@bf you're welcome 🙂

I sniffed with TCPDUMP in my FreeBSD netbook what's going on on
first requesting with firefox some web page:

FF starts and asks the (local) DNS at IP 192.168.179.1 port 53
for the IP addr of A? detectportal.firefox.com

DNS answer: CNAME detectportal.firefox.com.edgesuite.net.,

CNAME a1089.d.akamai.net., A 92.226.1.104

FF makes HTTP request to 92.226.1.104 and sends

HTTP: GET /success.txt

92.226.1.104 (and this is perhaps not the answer of 92.226.1.104, but sent by the local AP):

HTTP/1.0 302 Moved Temporarily
Location: http://192.168.179.1:8186/untrusted_guest.lua.

which FF now let bring up the landing/login page of the AP

But, this (HTTP redirect) is only one of more arts to direct a browser to
a login page; see also: https://en.wikipedia.org/wiki/Captive_portal

I also would suggest a good organized description in the Wiki about some common methods to try in UT/UB to get to the login page of the local Wifi AP.

matthias

@vadrian89 Not to worry. Thanks for taking the time to look and reply...and for keeping the thread alive. Maybe someone out there who knows GO will be willing to have a look. Textsecure is a great messaging app and it would be an asset to have it available and working for the Ubuntu phone.