3,861 reputation
916
bio website
location London, United Kingdom
age 43
visits member for 5 years, 1 month
seen 21 hours ago
Quite boring, really. Have faffed about with computers since the mid-80s, have worked as a network engineer, unix sysadmin and (occasionally) developer.

Mar
7
answered What can I do if my organization is running out of IP addresses?
Feb
28
comment Securing the network: IP conflicts and its solutions
MAC addresses are (typically) not randomly picked on boot.
Feb
6
comment Networking wlans and vlans
prats: That looks like two different interfaces and if you want them routed as a unit, you need to bridge between them, so a BVI.
Jan
5
comment Cable Management
I started out thinking zip ties were the perfect answer, but have eventually come around to the idea that zip ties are really good for infrequently-touched equipment racks. When you're in the rack, making modifications to the cabling (by installing, uninstalling and/or moving kit), velcro is a much better idea.
Jan
4
awarded  Enlightened
Jan
4
awarded  Nice Answer
Dec
21
comment Is Selling Old Cisco Routers a Security Issue?
The RJ-45-contacted cable is a roll-over, so the pins are connected 1-8, 2-7, 3-6, 4-5. Trivial to make and there are RJ-45 couplers tha timplement a rollover, so you can just take two ethernet cables with the coupler in-between.
Nov
23
revised How to configure S3 or DNS to handle incomplete name (sans www) for web site?
put URLs in "code blocks" and some copy-editing
Nov
21
answered What does mdev mean in ping(8)?
Nov
19
comment Regex working in RedHat is not giving any result in Ubuntu
I think you're using a glob rather than a regex...
Nov
2
answered What happens if one BGP peer only gives me a default while the second peer gives me the full table
Oct
31
comment linux + run some script without “./” + alias
The PATH variable should never point to individual binaries (or scripts), only to the directories they're contained within.
Oct
28
comment Is it possible that this email was sent when the sender claims?
@peter nixey: I'd prefer to not speculate on that. :) I've speculated on the possibility, but as far as "probability" and "plausibility", I'd really want to know the human actors good enough.
Oct
28
comment Is it possible that this email was sent when the sender claims?
If the problem was, say, "the DSL link was broken for several weeks" (or "unstable enough that it never completed sending the email"), possibly. The DSL situation in Britain is... interesting. There are usually multiple parties involved, the ISP providing the connection to the internet at large, the ex-monopoly telco (or another operator!) providing infrastructure to haul the traffic from the consumer to the ISP and (sometimes, but that is probably pretty rare) another provider of the last little bit of cable (more "the last few yards" than "the last mile").
Oct
28
answered Is it possible that this email was sent when the sender claims?
Oct
26
comment cisco - enable port automatically if conn lost?
As an extra safety precaution, I tended to make a second (post-change) connection to the router, to issue the "reload cancel". That way I know that authentication still works.
Oct
25
comment running command with sudo gives different result
It's equally efficient to do something like: ps -aef | grep [x]inetd The square brackets around the x indicate 'match the character class that only has an x' so /[x]inetd/ match "xinetd" but not "[x]inetd".
Sep
1
comment How many computers can have the same public IP?
@Ian Boyd: The complete identifier for a TCP session is <src ip><src port><dst ip><dst port> and with sufficient state in the NAT table, you can share either src or dst port if the other one is different. It's not usually done that way, though (thus things like "cone-shaped NAT" working most of the time).
Aug
19
answered linux red-hat how to find IP address of cisco switch?
Aug
5
answered Routing VoIP and Internet traffic