Fw: Hostapd AP SSID broadcast problem

[M. Braun]

Hi,

if you don't see any beacons or management frames but data frames, you
might not be sniffing properly. Beacons are always sent out in AP mode,
regardless of whether ssid hiding is enabled or not. Data frames do not
carry SSID.

Regards,
 M. Braun

Am 17.11.2015 um 21:13 schrieb Pertti Niinimäki:
> Hi Alex,
> 
> Just trying to be bit more clear, I'm want that hostapd is sending SSID
> out to
> "everybody willing to listen" -  so I do not want to hide or eliminate it.
> I can patch and compile Hostapd if there is any trick to make it happen.
> From the hostapd.conf point of view, I began to wonder if broadcasting of
> SSID is the option not available in Hostapd?
> 
> Regards
> Pertti N
> 
> 
> 
> -----Alkuperäinen viesti----- From: Pertti Niinimäki
> Sent: Tuesday, November 17, 2015 9:38 PM
> To: Alexandre Epert
> Cc: hostap at lists.infradead.org
> Subject: Re: Hostapd AP SSID broadcast problem
> 
> Hi Alex,
> 
> Thanks for your comments. Yes I have only one wireless camera at the
> moment.
> Remote location
> (my cottage) is about 100 km away, so that I'm currently operating
> everything from my home location.
> As you suggested I tested hostapd.conf commenting out
> "ignore_broadcast_ssid" but it didn't
> change the broadcast behaviour.
> 
> Some other things I found from debug data using "-d" argument. Debug
> records
> are showing
> beacon hex data and voila, SSID is correctly inserted in.
> The problem seems to be that this specific beacon data is not sent out.
> Only
> records AP is sending
> out are identified as ARP queries not containing SSID.
> When I'm comparing that with  trace from ZyXEL ADSL router,  it is
> transmitting ARP queries and also
> identified as 802.11 records which contain AP's SSID identification.
> 
> I'm not fully sure if my IPS camera is waking up when it sees correct
> Access
> Point, but that's what
> I still believe.
> 
> For my remote operations I have  ZyXEL ADSL-router with Wifi option, two
> Raspberry Pi's as
> LAN network, other one having internet connection with WWAN mobile stick.
> If something is down I can use backup routes.
> 
> Regards
> Pertti N
> 
> 
> -----Alkuperäinen viesti----- From: Alexandre Epert
> Sent: Tuesday, November 17, 2015 5:13 PM
> To: Pertti Niinimäki
> Cc: hostap at lists.infradead.org
> Subject: Re: Hostapd AP SSID broadcast problem
> 
> Hi,
> 
> If I understand you have 1 camera which is not working when you try to
> hide SSID.
> 
> Have you tried your conf without "ignore_broadcast_ssid" option?
> Do you have this problem with 1 equipment or more?
> 
> I use this hostapd.conf file :
> 
> interface=wlan0
> bridge=br0
> #hw_mode=g
> channel=6
> ieee80211d=1
> country_code=FR
> ieee80211n=1
> #ieee80211ac=1
> wmm_enabled=1
> ignore_broadcast_ssid=0
> ctrl_interface=/var/run/hostapd
> ctrl_interface_group=0
> ssid=Whatever
> 
> I can hide SSID if need to with that configuration file.
> 
> 
> Regards,
> 
> Alex
> 
> 2015-11-17 10:08 GMT+01:00 Pertti Niinimäki <itprosenior at welho.com>:
>> Hi
>> Based on WireShark analysis, I have not been able to configure Hostapd to
>> broadcast SSID. My problem
>> is ‘sleeping’ remote IP security camera connected via Wifi to
>> Raspberry Pi.
>> Only ARP records are sent
>> out periodically or when pinging the bridged static IP address for the
>> camera, but no SSID broadcasting.
>> Wifi is in its own subnet bridged (br0) to Raspberry and mobile PPP0
>> interface.
>> In the same installation but nor directly connected the SSID from  ZyXEL
>> ADSL modem can be listened correctly
>> with Raspberry's  WireShark.
>>
>> I compiled latest version (hostapd v2.3)  into Raspberry, replacing v1.0,
>> but it  didn’t change anything.
>> Testing  hostapd.conf setup for “ignore_broadcast_ssid” with different
>> values was no help either
>> for the problem.
>> Looking into source code, it seems like value “1” should do the trick to
>> beacon ssid, but no success?
>> Following are  config parameters used:
>> interface_wlan0
>> bridge=br0
>> driver=nl80211
>> hw_mode=g
>> channel=8
>> ssid=XxXxXX (not shown)
>> beacon_int=100 (ok with hostapd > 15)
>> dtim_period=2
>> macaddr_acl=0
>> auth_algs=1
>> ignore_broadcast_ssid=(0 or 1 or 2 or 3 tested)
>> wpa=2
>> wpa_passphrase=xxxxxxxxxx(not shown)
>> wpa_key_mgmt=WPA-PSK
>> wpa_pairwise=TKIP
>> rsn_pairwise=CCMP
>> country_code=FI
>> wpa_ptk_rekey=18000
>> radius_acct_interim_interval=36000 (not needed extra ?)
>>
>> The driver is:  rt2800usb
>>
>> Normally the the link Wifi-IPS camera works ok, but probably due to some
>> disturbance the camera
>> may be dropped out. I want to test if broadcasting AP SSID could wake
>> it up.
>>
>> Pertti Niinimäki
>> itprosenior at welho.com
>>
>>
>>
>> _______________________________________________
>> Hostap mailing list
>> Hostap at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/hostap 
> 
> 
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