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Dec
7
comment DNS using CNAMEs breaks MX records?
This is a common question and has been asked many times before. See this link for an example: serverfault.com/questions/18000/…
Dec
7
revised Why does psql attempt to connect with a different username when run from a Perl script
added 158 characters in body
Dec
7
comment Why does psql attempt to connect with a different username when run from a Perl script
Do you have anything set in the PG* environment variables or a ~/.psqlrc file? Are there any map entries in the pg_ident.conf file?
Dec
7
answered Why does psql attempt to connect with a different username when run from a Perl script
Dec
7
revised what does a cname record do?
edited tags
Dec
7
answered How well does Windows 7 Handle High Bandwidth-Delay Product Networks
Dec
7
asked How well does Windows 7 Handle High Bandwidth-Delay Product Networks
Aug
3
comment How to delete all hidden files and directories using Bash?
Be careful with that shorter version, it will give similar, but not identical results. It won't match names with two dots at the front (e.g. ".../" which is sometimes seen hiding rootkits, etc.)
Aug
1
awarded  Nice Answer
Jul
30
answered How to cut extension from pathname with basic unix tools
Jul
30
answered How to delete all hidden files and directories using Bash?
Jul
29
comment Making hosted applications resilient to BGP failures
Be wary of providers that will "cough up" a /24 or /23 of address space based on how much you are spending rather than demonstrable need. Chances are they are breaking the rules that they agreed to when becoming an LIR. Provision of Provider Independant address space is out of your service provider's hands. AFAIK no RIRs will make a PI assignment based on invoice size...
Jul
27
answered Slow internet bandwidth on Network
Jul
27
answered fiber to the desktop - which connector
Jul
24
comment What IP MTU sizes are seen in real networks
Previous comment should have read the IEEE have never standardised Jumbo frames. IETF have no remit to mess with the 802 standards...
Jul
24
comment What IP MTU sizes are seen in real networks
Jumbo frames of 9k are quite common in datacentres, especially if there are NAS devices present. Some ethernet vendors support jumbos of higher than 9k (largest I have seen supported is 15k) but 9k is the largest that is likely to be seen cross-vendor. Even the 9k figure varies from vendor to vendor (e.g. 9000, 9192, 9600). The sizes vary from vendor to vendor due to the fact that the IETF have never standardised Jumbo frames. The 802.3 standards all give 1500 as the largest supported payload.
Jul
20
revised Do entries in local 'hosts' files override both forward and reverse name lookups?
added 527 characters in body
Jul
20
comment Do entries in local 'hosts' files override both forward and reverse name lookups?
I haven't had a chance to look at the source yet; however a quick look at ldd output shows that on my system ping is linked directly to the libresolv DNS resolver library, which could imply that it is bypassing the nsswitch file and doing its reverse lookups directly...
Jul
20
answered Do entries in local 'hosts' files override both forward and reverse name lookups?
Jun
26
revised Are a RJ11 jack and a RJ45 socket physically compatible?
added 104 characters in body