21,288 reputation
12347
bio website ripple.com
location Oakland, CA
age 44
visits member for 3 years
seen 11 hours ago

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


Jul
2
comment SSH tunnel speed is very slow
I'd look closely at your SSH options. Perhaps you can choose a faster encryption algorithm, for example.
Jul
2
comment Should DNS A timeout to result in permanent email failure?
When you say "host not found", are you talking about a DNS timeout? Or an authoritative statement that the host does not exist? The former should not be fatal -- DNS outages are not uncommon. The latter should be.
Jun
30
comment Changing memory allocator to Jemalloc Centos 6
You can look at /proc/<pid>/maps to see if libjemalloc.so is mapped.
Jun
30
comment Port forward remote desktop without a gateway over 3G modem router
Have the router MASQUERADE incoming traffic to 192.168.1.33 temporarily.
Jun
29
comment Ethernet switch signal quality
You can also use intermediary switches for longer runs, but there are various disadvantages.
Jun
24
comment Can one server see traffic to another server inside a VLAN?
As I read the question, his concern is about other servers that are in the private VLAN. He says "... are other servers on that private network that might be able to sniff ..."
Jun
24
comment Can one server see traffic to another server inside a VLAN?
When you say "any of the other servers", do you mean other servers in the private VLAN? If not, what "other servers" do you mean?
Jun
23
comment linux tc htb bandwidth ceil being ignored and giving improper results
Throttling the outbound is slowing the inbound. You need an IMQ to sensibly rate limit inbound traffic.
Jun
21
comment How am I able to assign an IP to a bridge interface
Or you can think of a bridge like a switch, and the machine with the bridge has an interface connected to that switch too.
Jun
21
comment linux tc htb bandwidth ceil being ignored and giving improper results
Do you have an IMQ? Otherwise, this won't work. "With linux only egress shaping is possible (except for the ingress queue which can only do rate limiting). IMQ enables you to use egress qdiscs for real ingress shaping."
Jun
19
comment CentOS only detecting 50% of ram on IBM Server
What does the BIOS show? What does memtest86+ show?
Jun
18
comment What is a T1 in modern terms?
I still have a T1 to my home in Murphys, California. It's out of DSL range, so that leaves as the only other options, satellite or dial up. (Comcast says it would cost about $5,000 to run a line to me because local regulations require it to be buried and there's a highway in the way.) Satellite has lousy upload speed and atrocious latency. A t1 is way better than dial up.
Jun
18
comment Route public subnet to client location
What the challenge with doing it with OpenVPN? That's a pretty basic VPN task.
Jun
18
comment Network latency caused by incorrect cable?
If it's a brand new crossover cable that was intended to be used with a gigabit device, it's unlikely to be the problem. (Though I can't understand why anything would ship with such a cable. Modern devices universally have auto-MDI/X and don't need it.)
Jun
18
comment CentOS - binary won't run unless typed with absolute path
You can use strace to see what the program is doing or looking for.
Jun
18
comment Network latency caused by incorrect cable?
Let's say it's wired correctly for gigabit, but can't run reliably at gigabit speeds because it's an old cable that's poorly made. I wouldn't rule out the cable. Because crossover cables have been obsolete for a decade or so, it's very likely to be a piece of junk by modern standards.
Jun
18
comment Network latency caused by incorrect cable?
Whether or not they won't work at all depends on the configuration. I think you're right that with a default configuration at both ends, it probably won't work at all (at least on most devices). But I wouldn't assume that the defaults haven't been changed.
Jun
18
comment Network latency caused by incorrect cable?
I don't believe this answer is correct. The vast majority of crossover cables don't work with gigabit Ethernet. I suspect this is because most crossover cables predate gigabit Ethernet and so don't comply with the gigabit crossover standard (which requires all pairs be swapped).
Jun
18
comment Port Forwarding on Cisco Router
That's very strange, because connection refused means that something is refusing the connection.
Jun
18
comment What does “1-gig switch port” mean in co-location terms?
The "500 GB total monthly transfer" suggests that there is no 95th percentile billing policy but that instead the limit is on the total data sent/received per month.