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visits member for 5 years, 5 months
seen Nov 20 at 18:26

May
16
comment Fixed dhcp host to automatically expire any lease
No. It's easy enough to script adding a fixed-address and releasing any active leases for that MAC, though.
Jan
4
comment Null MX records
The host at the A record isn't mine; so I was wondering if I could do it entirely via DNS. This does, however, make the most sense.
Dec
19
comment Unequal Cost Load Balancing via MPLS TE
So basically, to get the UCLB, all routes need to be announced to flow through a single device, and thus needs to handle all external announcements into the OSPF LSA fabric. These tunnels are simply one-way interfaces from a routing standpoint, and without explicit routing thable entries the routers aren't going to do anything 'magical'. Think I get it, thanks.
Dec
15
comment Unequal Cost Load Balancing via MPLS TE
Also, if I simply advertise Site A from Site B in the three locations, the two routers directly connected to Site B and the router in Site A that handles the two Site A -> Site B tunnels, I should be able to get around configuring a default gateway in site A, if I'm visualizing this correctly?
Dec
15
comment Unequal Cost Load Balancing via MPLS TE
In fact, that article is what I read prior to doing this. There is no real 'main' router at site B and if at all possible I'd like to have redundancy as well so that in case the router that is load balancing the traffic goes down that Site A is still routable from the network. Would this be best served by just announcing the tunnels with a small cost, letting it serve as the shortest path from site B, then if the router goes down letting the other OSPF routes take over? i.e., should I be viewing the tunnels as a shortcut of sorts advertising least cost between sites?
Dec
15
comment Unequal Cost Load Balancing via MPLS TE
Yeah, it's on the diagram to show a planned link. The main purpose of this is to route types of traffic between A and site B and A and the internet over one of the two available connections. Yes, it is intended to be bidirectional and I do realize I need to set up each half on the appropriate locations.
Sep
22
comment Linux - Is there a way to determine what mac addresses an interface has seen traffic from?
Yeah, like I thought there's nothing built into a base linux kernel that's going to do this sort of thing; the best bet for implementing this is packet capture & logging Ethernet frame MACs. Though it's unsuitable for my purposed; it's the answer.
Sep
21
comment Linux - Is there a way to determine what mac addresses an interface has seen traffic from?
Like I stated in the question arp will not work; it's a glue between IP and Ethernet and thus requires that the IP address is recognized as valid in order to set up the glue. If an interface sees broadcast traffic sourced outside of configured networks on the interface it's not going to bother trying to set up the arp table entries for it.
Sep
21
comment Linux - Is there a way to determine what mac addresses an interface has seen traffic from?
Yeah, unfortunately packet capturing for a period of time and filtering the results isn't an option for this case. I'm looking for something more at the driver level that logs seen traffic and not something that needs to be done interactively.
Apr
29
comment Is there a Windows app out there that can pipe command line arguments into a TCP socket connection?
Actually, that might be doable. Always forget about good 'ol .bat.
Apr
29
comment Is there a Windows app out there that can pipe command line arguments into a TCP socket connection?
Unless that host isn't Windows.
Apr
28
comment Is there a Windows app out there that can pipe command line arguments into a TCP socket connection?
Somewhat. I've edited in my reservations about netcat.
Oct
8
comment Wireless Access Points with API
They're also configurable via an API, to there's no need to mess around with a SSH interpretation layer.
Sep
2
comment Wireless network between buildings
Sorry about seeming so hostile, every time I see 'cantenna' I think of pringles cans and crap quality. It's not directed at you. I'm speaking from experience about yagis -- I've had the issue myself during ice storms, and have heard anecdotal evidence of others with the same issues. As for kitbashing antennas, I'd rather spend the money on a decent panel antenna (Say, like one of the results in google.com/search?q=16dBi+panel+antenna+2.4+ghz) than taking the time required to make a equivalent-quality homemade antenna.
Sep
2
comment Wireless network between buildings
Because $50 for a decent panel antenna is just too much to spend when you can go with kitbashed aluminum-covered cardboard.
Aug
28
comment Wireless network between buildings
How far apart are the buildings? Do you have a clear LOS between them?
Aug
28
comment Wireless network between buildings
Avoid yagis for outdoor use. If you're located anywhere the temperature drops to freezing, they can get coated in ice and detune. While a radome helps, quality yagi antennas with a radome tend to cost as much as an equivalent gain panel antenna, and are more unwieldly to install and align.
Jun
22
comment How can I alternate between multiple TCPIP configurations for my network adapter? PowerShell?
This is exactly what you want to do. Dump your config to a .conf file, and make a bat that feeds the conf back into netsh via the command line. If you want, you can get fancy by having a batch menu come up to prompt for a location and find the appropriate .conf file. Otherwise, just make a batch file for each location. I've got laptops set up to switch between DHCP and loading a .conf with multiple static addresses for communication on a network where we don't pass addresses out via DHCP.
Jun
17
comment Bash regular expression question
By the way. try running 'ps -ef | grep -c [j]ava'