1,777 reputation
815
bio website perlmonkey.blogspot.com
location United Kingdom
age 39
visits member for 5 years, 5 months
seen Oct 7 at 14:14

I have been working as a Network Engineer and Systems Administrator in ISP/Telecommunications networks since 1996. I have extensive experience the BGP, OSPF, MPLS, IPv6, VoIP, ATM, DSL, QoS and many other TLAs.

I am married with a son and three dogs. I enjoy skateboarding, cycling, reading, music and pondering on the future of networking.


Jun
17
comment How exactly do name servers handle unknown subdomains?
+1 for Princess Bride reference ;)
Jun
17
answered Linux - use “su -” but keep the current directory
Jun
17
comment How exactly should I set up DNS to delegate authority for subdomains?
That is correct, although for real world lookups the vast majority of lookup decisions are going to be made based on records in the parent zone (i.e. the .com zone in this case). The NS records at the top level of the domain are actually largely cosmetic and there to maintain consistency (i.e. to make sure that when ns.provider-domain.com and a.gtld-servers.net are asked for the NS records for econemon.com they both give the same answer)
Jun
17
answered Creating a UNIX-based VPN: pointers, guidelines and pitfalls?
Jun
17
revised How exactly should I set up DNS to delegate authority for subdomains?
added 50 characters in body
Jun
17
answered How exactly should I set up DNS to delegate authority for subdomains?
Jun
17
comment Why is my email coming from a different domain or IP?
Unfortunately 3.6.7 is very loose in its definition. It doesn't define any of the keywords such as "from" or "by" or the order of the fields. Basically the RFC just says that anything goes up until the semi-colon. After the semi-colon is the date in a pretty flexible format.
Jun
17
answered Why is my email coming from a different domain or IP?
Jun
16
revised Issues with auth.log
deleted 1 characters in body
Jun
16
revised Issues with auth.log
added 168 characters in body
Jun
16
answered Issues with auth.log
Jun
16
revised Issues with auth.log
edited tags
Jun
16
answered Server load average is 25% in top
Jun
16
comment Server load average is 25% in top
I suspect these processes may be stuck in Disk sleep (state D in ps or top). If this is the case killing the parent will not help. AFAIK the only way to get rid of processes stuck in disk sleep is to reboot.
Jun
16
awarded  Commentator
Jun
16
comment Server load average is 25% in top
Can you clarify what you are seeing in the top? Are you seeing a single ls process, or are you seeing multiple ls processes? What Status is in the S column (R, S, D, Z, etc)? Is the folder on a local disk, or a remote mount (NFS,SMB, etc)?
Jun
16
awarded  Organizer
Jun
16
revised Server load average is 25% in top
edited tags
Jun
16
revised Can I have separate IP for A record & MX record
added 177 characters in body
Jun
16
answered How do I turn off the beep in the terminal in Linux?