How to detect unkrown packet spreading computer of LAN?
960872
install a proxy server
271704
There are potentially several.\n\nEthernet:\n\n1. The source MAC address will change to that of the router.\n2. VLAN membership in the Ethernet header might be modified.\n\nIP:\n\n1. If the router is running NAPT, the source IP address and source port will be modified.\n2. Potentially any source IP addresses embedded in the payload might be modified depending on NAPT+ALG presence.\n2. The TTL might be decremented.\n3. The ToS bits might be modified depending on packet classification and priority assignment.\n4. Based on other changes the header checksum might be modified.
505267
packets are data sent or received by your computer
845114
If you have the machine they are downloading from then you can just do a netstat to see where the connections are coming from.\n\nIf you do not know where they are downloading from then you will need to get a program like ethereal (packet analyzer) and set it up on a port on your switch that sees all local traffic.  It will record all of the traffic and provide analysis to show where the traffic is coming from.
387740
go here and download Spybot\n\nwww.safer-networking.org
480652
you can use http://www.blockstatus.com/ip-proxy-detector to find whether you are behind a proxy or not. Good Luck!\n\nInternet Proxy servers are used for anonymity. That is, to hide your real ip. Surely your ISP will be counting your bandwidth usage, because you connect to these proxies using your internet connection.
56065
The netstat command can often reveal the state location of anybody that is sharing a P2P connection with you, for example from a simple Yahoo IM or file transfer. Then again, they could be running through a proxy/port redirector, in which case you'd only be getting the proxy's IP.\n\nApart from that, no detailed information can be extracted, without law breaking activities and extensive knowledge.
451681
just go to command prompt and give following command\ntracert <ip address here>\nso it will show whole path that how ur packet reaches to particular place.\nif u want to know only location then just check out this site that i have mentioned in source.
65946
1- Download and instal SoftPerfect Network Scanner (freeware) from here:\nhttp://www.softperfect.com/products/networkscanner/\n\n2- From "Options" menu choose "Auto detecte Locale IP Range" and choose your network card (Don't choose the one that have 127.0.0.1 IP address) \n\n3- Finally click on "start scanning" button on the main interface. The rogram will then list all the IPs on the Lan and thier hostname.
97605
netstat -a\nthis will show your pc's connections, so it will show the ip of yahoos msgr server but not your friends that are also connected to msngr.
1156568
Arp is a very usefull tool you can use it to troubleshoot connectivity issues.  your computer must have the MAC address of the target computer when sending out a packet\n\n\n\ncheck out this site to verify your public IP address:  mysourceip.com
132605
it depends on which distro you're using, if any. most modern distros will have a plethora of network monitoring tools available in your standard gnome or kde menu. look into the progs included with your distro and read up on the documentation.
140209
NetBus may be a cause of that, a hacker can install to monitor your activites. check your computer using a good antivirus.
1109871
You must install the Bandwidth meter. You could also try a network traffic analyser instead.
781821
You can use Ethereal to capture the packets from just before the game starts up to a bit into the game.  Then look at the capture.  It'll tell you what is running on what port, the protocols, etc.
80929
Try "packetstormsecurity.org"
704784
You could log onto the routers maintanence page and see wh ois connected to it, and see fi it has a logging function you can use to see who logged on previously.\n\nThe best way to stop other people to use it is to change the "SSID" name to one only you know, connect up your laptop and the turn "SSID Broadcast" to "off" so nobody can see yoru signal unless they know what it is called.\n\nUsing security like WEP etc. will also help stop unwanted people