356 reputation
311
bio website
location Houston, TX
age 31
visits member for 3 years, 6 months
seen Oct 24 at 20:25

Systems Engineer & Software Developer


Aug
28
comment Can TCP and UDP packets be split into pieces?
Might be worth clarifying the last bit for novice readers: you will see the complete data for the datagram in question. If any one of the split packets gets lost, the datagram is lost and the UDP layer will never know of it. As long as all packets in the datagram are received, they will be assembled at the IP layer and then passed up to the UDP layer. This doesn't preclude the possibility of missing "chunks" in the datastream. Not to be a pedant, but when I was learning this stuff I didn't grok the difference between IP frag and UDP loss until the 2nd or 3rd pass through the textbook.
Aug
14
awarded  Necromancer
May
20
awarded  Caucus
May
20
awarded  Constituent
Mar
28
comment Why does a hardware router perform better than a Linux router with better specs (RAM & CPU)?
+1. Add to that the fact that Cisco has the engineering resources and know-how to replace software with hardware when needed. Meaning, if a particular operation is slower than they'd like in software, they can put effort into engineering an ASIC, adding instructions to their existing processing units, or build a hardware module to help speed it up. The tables tip overwhelmingly in favor of performance when you have the luxury of controlling both the software and the hardware.
Mar
8
awarded  Revival
Mar
7
revised Ubuntu: disable udev's persistent-net-generator.rules
Added "empty file" variation.
Mar
7
answered Ubuntu: disable udev's persistent-net-generator.rules
Dec
17
comment Forwarding udp ports iptables packets “lost”?
@SeanC: iptables does have logic to allow it to track UDP conversations‌​.
Dec
6
answered Change the port number of outgoing packets originating from local process
Dec
4
answered Access device with local ip over internet
Nov
27
comment CentOs vhost shows default apache page
@Bernhard: See my edit. You have a permissions problem, run the command at the end of my answer to fix it.
Nov
27
revised CentOs vhost shows default apache page
Added bit about checking folder permissions, and included a specific resolution to OP's problem.
Nov
27
comment CentOs vhost shows default apache page
@John: Answer edited, though I have to play devil's advocate here and ask: Why would anyone want to re-enable SELinux? :)
Nov
27
revised CentOs vhost shows default apache page
added 48 characters in body
Nov
27
answered CentOs vhost shows default apache page
Nov
14
awarded  Yearling
Nov
6
answered Is there a negative impact to using SQL Server with a lower compatibility level
Oct
24
comment What's the best way to check if a volume is mounted in a Bash script?
Possibly worth mentioning: if you use /proc/mounts at a lower level than a shell script (say, parsing with Perl or Python), you must remember that /proc/mounts is only atomic within a single call to read() -- so be sure to read the entire file and then parse it, rather than relying on parsing line-by-line from the file handle itself.
Oct
23
revised Which services to disable on a CentOs 5.8 web/database server?
added 407 characters in body