Shashwat, Any Prism2 card will do - I just bought a couple of el-cheapo Prism2 "SpeedStream" cards from tigerdirect.com for $10/each. Alternatively, google for "enGenius" - they make 100mW Prism2 cards with MMCX antenna connectors.
-Joshua Wright Senior Network and Security Architect Johnson & Wales University [EMAIL PROTECTED] http://home.jwu.edu/jwright/ pgpkey: http://home.jwu.edu/jwright/pgpkey.htm fingerprint: FDA5 12FC F391 3740 E0AE BDB6 8FE2 FC0A D44B 4A73 > -----Original Message----- > From: Shashwat Srivastav [mailto:[EMAIL PROTECTED] > Sent: Wednesday, July 23, 2003 12:53 PM > To: Joshua Wright > Cc: [EMAIL PROTECTED] > Subject: Re: [Ethereal-users] 802.11 acknowledgement missing > > > Hi Joshua, > > Thanks for your help. Saneo cards dont seem to be readily available. > Can you suggest names of few other cards which are known to do this > task ? > > Regards, > Shashwat > > On Monday, Jul 21, 2003, at 13:38 America/Chicago, Joshua > Wright wrote: > > > Shashwat, > > > >> According to IEEE 802.11, every unicasted packet is acknowledged. I > >> captured a TCP data transfer session with ethereal, but > saw no 802.11 > >> Frame Control acknowledgement packets during this time. A desktop > >> machine, connected to Cisco Aironet 350 Access Point sent > TCP data to > >> laptop with Cisco 350 wireless card. The card was in > monitor mode. No > >> capture filter was used. No packet showed up when I used > >> display filter > >> " wlan.fc.type == 1 and wlan.fc.subtype == 13 " for seeing > packets of > >> 802.11 acknowledgement type. I can see other type of 802.11 packets > >> like beacon frame. > > > > The Cisco drivers don't properly put the Cisco Aironet cards into > > RFMON mode. The drivers will not report control frames to > libpcap, so > > you will never see them in a capture. > > > > If you are serious about capturing 802.11 frames, use a Prism2 card > > with the wlan-ng drivers (like the Saneo or enGenius 100mW/200mW > > cards). As a fallback, try using an Agere card with > patched drivers > > (airsnort.shmoo.com/orinoco.htm) - this combination will report > > control frames as well as all other 802.11 management/data frames. > > > > -Joshua Wright > > Senior Network and Security Architect > > Johnson & Wales University > > [EMAIL PROTECTED] > > http://home.jwu.edu/jwright/ > > > > pgpkey: http://home.jwu.edu/jwright/pgpkey.htm > > fingerprint: FDA5 12FC F391 3740 E0AE BDB6 8FE2 FC0A D44B 4A73 > > > >
