On Fri, 18 Jan 2008 09:07:40 +0100, Jan van Wijk wrote:
>Hello Hakan,
>
>On Thu, 17 Jan 2008 23:04:49 -0500 (EST), Hakan wrote:
>
>>I have a Win application I run in VPC under Win 2000. This application
>>communicates with my TiVo DVR and I'd like to see if I can write a
>>small application under OS/2 to transfer files back and forth between
>>the computer and the TiVo.
>
>OK, sounds like a nice reverse-engineering project :-)
>
>>Can I use the OS/2 program -- is it tracert? -- to log network activity
>>that originates from an application running in VPC?
>
>No, tracert is 'trace route' and is a little tool to see how TCP/IP
>packages are being sent to a specific URL. It displayes all
>the intermediate nodes visited while underway ...
>
>To really trace TCP/IP traffic contents you need a sniffer
>program that can do that. There are quite a few for Windows
>and Linux, but I am not sure there is something for OS/2.
>
>These programs have device-drivers that hook to the
>network card and can filter out and interpret TCP/IP
>(or other protocols) packets from there.
>
>There are also dedicated LAN-sniffer machines that
>can be attached to a router or switch that can monitor
>or trace the traffic on a whole LAN ...
I *think* it depends on VPC using virtual switch or not. In the former
case a sniff on the host will *not* see any packets, I know 'cos I
tried it, but the fake NAT the other mode uses ought to show up.
Also bear in mind that if you use say a *nix box on the network to
sniff then you need a hub and not a switch. Otherwise the sniffer won't
see anything. There are methods around to sniff switches but it is a
lot of faffing about. I keep a hub on my network and if I need to sniff
a box I move it's ethernet cable and the *nix box's one to the hub.
Tillbaks till lista