As a network systems admin. \n-how may i check all open ports on my network.\n-how can check the traffic and users for those ports.\n-how may i know what is normal and what is not for a specific port.\n-how may i check or listen for a specific port.\n-what are the best admin tools for all this.\n\n=Thankyou. :)
205896
There is a program called portmon. It monitors your ports on a computer. It only works on windows nt and 9x.\nhttp://www.the3dstudio.com/\n\nAlso, to control what ports are opened you can use Shieldsup! It costs money though.\nhttp://www.grc.com
592678
I did a quick search on Trojan Hunter's website and a quick check in there forums came up with this. \nhttp://forum.misec.net/board/FAQ/1139255619\n\nHere is another link to port alerts in TH.\nhttp://uk.misec.net/trojanhunter/help/?page=PortAlerts
524774
Yes, there is. Install an application like nagios (freeware) or Look@Lan (freeware). Have that monitor the IP address of your router.\nBut it's usually not easy to understand all traffic that is going on in your network.
428956
start a direct video connection.. and see which ports are open to what IP addresses! (i've done it... but it is messy)
326060
It sounds as though somebody's getting a "free ride" on your network...  if the building is shared, or adjoins other buildings, you may find somebody tapped into the cabling or your router...\n\nFirst, go and look at the router itself..  how many connections?  If there's more ports in use than there should be, unhook them one at a time...  if there's one that you can unplug without any of your computers going offline...  start tracing that cable..\n\nFailing that, you'll need to go into the admin pages on your router...  the first thing to do is to change the router management password, so that your "guests" can't undo your changes.  Now take a look and see who's connected.\nIf there are IP numbers that don't match any of your computers, that's a clue...\n\nJust blocking out those IP's will give you a temporary diagnostic...  as above, if there's one that you can shut off without losing your own connections, there's your problem.\nLong-term, that's not a good solution...  you'll need to get the MAC address for each of your computers, and then set up "MAC filtering" on the router, so that only your machines are permitted access.\n\nOnce you've identified the "rogue" connection, you can either just leave it dangling, or cut the connector off and twist all the wires together ... think of the hours of fun they'll have trying to sort that out...
58532
control panel, performance/maintanence, system,hardware, if you run windows, for more options, check the help menu your port isn't "broken" just not enabeled. you have to turn it on
447588
do a tinternet search on\nbt home hub port forwarding ;)
33023
Can your new computer access any of the other network computers?\n\nIt could be something simple like a firewall making the laptop  unaccessable by other computers. Pull your network off the internet, but leave the network active. Drop all your protection, firewalls, antivirus, etc and check again.\n\nIf you are running higher-end antivirus they have something like "internet security" that will really mess with a LAN.\n\nIf you can see the laptop on the network, but can't access it - I would begin by looking into the laptop security and permissons.
201272
Try runnig ethereal.  It will show you the actual traffic and you can look at stuff by port.  There mays be clues in the content.
232665
IP and Port blocking is not really viable for what you are talking about. When a connection is made, the source machine randomly assigns a port, so it changes all the time. \n\nPort blocking is used only to stop a specific service connection. For instance blocking port 80 will stop web connections, but this blocks on DESTINATION port, not source port since the destination port will be the one that doesn't change.\n\nCheers :)
128094
You can download ip trace tools but all you will end up with is a yahoo ip...give me the mail addy and maybe I can help. Some of the rest of you below me aint got a clue....answer questions you know sumthin about! Mt and Lan are the only ones here that know sumthin...
356544
Use "netstat" command. Can show what ip's are conneceted, what ports are listening, etc.
664829
can you get to the internet when you log in?  Have you try a terminal service into the server? and see if that works.  You can imz me i am a system admin too.\n\nAlso try loggin in as your user too you should have created yourself as a admin too.  See if you can bring the desktop that way once again if you still can't let me know and I will try to help yo solve this problem
662822
you may want to go to http://scan.sygatetech.com/ where it will scan your comp and tell you how protected your comp is, you can try it with and without your 3rd pary firewall
369145
read here \n\nhttp://articles.networktechs.com/58-p1.php\n\ngood luck
9793
I'm not sure about websites, but this book is AWESOME:\n\n"Practical TCP/IP: Designing, Using, and Troubleshooting TCP/IP Networks on Linux and Windows"\n\nI highly recommend it for the absolute beginner and networking-veterans. It describes *everything* in great detail, including troubleshooting tips and tools. It has screenshots and sample outputs for both Unix and Windows network tools and tons of insights from the author who's job was to troubleshoot and fix simple and complex networks.\n\nThe best part is, he teaches by example. You set up little networks and slowly grow their features and nodes.
213998
Check the docs for the game.  It will tell you the ports that it uses.  Go into your firewall configuration and open those ports.  You should also set the firewall to forward those ports only to your machine.  Check the firewall docs for instructions on doing this.\n\nDo NOT disable the firewall entirely.\n\nAlso, many firewalls support UPNP.  With UPNP aware apps and firewalls, the app manages the ports on the firewall for you.  When properly designed this is a good thing but if poorly designed it can be catastrophic.  Most modern firewalls support UPNP but have it disabled by default.  Enable it while you're playing and disable it when you're done.