My bare knuckles networking understanding led me to believe that if I set an IP address of, for example, 10.0.2.25 with netmask 255.255.0.0 on a machine, it should see all hosts in the subnet 10.0.1.0/24 (and many others on the whole 10.0.0.0/16 subnet) I just tried it, but the machine with 10.0.2.25/16 didn’t see at all 10.0.1.0/24 addresses. Two questions: How to set up such a network simply? What’s the mistake in my understanding? Asked [...]

If I have a LAN and and connect it with a switch, I understand it uses a CAM table to route packets in layer 2 (by saving mac to port relations). So far all good. However, when using a router for a LAN (ONLY for a LAN, not to connect it to “the outside” WAN/internet/etc) I get a bit confused as to how it internally processes packets. I would first split this into two router [...]

My client machine/(s) is/(are) Windows XP SP2. I can’t effort every time to have physical access to my server machine. To analyze the real time traffic and bandwidth between client and server machine, which tool would be best? Asked by Ravi Joshi XP’s built-in performance monitor (Control Panel/Administrative Tools/Performance; Start, Run “perfmon”) will be your friend here, once you’ve done some configuring on it. To wit: Remove all of the default counters by clicking them [...]

i am hosting my own website on my local machine. i setup a virtual server on my router and everything works like a charm. in IIS, i cannot bind the WAN ip (it dosent show up) and if i type it manually, then the website is not working. now i know that there is something else i need to do (Bind the WAN IP to my local machine as the title says), but how would [...]

I just bought a Linksys SE1500 Ethernet switch and I’m trying to set up a small standalone network for pentesting and security research. However, when I do a network scan with one of the computers using the eth0 interface, nothing happens. DHCP is enabled on all the machines. This may seem trivial but….. should I turn off DHCP and manually assign IP addresses, or should the switch be assigning IP addresses (even though its not)? [...]

if I’m accessing a local file via UNC path, for example //hostname/abc.txt, Will the traffic still go through the switch or it’s clever enough to figure out this is a local machine, i.e. will there be a significant speed impact if I’m accessing a file via a UNC path rather than its local path (d:\abc.txt, for example) Thanks. Asked by Magicpork File sharing is based on ordinary TCP/IP, so the rules are no different than [...]

I am trying to configure a Cisco ASA 5510 to assign specific IP-addresses to specific MACs. Firmware on my ASA is 8.2(5). I have used this feature in our previous device (Cisco SA-520W). I have also read that this feature is (not yet) implemented. How do I work around this problem, if not by direct assignment? Do I need to specify fixed IP’s on concerned devices themselves? I also have a SG 300-52 switch for [...]

I got two Debian 6 servers – one for web and one for the database.. How can I connect through the local area network? On both servers I have permanently changed the hostnames /etc/hostname /etc/hostsweb => web-server db => db-server In the privileges in mysql I have set the root user to accept requests from web-server (instead of localhost) and from the web-server I connect to db-server in my.cnf I have escaped the following line: [...]

I am a complete n00b to configuring Jabber/XMPP servers and I am hoping to get some help getting set up. I have done all of this and installed pidgin. I seem to be able set up my “admin-user” in pidgin no problem but when I try to register a new user I get a 403 Fobidden message back from pidgin. Do I need to change the ejabberd.cfg file to allow users to register? If so [...]

I asked this on another site recently, but I figured this might be a good place to ask this as well: Please take a look at the diagram below. My question is in regards to computer “C” in the middle of the diagram. It has three NIC cards. It needs to be able to talk to computers A1, A2, A3, B1, B2, and B3. To do that, I will need to put static routes into [...]