Unable to Connect to Open Network
Cy Schubert
Cy.Schubert at cschubert.com
Tue Jun 21 14:50:26 PDT 2022
My testing has exposed a buggy router. In other words I was not able to
reproduce the user's connection issue.
But the original problem remains. This and other users cannot connect to
various open unprotected university or hotel networks.
--
Cheers,
Cy Schubert <Cy.Schubert at cschubert.com>
FreeBSD UNIX: <cy at FreeBSD.org> Web: http://www.FreeBSD.org
NTP: <cy at nwtime.org> Web: https://nwtime.org
e**(i*pi)+1=0
Cy Schubert writes:
> So the plot thickens.
>
> Golden_Pond, is an open guest network I created on my DMZ AP. Removing the
> guest SSID and opening up the DMZ AP entirely resolves the problem. So,
> what does this mean?
>
> An open network will not have an IE. However an AP which has a primary WPA
> SSID and a secondary (like a guest SSID) which is open will broadcast a WPA
> IE. And, wpa_suppliant uses that to communicate its WPA IE. wpa_supplicant
> takes that to mean it's WPA protected.
>
> So the question is, what in wpa_supplicant changed tfor an open network
> with key_mgmt=NONE for it to override key_mgmt?
>
>
> --
> Cheers,
> Cy Schubert <Cy.Schubert at cschubert.com>
> FreeBSD UNIX: <cy at FreeBSD.org> Web: http://www.FreeBSD.org
> NTP: <cy at nwtime.org> Web: https://nwtime.org
>
> e**(i*pi)+1=0
>
>
> Cy Schubert writes:
> > While under hostap-2.9 I can connect to the AP.
> >
> > wpa_driver_bsd_associate: ssid 'Golden_Pond' wpa ie len 0 pairwise 1 group
> > 1 key mgmt 4
> >
> > Notice that there is no IE for this open unprotected network.
> >
> >
> > --
> > Cheers,
> > Cy Schubert <Cy.Schubert at cschubert.com>
> > FreeBSD UNIX: <cy at FreeBSD.org> Web: http://www.FreeBSD.org
> > NTP: <cy at nwtime.org> Web: https://nwtime.org
> >
> > e**(i*pi)+1=0
> >
> >
> > Cy Schubert writes:
> > > I've been able to reproduce the problem locally.
> > >
> > > The difference between an open AP that I can associate to and one I canno
> t
> > > is:
> > >
> > > associates:
> > > wpa_driver_bsd_associate: ssid 'KQNGN3' wpa ie len 0 pairwise 1 group 1 k
> ey
> >
> > > mgmt 4
> > >
> > > Does not associate:
> > > wpa_driver_bsd_associate: ssid 'Golden_Pond' wpa ie len 13 pairwise 1 gro
> up
> >
> > > 1 key mgmt 4
> > >
> > > The Information Element appears to cause it to use WPA on an open network
> .
> > >
> > >
> > > --
> > > Cheers,
> > > Cy Schubert <Cy.Schubert at cschubert.com>
> > > FreeBSD UNIX: <cy at FreeBSD.org> Web: http://www.FreeBSD.org
> > > NTP: <cy at nwtime.org> Web: https://nwtime.org
> > >
> > > e**(i*pi)+1=0
> > >
> > >
> > > Cy Schubert writes:
> > > > I have a user with AR9285 who was able to associate with and use an ope
> n
> > ne
> > > tw
> > > > ork
> > > > (WHU-STU in the list below).
> > > >
> > > > % ifconfig wlan0 scan
> > > > SSID/MESH ID BSSID CHAN RATE S:N
>
> > I
> > > NT
> > > > CAPS
> > > > WHU-STU 70:d9:31:0e:5e:20 1 54M -81:-96
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > CU_3n2r 80:ee:25:a7:af:c8 6 54M -93:-96
>
> > 1
> > > 00
> > > > EP RSN WPS HTCAP WME BSSLOAD
> > > > HUAWEI-4QGNEY 5c:03:39:dd:2e:7c 11 54M -87:-96
>
> > 1
> > > 00
> > > > EPS HTCAP WME ATH WPS RSN
> > > > WHU-STU 70:d9:31:03:06:40 13 54M -92:-96
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > WHU-STU 70:d9:31:03:19:e0 13 54M -93:-96
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > Xiaomi_102 50:d2:f5:87:7a:5a 2 54M -91:-96
>
> > 1
> > > 00
> > > > EP APCHANREP APCHANREP WPA RSN WPS HTCAP WME BSSLOAD
> > > > ChinaNet-r6xR ec:f0:fe:71:ea:53 3 54M -93:-96
>
> > 1
> > > 00
> > > > EPS WPA RSN HTCAP WME BSSLOAD
> > > > ChinaNet-wqSx 6c:d2:ba:94:73:d3 4 54M -93:-96
>
> > 1
> > > 00
> > > > EPS WPA RSN HTCAP WME BSSLOAD
> > > > WHU-STU fc:b6:98:f5:cc:00 5 54M -85:-96
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > WHU-STU 70:d9:31:0e:2c:00 5 54M -73:-96
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH # <-------- the one supposed to work
> > > > WHU-STU 70:d9:31:0e:19:20 5 54M -86:-96
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > WHU-STU fc:b6:98:f6:01:a0 5 54M -88:-96
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > WHU-STU 70:d9:31:0e:1b:e0 5 54M -94:-96
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > CMCC-UKg3 14:ad:ca:ce:ea:fe 8 54M -94:-96
>
> > 1
> > > 00
> > > > EPS APCHANREP APCHANREP WPA RSN HTCAP WME BSSLOAD
> > > > WHU-STU fc:b6:98:f6:0a:20 9 54M -81:-95
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > WHU-STU 70:d9:31:12:9b:80 9 54M -85:-95
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > WHU-STU fc:b6:98:f5:cc:80 9 54M -85:-95
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > > WHU-STU fc:b6:98:f6:22:80 9 54M -92:-95
>
> > 3
> > > 00
> > > > ES HTCAP WME ATH
> > > >
> > > > When using wpa_supplicant 2.9 they are able to associate and dhclient i
> s
> > ab
> > > le
> > > > to
> > > > obtain an IP address:
> > > >
> > > > wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
> 15
> > 00
> > > > ether 1c:4b:d6:ca:3e:ac
> > > > inet 10.134.135.167/17 broadcast 10.134.255.255
> > > > groups: wlan
> > > > ssid WHU-STU channel 13 (2472 MHz 11g ht/20) bssid fc:b6:98:f6:
> 12
> > :8
> > > 0
> > > > regdomain 96 indoor ecm authmode OPEN privacy OFF txpower 20 bm
> is
> > s
> > > 7
> > > > scanvalid 60 protmode CTS ampdulimit 64k shortgi -stbctx stbcrx
> -
> > ld
> > > pc
> > > > -uapsd wme burst roaming MANUAL bintval 300
> > > > parent interface: ath0
> > > > media: IEEE 802.11 Wireless Ethernet MCS mode 11ng
> > > > status: associated
> > > > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
> > > >
> > > > However using wpa_supplicant 2.10 they associate 50% of the time but 10
> 0%
> > o
> > > f
> > > > the
> > > > time are unable to communicate with the AP:
> > > >
> > > > wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
> 15
> > 00
> > >
> > > >
> > > > ether 1c:4b:d6:ca:3e:ac
>
> >
> > >
> > > >
> > > > inet 0.0.0.0 netmask 0xff000000 broadcast 255.255.255.255
>
> >
> > >
> > > >
> > > > groups: wlan
> > > > ssid WHU-STU channel 5 (2432 MHz 11g ht/20) bssid 70:d9:31:0e:2
> c:
> > 00
> > >
> > > >
> > > > regdomain 96 indoor ecm authmode WPA privacy MIXED deftxkey UND
> EF
> >
> > >
> > > >
> > > > txpower 20 bmiss 7 scanvalid 60 protmode CTS ampdulimit 64k sho
> rt
> > gi
> > >
> > > >
> > > > -stbctx stbcrx -ldpc -uapsd wme burst roaming MANUAL bintval 30
> 0
> >
> > >
> > > >
> > > > parent interface: ath0
> > > > media: IEEE 802.11 Wireless Ethernet DS/1Mbps mode 11ng
>
> >
> > >
> > > >
> > > > status: associated
> > > > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
> > > >
> > > >
> > > > Wpa_supplicant 2.10 configures the device with:
> > > > authmode WPA privacy MIXED deftxkey UNDEF
> > > >
> > > > While with wpa_supplicant 2.9 the following are correctly set:
> > > > authmode OPEN privacy OFF
> > > >
> > > > It appears that wpa_supplicant has configured WPA even though the follo
> wi
> > ng
> > > a
> > > > re in wpa_supplicant.conf.
> > > >
> > > > network={
>
> >
> > >
> > > >
>
> >
> > >
> > > >
> > > > ssid="WHU-STU"
>
> >
> > >
> > > >
>
> >
> > >
> > > >
> > > > key_mgmt=NONE
>
> >
> > >
> > > >
>
> >
> > >
> > > >
> > > > }
> > > >
> > > > The same drivers are in use.
> > > >
> > > > What am I missing? Or is there something else going on?
> > > >
> > > >
> > > > --
> > > > Cheers,
> > > > Cy Schubert <Cy.Schubert at cschubert.com>
> > > > FreeBSD UNIX: <cy at FreeBSD.org> Web: http://www.FreeBSD.org
> > > > NTP: <cy at nwtime.org> Web: https://nwtime.org
> > > >
> > > > e**(i*pi)+1=0
> > > >
> > >
> > >
> >
> >
>
>
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