I've actually gotten an 802.1x eap client to auth against LDAP. It's not fun.
You CANT use normal PEAP on the MSFT client because the credentials are passed via MSCHAPv2 in the PEAP tunnel. LDAP cant read MSCHAPv2. The Funk/juniper odyssey client has a way of doing PEAP-GTC (generic Token Card). Basically, the credentials are not encrypted inside the tunnel. This is for using secureID tokens and such. You can take advantage of GTC's unencrypted user/password to then proxy the credentials over to an LDAP server. Of course, EAP requires some sort or RADIUS server to terminate the 802.1x EAP-PEAP outer tunnel and then it must be able to query an LDAP server with the clear text stuff. Some wireless vendors integrate this "RADIUS offload" or terminate the PEAP tunnel and then directly query LDAP. This eliminates the need for an "external" RADIUS server. -Emerson -----Original Message----- From: Mark Linton [mailto:[EMAIL PROTECTED] Sent: Tue 7/11/2006 8:29 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.1x authentication using LDAP > >From what I can tell, the only way to deal with plaintext passwords > stored > in LDAP and still have username/password authentication is to go with > EAP-TTLS and use the secure2 client. > > But I just saw the post by Tom Zeller and he's saying the hashed password > does NOT go over the network with MS-CHAP. So I'm starting to get a bit > confused. Some background might help clarify here. The phrase "EAP-TTLS," while being the correct name for the EAP type, does not fully qualify the implementation. TTLS is "Tunneled TLS." TLS being "Transport Layer Security," which by itself creates a tunnel. So we have two tunnels here. The one created by TLS -- sometimes called the "outer" tunnel -- and the unspecified "inner" tunnel. In the case of Tom Zeller's message, earlier, the inner tunnel was formed by MS-CHAPv2. Some people write this as EAP-TTLS-MSCHAPv2. The "clear-text password" version of EAP-TTLS uses the "Password Authentication Protocol" (PAP) to form the inner tunnel. Some people write this as EAP-TTLS-PAP. So, Tom was correct in the context of Tom's discussion, and the people talking about username/password authentication were also correct. They were simply assuming different implementations of EAP-TTLS. Both are perfectly valid and each has their pros and cons. Sincerely, Mark Linton [EMAIL PROTECTED] www.personal.psu.edu/mhl100 814-865-4698 > -----Original Message----- > From: Matt Ashfield [mailto:[EMAIL PROTECTED] > Sent: Monday, July 10, 2006 1:53 PM > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > Subject: Re: [WIRELESS-LAN] 802.1x authentication using LDAP > > Hi All, > > Thanks for all the responses. It's great to be part of a useful mailing > list > like this! > > Just to clarify a few things: > our passwords are stored in cleartext on the ldap server. > We are using SunOne for LDAP and FreeRadius for radius. > We have no desire to have individual client certificates and would prefer > to > do username/password against the LDAP server. > > >From what I can tell, the only way to deal with plaintext passwords > stored > in LDAP and still have username/password authentication is to go with > EAP-TTLS and use the secure2 client. > > But I just saw the post by Tom Zeller and he's saying the hashed password > does NOT go over the network with MS-CHAP. So I'm starting to get a bit > confused. > > Any thoughts? Does anyone here have this same situation and have it > working? > > Thanks > > Matt Ashfield > [EMAIL PROTECTED] > > > -----Original Message----- > From: Michael Griego [mailto:[EMAIL PROTECTED] > Sent: July 7, 2006 4:24 PM > To: [EMAIL PROTECTED] > Cc: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > Subject: Re: [WIRELESS-LAN] 802.1x authentication using LDAP > > Hey, Matt, > > This setup is actually almost identical to what we're doing here at > UT Dallas. > > As is commonly seen on the FreeRADIUS mailing lists, I think you may > be confusing how to use PEAP with LDAP a little. In order to use > PEAP with LDAP, you don't use LDAP "authentication" in FreeRADIUS. > You have to store either a cleartext password or an NTLMv2 password > hash in your LDAP directory for each of your users. Be sure if you > do this to set appropriate ACLs on the attribute containing the > password/hash so that only the RADIUS connect profile can get to that > attribute. In any case, once you've done this, the LDAP module goes > in your authorize section in FR so that it can pull the password or > hash out and use it to perform the authentication itself using the > mschap module. > > Also, for PEAP, you only need a certificate for your RADIUS servers > to authenticate the network to the users. Your users don't need > personal certificates as they would using EAP-TLS. If you purchase a > commercial certificate from one of the CAs included by default in > your client OSes, then you don't have to install anything on the > clients and just have to configure them for access. > > These links might be useful for you: > > UTD's 802.1x setup instructions for Windows XP: > http://www.utdallas.edu/ir/cats/network/wlan/8021x/winxp/index.html > > I actually gave an Educause Live presentation on UTD's 802.1x > deployment. Its archived here: > http://www.educause.edu/LIVE058 > > Hope that helps! > > --Mike > > On Jul 7, 2006, at 1:50 PM, Matt Ashfield wrote: > > > Hi All > > > > I'm trying to configure 802.1x wireless authentication using > > credentials > > stored in LDAP. > > > > I am running FreeRadius and SunOne ldap server. The Radius server is > > correctly doing authentication attempts to the LDAP server (I issue > > the > > "radtest" command with a username/passwd from LDAP and I get an > > authenticate-accept back). > > > > The next step is setting up an XP client to talk to an Access > > Point, which > > is configured to authenticate via the Raidus server, via LDAP. So > > far, in my > > minimal testing, I've seen the client try to connect using it's > > Windows > > credentials rather than giving the user a chance to enter a > > username/password. > > > > I'm sure others out there are doing this. I'm just wondering what > > you're > > using? EAP-TLS, PEAP, etc..? I guess I need to get my acronyms > > straight > > first and go from there. > > > > From what I can tell PEAP will require my users to install a > > certificate. > > We'd much rather prefer them to have to enter their LDAP usernames and > > passwords. > > > > Any advice is appreciated. > > > > Thanks > > > > > > Matt Ashfield > > [EMAIL PROTECTED] > > > > ********** > > 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/.
