290 reputation
16
bio website
location Atlanta, GA
age 31
visits member for 1 year, 9 months
seen 2 days ago

Atlanta area UNIX admin with a focus on LDAP, DNS, PAM, and just about any form of server troubleshooting that does not involve looking at source code. I currently work as the DNS lead for a nationwide enterprise.

In my spare time I play computer games and pretend to be a C programmer. I think it's important to at least have a passing knowledge of the language, otherwise we contribute to the decline of classically trained UNIX sysadmins.

Awesome stuff I use:
tmux
lsof
strace
cgdb
valgrind
vcXsrv (avoid XMing: its author is a Wikipedia vandalist, and vcXsrv has better clipboard support besides)

Books I recommend:
Advanced Unix Programming, 2nd Edition
The Essential Marcius Aurelius
The Single Unix Specification, Version 3 (if you're a masochist)


Sep
23
comment Why would xbcd.com resolve to the localhost (127.0.0.1) on Linux (Ubuntu) and Android?
For that matter, there's nothing to stop you from returning a NS record with private IP space (127.0.0.1, 10.0.0.1, etc.) and tricking a recursive nameserver into passing queries along. BIND does not make any assumption about what IP spaces are bogus for authoritative lookups, and it must be specifically instructed to discard these NS records via the server directive.
Jul
25
comment How to ignore a specific SMART error
To use an analogy, this is the equivalent of asking how to make a smoke detector ignore a fire that hasn't spread from the bedroom yet. Get out of the house already.
Apr
28
comment Why do DNS service discovery queries for private networks get sent to my ISP?
The in-addr.arpa suffix made this a reverse DNS question at its core, particularly because you were also inquiring about prisoner.iana.org -- the blackholing servers. At that point I was trying to tool the question toward being reusable for future dupe-closing. Regarding topicality, this involved observations made on a personal device, and reverse DNS (in-addr.arpa) leaking out to your ISP. Please consult meta.SF if you have further questions, this has been discussed exhaustively.
Apr
28
comment Why do DNS service discovery queries for private networks get sent to my ISP?
This is off-topic for ServerFault. I'm going to answer anyway because I don't see a dupe close candidate on SuperUser. (where this should be migrated to)
Jan
22
comment Onenote shortcut to change mouse cursor from pen mode to text mode
URL link is dead.
Aug
10
comment 501 Not Implemented error
Potentially, but it also changes your starting point. This is a very unusual response and very unlikely to come from a stock Apache config. It's likely an interaction with something else within the development environment, which isn't topical for us to pursue here.
Aug
10
comment 501 Not Implemented error
WAMP is not considered very on-topic for ServerFault; refer to this and this. I'm flagging this for migration.
Aug
2
comment no internet while downloading torrents - seems dns related
RE: tcpdump... tcpdump -i ethX -n -s 128 port domain
Aug
2
comment no internet while downloading torrents - seems dns related
Confirm the contents of resolv.conf?
Aug
2
comment no internet while downloading torrents - seems dns related
Keep in mind that this is DNS...UDP carries the majority of the weight, unless we're dealing with oversized queries. (i.e. EDNS)
Jul
3
comment Apache DNS Resolves Slow on Route53 Configuration
Your authority is fine, I ran the SOA query against www. instead of the base domain. Answer has been edited.
Jul
3
comment Apache DNS Resolves Slow on Route53 Configuration
@Michael I can, and +trace works, but something is jacked on these DNS servers. I've elaborated within the answer.
Jul
3
comment Apache DNS Resolves Slow on Route53 Configuration
@Michael Pardon? I can resolve all of them just fine. That did leave to discovering the actual problem though...
Jul
3
comment Apache DNS Resolves Slow on Route53 Configuration
There's a disconnect between your perception of a problem and your proposed path to correcting it. A delay in resolving a DNS entity in this scenario occurs somewhere between a client computer, the caching DNS server it points to, and the authoritative DNS server that contains the answer. Nowhere along that path does httpd get involved, as your virtualhosts are not trying to resolve anything. I recommend focusing on the actual problem you see (i.e. show us the DNS query failing).
Apr
24
comment Bad owner or permissions on /root/.ssh/config in a virtual machine
@sethcall This was migrated from ServerFault awhile back, so the original context had to include production environment standards.
Apr
7
comment I'm being redirected to a parking site when dns resolution fails
@Matias It's possible that your DNS server or the machine acting as the network's default gateway has been compromised.
Mar
31
comment Is my SSD drive going bad? SMART error
That's a little bit better. Note that the detailed output wasn't necessarily a bad thing, it's just a good idea to identify outside of it what message was concerning you so that people have a point of reference.
Mar
31
comment Is my SSD drive going bad? SMART error
I can find the error. My point was more that if your presentation requires people to search the entire output to find the message that may be concerning you, many people aren't going to take the time to look for it.
Mar
31
comment Is my SSD drive going bad? SMART error
"Here's a wall of text, do I have a problem?" isn't one of the best presentation methods. In future questions, try to identify what it is you saw within the output that caused you to be concerned.
Mar
16
comment Need to find which drives are mirrored within RAID-10 array
@poige This falls under anything in a home setting. I tried to make it clear that I considered the question adequately researched despite this.