3,981 reputation
918
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location London, United Kingdom
age 43
visits member for 5 years, 6 months
seen 2 days ago
Quite boring, really. Have faffed about with computers since the mid-80s, have worked as a network engineer, unix sysadmin and (occasionally) developer.

Sep
17
comment find command default sorting order
Well, the flash card probably uses a FAT file system and if I remember correctly, manipulating the order of FAT entries is pretty easy with a file system debugger. It may, possibly, be worth copying the songs from the current flash onto a new flash, in the order you want them played, that may be easier.
Sep
15
comment Simplest way to do failover routing with Dell PowerConnect core switch
OSPF or RIP would probably both do. Of those, I'd pick OSPF, since RIP (while useful in some situations) is kinda slow and has interesting corner cases.
Sep
15
comment Simplest way to do failover routing with Dell PowerConnect core switch
Also bear in mind that it is not always simple for a device to know that "the next hop" is down. If it's on a dedicated L3 port, unplugging the cable is a clear indication to the device that the next hop is unreachable, but if it's part of a /24, you're essentially trusting ARP timeouts to be fast enough (unless, of course, you have dynamic routing in place for the "next hop", but then you may as well go full dynamic routing).
Aug
31
comment How to remove second ip address from vlan interface on switch
That looks correct to me and it's only been two days since I last removed an IP address from a Cisco device.
Aug
31
comment What must be done in order to configure IPSec for a domain?
Fair enough. I don't normally deal with Windows machines other than as a user and mostly see IPSec as GRE packets flying through the core network.
Aug
18
comment Hardware Serial number
Static "burned-in" MAC addresses are usually assigned using a PRNG for the lower bits, so you're pretty unlikely to get two identical MACs from the same production lot, but duplicated hardware MACs (without spoofing) do exist in the wild, I have seen it myself.
Aug
18
comment Different behaviour of netcat from telnet when connecting to public route server
@vasilis, the sending of space is primarily there to fool Quagga into believing there's something of interest happening. Not tried it, so I can't say it would work, but certainly worth a try.
Aug
9
comment Linux: make shutdown not executable for safety
Don't forget "kill". After all, "kill -9 1" is a pretty effective way (or, well, used to be, back in the days) of shutting a unix box down.
Aug
4
comment Recommendation needed: IVRS + VoIP solution in Linux
Asterisk supports (at least) SIP and SCCP ("Skinny") more-or-less out of the box, so unless you have a very unusual environment, you should be good to go.
Aug
2
comment connecting two networks by a router
There can also be collisions on a half-duplex link (unfortuntaly, I do see a fair few of these still in production in a variety of customer networks).
Jul
27
comment Routing my home traffic to another server instead of ISP's default routes
You'll get the packets sent in the right direction, but after that, they'll be routed based on the destination IP address, not what you want as a next hop. A tunnel encapsulates your IP datagram as a payload in another IP packet, with the tunnel termination point as the DST address in the encapsulating traffic.
Jul
21
comment UTP cable maximum length
You can run into problems with resistance on distances that start approaching 110-120 metres, especially if there are patch panels involved. Worth a try, but I'd suggest having a simple hub or switch on standby, if it doesn't work.
Jul
6
comment Network setup help
And enable IP routing (IIRC it tends to be disabled by default). The relevant file in /proc is /proc/sys/net/ipv4/ip_forward and 0 indicates "no routing", whereas 1 indicates routing.
Jul
2
comment Have NetFlow show true destinations
MOst Cisco routers should be able to export NetFlow data. I've used various collectors, both FOSS and commercial.
Jun
16
comment Finding all IP ranges belonging to a specific ISP
Depends. There are looking glasses where that sort of thing can be found and anonymous route servers. Have a look at traceroute.org
Jun
11
comment What is the best way to connect 3 switches with a router?
No, you must have STP on all switches in the network for STP to be effective. Otherwise you will get bridging loops.
Jun
10
comment Why are external domains appearing in my apache logs?
You need to issue "GET example.com HTTP/1.1" as the request to initiate proxying, try that and you'll (probably) see it in the log.
May
30
comment Can I subnet a subnet?
massimo: "Proxy ARP". As long as the router where the x.176/28 replies to ARP requests on its "WAN side", it'd work. I, personally, wouldn't do it that way, but that doesn't mean it's impossible.
May
24
comment How remote warfare works when even my satellite TV and remote server has latency?
Geo-stationary orbit is much closer to Earth than the Lagrange points (three in lunar orbit, one just slightly closer than lunar orbit, one noticeably further than lunar orbit).
May
14
comment Can a Linksys Router be the cause of bad speeds on a 1.5 mbps link?
If you have the same OpenID details on both sides, there will be a "I am also X on this other trilogy site" on the [Accounts] tab. where you can link them up.