Thank you for all your great info, we will be purchasing a cert that is on the client's list to make it easy for the client process. In turn this will help raise the security level.
It's a good thing that I posted to the forum. Thanks again, Ken -----Original Message----- From: Michael Griego [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 04, 2007 5:29 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.1x With A One-Way Certificate Yes, if you purchase a commercial cert from one of the CAs who's certs are included with the OS, all the user has to do is: a) pick your certificate's CA from the list in the PEAP setup b) enter your certificate's CommonName in the server list The user does not have to download anything. Doing both of these, though, is extremely important to gain the highest level of security and prevent the possibility of session hijacking. In our environment, we purchased a certificate from Verisign and used a bogus hostname of 8021x.utdallas.edu. In our instructions, we tell the users to check the "Secure Server CA" box *and* enter "8021x.utdallas.edu" into the server list field. The only thing the client has to obtain to get configured is the instructions. I'm not quite sure what your Cisco rep was talking about, --Mike On Apr 4, 2007, at 12:39 PM, ktaillon wrote: > One of the things that I didn't point out is we are running the new > LWAPP AP's and controller setup. After I told Cisco about the one-way > cert he said this is ok to run in this setup because the peap tunnel > that is created from the client to the AP and to the ACS/Controller > could not be interfered with. > Not like a web server cert that could be hijacked. > > If I were to install a Cert(Verisign, GTE.....)on the ACS that is on > the XP list of trusted names, can the client just check off that name > without having to go to a web server to download and install the cert? > > I'm just trying to keep the client setup as simple as possible but not > in a way that lowers security. > > Ken > > > -----Original Message----- > From: Michael Griego [mailto:[EMAIL PROTECTED] > Sent: Wednesday, April 04, 2007 11:27 AM > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > Subject: Re: [WIRELESS-LAN] 802.1x With A One-Way Certificate > > Just be aware that not validating the certificate opens you up to > fairly easy session hijacking attacks since anyone can come up with a > cert and get your clients to connect to their APs instead of yours > (since the client is not checking cert validity)... The attacker > would then have access to the data stream as it would appear on the > LAN, so you potentially lose a lot of the security benefit. > > --Mike > > > On Apr 4, 2007, at 10:19 AM, Rick Coloccia wrote: > >> Yes. We aren't using the wpa-tkip with acs, but we do use ias >> (windows) for radius, we have our clients uncheck the 'Validate >> Server Certificate' option and away they go. >> >> http://www.geneseo.edu/CMS/display.php?page=5200&dpt=cit >> http://www.geneseo.edu/CMS/display.php?page=5198&dpt=cit >> http://www.geneseo.edu/CMS/display.php?page=5199&dpt=cit >> >> We like how it works. We run 4 4404's with 350 1242ag access points. >> >> -Rick >> >> >> ktaillon wrote: >>> We are trying to implement a WPA/TKIP Wireless authentication. We >>> are using ACS Solution Engine which backs into AD for >>> Authentication. We are currectly using WEP. >>> We are looking for the least amount of client setup to make this >>> change. Cisco has told us to use the PEAP MSCHAPv2 connection with a >>> one-way cert, the cert or CA would only be installed on the ACS >>> server and the client would uncheck the 'Validate Server >>> Certificate' >>> under the protected EAP properties. They also told us that the PEAP >>> tunnel that is created would be comparable to having a cert on the >>> client. This seems to be working fine in our tests and is very >>> simple setup for the clients. >>> Are any of you running your connection setup this way? >>> Ken Taillon >>> Network Support Specialist >>> Information Technology Services >>> Wesleyan University >>> 860-685-5657 >>> ********** Participation and subscription information for this >>> EDUCAUSE Constituent Group discussion list can be found at http:// >>> www.educause.edu/groups/. >> >> -- >> Rick Coloccia, Jr. >> Network Manager >> State University of NY College at Geneseo >> 1 College Circle, 119 South Hall >> Geneseo, NY 14454 >> V: 585-245-5577 >> F: 585-245-5579 >> >> ********** >> Participation and subscription information for this EDUCAUSE >> Constituent Group discussion list can be found at http:// >> www.educause.edu/groups/. > > > ********** > Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/. > > ********** > Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http:// > www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
