Wireshark Remote WinPcap Capture

what is winpcap
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welcome to the strike cast variety training is free for everyone my name is Andrew kraut Hamill and today were going to talk about Wireshark and remote packet capture so more specifically were going to talk about pcap winpcap lippy cap and how to access packets remotely from a device without installing Wireshark or some other software besides the libraries and capturing it to a different device across network so its something you can do that a lot of people dont know about is this feature of remote capture so its not necessarily the most advisable method of doing it usually you want to do a local capture on a device or put a sniffer into a network somewhere along your infrastructure capturing locally and then re transmitting it out the network card to a difference computer isnt really you know the best way of doing it but if youre in a bind and you know the computer that youre needing to capture on has a really small hard drive and you want to run the capture for a couple days or something like that you might have to do this and you know this is like a poor mans like a poor mans shark appliance or some other packet capture appliance so what youll do is install Wireshark on some sort of large storage computer or server file server or something like that whatever it is you want to do and then were going to install windy cap or lippy cap on the computers that you want to capture from so Im going to be focusing on windows in this video so were going to talk about wind peak app and you actually have to only install wind peak app on the computers that you want to capture from you dont need Wireshark in the whole package just winpcap and then that comes with a service that we end up configuring and starting and then well go into Wireshark and point it to the IP of the computer that were trying to capture from and the credentials we end up adding so the first thing youre going to need is WinPcap go to WinPcap org and go download and install wind pcap pretty easy install obviously one

of the standard download next next finish type deals right now the latest version is 4.1.2 as of november 5th 2012 so go grab that and install it were not going to go through the whole install here but its where you go and get it and after that is installed were going to go and open up actually were going to go right click on your computer and go to manage were going to go this Vegas its more Universal you can do control user passwords too as you might have saw there and the the start the little run dialog but um if you go this way it works on both domain and non domain computers so Im on my local computer here I went to right clicked on my computer manage go to local users and groups were go to users and were going to make a peek app user so the local user were going to give administrator privileges to to the local PC here and then enter those credentials in the other computer that were going to capture to whatever has a Wireshark installed on so that it can talk to this instance of this service that gets installed from WinPcap so were going to name it something simple decap and we can name it whatever you want for your password its going to be a temporary administrator account were creating so its up to you how crazy you want your password out see just deleting this account after youre done using it and as you can see on making some selections here at the bottom we dont want this is going to be a service account so we dont want the password to change and we dont want to expire for the whatever time frame it is that were going to run this for there we go we created our pcap user there is were going to open them up and were going to add them to the administrators group there we go on the local PC so again if youre on a domain computer this is the way to go about it for making a local account if youre on any standard normal PC you can do it this way this

is the way I suggest just to that way this account doesnt have its password expire if you go through the other method its under whatever local policies you have set up for your users so there we go we made our account now were going to go to start run services.msc Im going to bring up our service list and windows here and look expand these two columns a little bit scroll on down to remote look for remote packet capture protocol says its v-0 experimental and all this stuff make it sound scary this has been out for a while now Ive had no problems with it dont worry about it saying its compare mental in version zero its pretty nice Im going to open that up go to log on and were going to change the service to use the pcap account that we just created go ahead and click OK it should say log on services are right ok good and then were just going to start service once the service starts just refresh a little bit make sure it didnt crash on us and die so now its up and running and looking good so this is what you would do on whatever computers computer or computers that you want to capture from these are your the ones that are going bad and you need to sniff some packets so now thats up and running so I have this running on another computer here so we can connect to it and see some real traffic but and I just went through the install on this PC that actually has Wireshark installed so that at least you can see how its set up so now were going to open up Wireshark and Im pretending Im on the computer thats the capture point its got Wireshark installed Im going to capture you know five days worth of traffic from this other computer and I have a big hard drive here so Im going to capture at all so were going to open up Wireshark latest version right now is one point eight point three as of today so make sure you go out get the latest version the interface windows and stuff have changed around

since 1.6 and before so if youre following along with an old version youre not going to have the same windows that I do so please go do that you have a lot nice lot of nice new features theres WinPcap RP cap ng format multiple interface capturing its its really neat go get go get the one pointing series going to go to our interfaces options and then were going to go to manage interfaces and then remote interfaces kind of a roundabout way to get there but go ahead and click Add and its going to ask for the host and port of the PC that were trying to capture from so this is the PCI of the laptop here I have set up its going to be 192 168 77 153 your port is always 2002 unless you go ahead and change it for some reason a lot of times this shows up is empty and you might not know what port it is so for your purposes right downloaded port 2002 and then were going to use password authentication not null password authentication and were going to enter in the account and credentials that we just created that was the local that local admin account so were going to his pcap and then his password once you go ahead and click OK you should see some interfaces pop up these are the interfaces that are found on that remote system if you have a problem and it cant connect at this point it will fail you wont even see this if you see this right now and you get interfaces showing up then youre connected and things should be good from here on out if you dont go turn off the firewall on the computer that youre trying to capture from I cant have the firewall and on its not going to work unless you open up the port on the firewall those of you in a domain environment you might have the firewall turned off already if youre on a local normal home PC or something probably the firewall is on by default go and turn it off for now for this purpose or open up the port slash application thats how up

you want to do it but thats going to end up be a problem so once we see these interfaces thats good were going to apply and close and then if we scroll down in our interface list here now not only do we have our local interfaces but we have some remote ones and then Im going to select the appropriate remote interface on this other laptop here Ive got like a local Ethernet connection and then some other every interface I forget what that one is and then my wireless interface here which is this guy so were going to check off the interface that I want to select on this remote system if youre using the one point eight make sure pcap ng selected nice format allows you to do some neat things with multiple interfaces and commenting inside of inside of the capture files is really neat and then you can obviously change your options here as to whether or not you want to do this if youre going to be capturing for a long period of time and you dont want to waste resources on the frivolous things like having the PAC the page refresh constantly with the new packets you can just turn this off your capture will still work you just wont see anything on the screen so if youre going to use this as your capture point for like five days and your capturing off a database server thats being accessed by thousands of people you probably dont want these top two options on because its going to waste resources on your wifes Wireshark box to turn those off for our example here Im going to leave them on though Im going to go ahead and click start there we go were capturing packets from this laptop that I have running with the remote packet capture service running and were remotely retrieving all his information thats all there is to it I hope you enjoyed this video if you have any questions or comments please leave them in the comment section below I try to get back to everybody and stay tuned for more videos on other interesting IT topics thank you for viewing and well see you next time you

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