TLS / SSL negotiation fails when behind Cisco IP phone
Danner, Mearl
jmdanner at samford.edu
Sun Sep 9 19:19:13 CEST 2012
Good info if we start doing wired 802.1x
Thanks
-----Original Message-----
From: freeradius-users-bounces+jmdanner=samford.edu at lists.freeradius.org [mailto:freeradius-users-bounces+jmdanner=samford.edu at lists.freeradius.org] On Behalf Of Dan Lundström
Sent: Sunday, September 09, 2012 12:11 PM
To: FreeRadius users mailing list
Subject: RE: TLS / SSL negotiation fails when behind Cisco IP phone
The problem was firmware, I works as expected with both older and newer versions. So basically don't use firmware version 8.5(2).
Also might be good to know that all of the following phones use the same code base;
IP Phones - 7906, 7911, 7931, 7941, 7942, 7945, 7961, 7962, 7965, 7970, 7971 & 7975
//Dan
> -----Original Message-----
> From: freeradius-users-
> bounces+dan.lundstrom=axis.com at lists.freeradius.org [mailto:freeradius-
> users-bounces+dan.lundstrom=axis.com at lists.freeradius.org] On Behalf Of
> Dan Lundström
> Sent: den 9 september 2012 17:53
> To: FreeRadius users mailing list
> Subject: RE: TLS / SSL negotiation fails when behind Cisco IP phone
>
> I have been looking at possible changes to make on the phone and call
> manager, but cannot find anything that would relate to the behavior we have.
> Is there a way to change MTU value on the phones, I can't find it.
>
> We have the 7945 model on another site as well and there everything works,
> I have tried with a 7942 here as well and it does not work. I am quite sure that
> the problem is related to the internal switch in the phone, but since the EAP
> package gets through to the authenticating switch there should be a way to
> get it to work. I don't have any other phone models here to test with, and I
> can't find any information about hardware/switch differences in the 7962 and
> the 7954 phones.
>
> Can anyone tell from the below sessions if the SSL negotiation fails because
> of fragmentation?
>
> I just found this article;
>
> https://supportforums.cisco.com/thread/163050
>
> Seems like it might be a firmware issue, I will upgrade/downgrade and let
> you know the outcome.
>
> /Dan
>
> > -----Original Message-----
> > From: freeradius-users-
> > bounces+dan.lundstrom=axis.com at lists.freeradius.org
> > bounces+[mailto:freeradius-
> > users-bounces+dan.lundstrom=axis.com at lists.freeradius.org] On Behalf
> > users-bounces+Of
> > Danner, Mearl
> > Sent: den 9 september 2012 16:37
> > To: FreeRadius users mailing list
> > Subject: RE: TLS / SSL negotiation fails when behind Cisco IP phone
> >
> > There is a switch in the Cisco phone. All my experience is with a 7945.
> >
> > There are some ethernet settings in the phone settings - under device
> > configuration. They can be controlled locally and some are controlled
> > in Cisco Call Manager.
> >
> > Might look there as a start.
> >
> > -----Original Message-----
> > From: freeradius-users-
> > bounces+jmdanner=samford.edu at lists.freeradius.org [mailto:freeradius-
> > users-bounces+jmdanner=samford.edu at lists.freeradius.org] On Behalf Of
> > Dan Lundström
> > Sent: Sunday, September 09, 2012 9:02 AM
> > To: freeradius-users at lists.freeradius.org
> > Subject: TLS / SSL negotiation fails when behind Cisco IP phone
> >
> > Hi!
> >
> > We are using EAP/TLS for wired authentication on our networks, in one
> > of our sites the SSL negotiation fails when the client is connected
> > behind a Cisco
> > 7962 IP phone. We have this same setup working on other sites.
> > The phone model varies between the sites, but I cannot find any
> > information about incompatibilities for the particular phone model
> > saying it should be the phone that is causing the problem.
> >
> > I figured that the problem was caused by fragmentation but after
> > adjusting the fragment_size parameter in eap.conf, according to the
> > comments..;
> >
> > # This can never exceed the size of a RADIUS
> > # packet (4096 bytes), and is preferably half
> > # that, to accomodate other attributes in
> > # RADIUS packet. On most APs the MAX packet
> > # length is configured between 1500 - 1600
> > # In these cases, fragment size should be
> > # 1024 or less.
> >
> > ..without any result, i am not sure anymore.
> >
> > When I connect the client directly to a switch port, without the IP
> > phone in- between, everything works perfect.
> >
> > Here comes the relevant part of RADIUS debug output, first session -
> > Without IP phone, directly connected to the switch [ client -> switch
> > ];
> >
> > ----------------------------------------------------------------------
> > --------
> > Found Auth-Type = EAP
> > # Executing group from file /etc/freeradius/sites-enabled/default
> > +- entering group authenticate {...}
> > [eap] Request found, released from the list [eap] EAP/tls [eap]
> > processing type tls [tls] Authenticate [tls] processing EAP-TLS [tls]
> > eaptls_verify returned
> > 7 [tls] Done initial handshake [tls] <<< TLS 1.0 Handshake [length
> > 0b2e], Certificate [tls] chain-depth=2, [tls] error=0 [tls] -->
> > User-Name = host/US- LAPJAMIESON.us.xxxx.yyy [tls] --> BUF-Name =
> Xxxx
> > Root CA [tls] --> subject = /C=SE/O=Xxxx Communications
> > AB/OU=IT-group/CN=Xxxx Root CA [tls] --> issuer = /C=SE/O=Xxxx
> > Communications AB/OU=IT- group/CN=Xxxx Root CA [tls] --> verify
> > return:1 [tls] chain-depth=1, [tls]
> > error=0 [tls] --> User-Name = host/US-LAPJAMIESON.us.xxxx.yyy [tls]
> > --> BUF-Name = Xxxx Sub CA [tls] --> subject =
> /DC=com/DC=xxxx/CN=Xxxx
> > Sub CA [tls] --> issuer = /C=SE/O=Xxxx Communications AB/OU=IT-
> > group/CN=Xxxx Root CA [tls] --> verify return:1 [tls] chain-depth=0,
> > [tls]
> > error=0 [tls] --> User-Name = host/US-LAPJAMIESON.us.xxxx.yyy [tls]
> > --> BUF-Name = US-LAPJAMIESON.us.xxxx.yyy [tls] --> subject = /CN=US-
> > LAPJAMIESON.us.xxxx.yyy [tls] --> issuer = /DC=com/DC=xxxx/CN=Xxxx
> > Sub CA [tls] --> verify return:1
> > [tls] TLS_accept: SSLv3 read client certificate A
> > [tls] <<< TLS 1.0 Handshake [length 0086], ClientKeyExchange
> > [tls] TLS_accept: SSLv3 read client key exchange A
> > [tls] <<< TLS 1.0 Handshake [length 0106], CertificateVerify
> > [tls] TLS_accept: SSLv3 read certificate verify A
> > [tls] <<< TLS 1.0 ChangeCipherSpec [length 0001] [tls] <<< TLS 1.0
> > Handshake [length 0010], Finished
> > [tls] TLS_accept: SSLv3 read finished A
> > [tls] >>> TLS 1.0 ChangeCipherSpec [length 0001]
> > [tls] TLS_accept: SSLv3 write change cipher spec A
> > [tls] >>> TLS 1.0 Handshake [length 0010], Finished
> > [tls] TLS_accept: SSLv3 write finished A
> > [tls] TLS_accept: SSLv3 flush data
> > [tls] (other): SSL negotiation finished successfully
> > SSL Connection Established
> > ----------------------------------------------------------------------
> > --------
> > ----------------------------------------------------------------------
> > --------
> >
> > Second part - With IP phone in-between [ client -> ipphone -> switch
> > ];
> >
> > ----------------------------------------------------------------------
> > --------
> > Found Auth-Type = EAP
> > # Executing group from file /etc/freeradius/sites-enabled/default
> > +- entering group authenticate {...}
> > [eap] Request found, released from the list [eap] EAP/tls [eap]
> > processing type tls [tls] Authenticate [tls] processing EAP-TLS [tls]
> > eaptls_verify returned
> > 7 [tls] Done initial handshake [tls] <<< TLS 1.0 Handshake [length
> > 0b2e], Certificate [tls] chain-depth=2, [tls] error=0 [tls] -->
> > User-Name = host/US- LAPJAMIESON.us.xxxx.yyy [tls] --> BUF-Name =
> Xxxx
> > Root CA [tls] --> subject = /C=SE/O=Xxxx Communications
> > AB/OU=IT-group/CN=Xxxx Root CA [tls] --> issuer = /C=SE/O=Xxxx
> > Communications AB/OU=IT- group/CN=Xxxx Root CA [tls] --> verify
> > return:1 [tls] chain-depth=1, [tls]
> > error=0 [tls] --> User-Name = host/US-LAPJAMIESON.us.xxxx.yyy [tls]
> > --> BUF-Name = Xxxx Sub CA [tls] --> subject =
> /DC=com/DC=xxxx/CN=Xxxx
> > Sub CA [tls] --> issuer = /C=SE/O=Xxxx Communications AB/OU=IT-
> > group/CN=Xxxx Root CA [tls] --> verify return:1 --> verify
> > error:num=7:certificate signature failure [tls] >>> TLS 1.0 Alert
> > [length 0002], fatal decrypt_error TLS Alert write:fatal:decrypt error
> > TLS_accept: error in SSLv3 read client certificate B
> > rlm_eap: SSL error error:0407006A:rsa
> > routines:RSA_padding_check_PKCS1_type_1:block type is not 01
> > SSL: SSL_read failed inside of TLS (-1), TLS session fails.
> > TLS receive handshake failed during operation [tls] eaptls_process
> > returned 4 [eap] Handler failed in EAP/tls [eap] Failed in EAP select
> > ++[eap] returns invalid
> > Failed to authenticate the user.
> > Using Post-Auth-Type Reject
> > # Executing group from file /etc/freeradius/sites-enabled/default
> > +- entering group REJECT {...}
> > [attr_filter.access_reject] expand: %{User-Name} ->
> > host/US-LAPJAMIESON.us.xxxx.yyy
> > attr_filter: Matched entry DEFAULT at line 11
> > ++[attr_filter.access_reject] returns updated
> > Delaying reject of request 11 for 1 seconds Going to the next request
> > Waking up in 0.9 seconds.
> > Sending delayed reject for request 11
> > Sending Access-Reject of id 50 to 192.168.207.202 port 1812
> > EAP-Message =
> > 0x040c0004 Message-Authenticator =
> 0x00000000000000000000000000000000
> > ----------------------------------------------------------------------
> > --------
> > ----------------------------------------------------------------------
> > --------
> >
> > I am stuck, any suggestions would be much appreciated.
> >
> > Brgds,
> > //Dan
> >
> > -
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