21,491 reputation
12449
bio website ripple.com
location Oakland, CA
age 44
visits member for 3 years, 2 months
seen 14 mins ago

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


2d
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
20
answered How does my registrar (Namecheap) let me set up a CNAME record on the apex domain?
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?
Oct
3
awarded  linux
Oct
2
comment How does NAT handle multiple computers contacting the same external IP at the same time?
@Ajedi32 No, it also has the destination port of the reply. NAT handles multiple computers contacting the same external IP at the same time the same way your computer makes two connections to the same web server (same IP and destination port) at the same time -- it uses different source ports.
Sep
30
comment Static routing on CentOS through managed switch
You're trying to solve the wrong problem. The problem is not routing these packets to the Internet, that's easy. The problem is getting the replies back.
Sep
29
comment “Lock” a certain user to a certain user in SSH (Cygwin)?
What's the purpose of the user having SSH access? What is he supposed to be doing?
Sep
27
comment Service port accessible only by one network card
What error does the service return?
Sep
24
comment How can I have ntpdate ignore skew?
You have to bring it up to date. Modify the $cmd line to what is appropriate for your platform.
Sep
24
revised PING to my site url returns 100 percent but my site is still up and working
added 181 characters in body