of backing up, it's surely not worth the major effort of recovery.
Nov
4
comment 3ware 9500 stopped showing up in Linux
With a system that old, I'd just replace the hardware and restore from a backup. It's very unlikely that troubleshooting or repairing hardware that's that old is going to be cost effective.
Nov
3
comment why online tools can not find my MX record?
When you say "on my server", what precisely do you mean?
Nov
1
comment TCP/UDP Small Package Size optimization
You kind of didn't tell us what your question is about. What software are you using? What hardware are you using? How are you measuring? What does your CPU load look like?
Oct
29
comment Server time won't remain set
There's absolutely no useful description of the problem here. Is it the timezone that won't stay set or the time? If the zone, what does it change to/from? If the time, does it stop? Jump forward? Always become off by the same amount? Or what?
Oct
21
comment Linux not freeing large disk cache when memory demand goes up
The problem is that without swap, overcommitting results in the OOM killer running and not overcommitting results in a system that can't launch processes. You need swap to make effective use of RAM.
Oct
20
comment Why in 64 bit machine not able to use whole free memory as disk cache. Facing sudden disk cache drop
Do you have an actual performance problem or is this purely a cosmetic issue?
Oct
20
comment Is it valid for a hostname to start with a digit?
Thank you, 3com.
Oct
20
comment How does my registrar (Namecheap) let me set up a CNAME record on the apex domain?
@tobek I tried to get an authoritative response and could not get one. Testing tools were unable to get one either. It happened to work when you tried it. The rules specifically prohibit it. Either you're happy with that or you're not. If you're looking for some kind of guarantee, you're not going to get it. It's not supposed to work.
Oct
20
comment How does my registrar (Namecheap) let me set up a CNAME record on the apex domain?
@tobek You're kind of missing the point. It doesn't make one bit of difference what tools your users use. Their browser is going to ask some DNS server to resolve your domain name to an IP address. That DNS server could be using any software.
Oct
20
comment How does my registrar (Namecheap) let me set up a CNAME record on the apex domain?
@tobek If you're satisfied with "it happened to do what I want when I tried it", then fine. But it is not supposed to work, and when I tested it, it did not work. I was unable to get authoritative DNS results.
Oct
14
comment Load Balancing over multiple ISP connections
You should clarify your question with the details of what you tried, what you observed, and what your goal is.
Oct
14
comment Load Balancing over multiple ISP connections
What do you mean by "a connection"? Do you mean a TCP connection?
Oct
9
comment How can I host multiple websites from the same Windows 2008R2 server?
Note that "upstream" can be a VM hosted by the Windows machine.
Oct
9
comment How can I host multiple websites from the same Windows 2008R2 server?
The rule you state in your last paragraph is the wrong rule. For one thing, how would it work if a packet is not a reply? What you mean is this: For an outbound packet whose source address is bound to interface A and whose destination address is not covered by a more specific route, send the packet using the default route whose next hop is reached through interface A. (And the same for interface B.)
Oct
6
comment Failed to ping through gateway which is not default gateway
You do understand that ping -I and traceroute -i do completely different things, right?