199 reputation
6
bio website klatha.com
location Philadelphia, PA
age 39
visits member for 1 year, 7 months
seen May 8 at 21:53

These days my main job is as IT Director for Weavers Way Co-op, a cooperative grocery store in Philadelphia. This job allows me to indulge my desire to mess with a lot of different things, including occasionally some coding and web developement in addition to managing servers, deploying laptops, and crawling around under cash registers. (It also lets me work for an organization focused on Sustainability, Fresh Healthy Food, and supporting the Local Economy, which makes me feel good!)

I also teach in the University of the Arts Continuing Education Web Design and Development certificate programs. I've taught various coding-oriented classes in this program-- HTML, CSS, Javascript, jQuery, and PHP.

I do some other stuff, too.

Other Areas of technology expertise/interest:

  • Coldfusion
  • SQL Server
  • IIS
  • Web development, in general
  • Point of sale systems and other technology for small chain grocery stores.
  • Linux (especially Ubuntu)
  • FreeBSD
  • qmail
  • Drupal
  • Raspberry PI and other small/cheap computers.

Management/Professional interests:

  • IT in mid-sized retail organizations (online, brick and mortar, grocery, mail order, multi-channel)
  • Managing developers
  • Cooperative enterprises

Personal Interests/Passions/Hobbies

  • Sustainable local communities
  • Cooperative enterprise
  • Board and card games, especially Dominion

Jan
17
comment List all MAC addresses and their associated IPs in my local network(LAN)
I just did a quick test on my network, and arp is displaying only about 25% of the devices that exist. If the computer running arp hasn't received a packet from another device, it won't be on the arp list. I'd be interested in knowing more about the devices that nmap failed to detect on your network; there are ways to hide from nmap but I've found the default nmap scan pretty effective. That said, There's no failsafe answer because if a device isn't generating traffic and isn't answering requests, it is invisible-- but most devices will answer some type of request.
Jan
17
awarded  Critic
Jan
17
comment List all MAC addresses and their associated IPs in my local network(LAN)
I'm surprised by this answer. "arp" does not show a list of active MAC addresses on the local network. "arp" shows a list of MAC addresses corresponding to machines that have interacted with the machine it is being run on. If there has been no communication between the local machine and another machine on the network recently, that machine will not show up in the "arp" listing.
Jan
17
awarded  Supporter
Sep
30
awarded  Nice Answer
Mar
3
awarded  Editor
Mar
3
revised What are the risks of NOT using a firewall (home computer)?
added 76 characters in body
Mar
3
comment What are the risks of NOT using a firewall (home computer)?
Bottom line, while what you've said in your answer is generally true, there are a number of different situations that can place a computer that usually lives behind NAT at risk, and a host-based firewall helps with most of them. (See my answer). There's no good reason I can think of NOT to enable it.
Mar
3
comment What are the risks of NOT using a firewall (home computer)?
...or the host based firewall would have an exception because you want to USE it on the LAN, which would cause this problem. Sure, the person in that blog post made a couple of mistakes. But the point is that UPnP is a rarely-used router feature that can be a security "gotcha." You think you are enabling something on your LAN, and suddenly you've exposed it to the internet.
Mar
3
comment What are the risks of NOT using a firewall (home computer)?
That said, your host-based firewall probably doesn't help you in this scenario.
Mar
3
comment What are the risks of NOT using a firewall (home computer)?
Here's an example of how it can happen by accident: miket5au.blogspot.com/2011/03/beware-vnc-and-upnp.html Sometimes you want to desktop sharing on the LAN, but don't mean to enable it for the outside world.
Mar
3
awarded  Teacher
Mar
3
comment What are the risks of NOT using a firewall (home computer)?
Even on Windows, NAT protects against more threats than most people realize. But I just don't see a good reason NOT to use a firewall.
Mar
3
awarded  Autobiographer
Mar
3
answered What are the risks of NOT using a firewall (home computer)?