A underlying difficulty w/ the emergency broadcast is that ISPs are not required to issue such alerts (unlike radio/TV stations), so you don't have the benefit, however mild, of ensured cooperation by your own service provider the next level up or by local authorities.
I would see at a lot of difficulty trying to gracefully intercept port 80 traffic to display any warnings, especially if the user is not actively browsing but using other services. Intercepting port 443 traffic is never going to happen gracefully, unless you're the NSA. I think content filtering vendors like Sonicwall do vaguely similar intercepts via DNS overrides, but they're not trying to butt into established TCP streams. Independent of how the affected (W)ISP operates, I've frequently seen urgent alerts go out over email and/or services like Nixle.com, subsequently forwarded to listservs, and otherwise scattered to the winds. Since WISPs ultimately aren't required to relay emergency broadcasts, perhaps the best approach would be to energetically encourage interested users to sign up for email/SMS alerts? On Thu, Aug 16, 2012 at 3:37 PM, Kristian Hoffmann <kh...@fire2wire.com>wrote: > What about adding the IP address to a address list with > action=add-src-to-address-list, and bypassing the rule if it matches the > list? You could have the entry timeout every hour so people would only get > it once every hour. I haven't thought it all the way through, but it > should be doable. > > NGL, we're in the central valley, so let me know if you need a hand, > equipment, etc. You have some neighboring WISPs on the California list ( > califor...@wispa.org) that may be able to lend a hand as well. > > -Kristian > > > On 08/16/12 12:39, Steve Barnes wrote: > > No you cannot force something on their normal screen. But what Josh was > stating was you can setup a Redirection so that any client that opens a > browser and tries to go to a website will be redirected to a site of your > choice. Now that works good but that is all they would get. Like Chris > stated if you have a Mikrotik in the line you can enable the hotspot so > that they would get a splash page for until the hit a continue button. > Neither are a very good option.**** > > ** ** > > Steve Barnes**** > > General Manager**** > > PCS-WIN / RC-WiFi <http://www.rcwifi.com/>**** > > ** ** > > *From:* wireless-boun...@wispa.org > [mailto:wireless-boun...@wispa.org<wireless-boun...@wispa.org>] > *On Behalf Of *~NGL~ > *Sent:* Thursday, August 16, 2012 3:21 PM > *To:* WISPA General List > *Subject:* Re: [WISPA] Emergency Broadcast**** > > ** ** > > I would like to send it out to all clients, to be seen on their monitor. * > *** > > NGL**** > > *From:* Steve Barnes <st...@pcswin.com> ** ** > > *Sent:* Thursday, August 16, 2012 12:15 PM**** > > *To:* WISPA General List <wireless@wispa.org> **** > > *Subject:* Re: [WISPA] Emergency Broadcast**** > > ** ** > > What do you mean by emergency broadcast? Free service to any customer for > a while or actually send out a communicating broadcast. If so how do you > expect others to receive it.**** > > ** ** > > Steve Barnes**** > > General Manager**** > > PCS-WIN / RC-WiFi <http://www.rcwifi.com/>**** > > ** ** > > *From:* wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] *On > Behalf Of *~NGL~ > *Sent:* Thursday, August 16, 2012 3:09 PM > *To:* WISPA General List > *Subject:* [WISPA] Emergency Broadcast**** > > ** ** > > We just had a 8000 acre fire go through our area. Called the Wye Fire. In > fact it is only 75% contained at this time. I came within 1/2 mille of my > main tower for that area. 450 families were forced to evacuate with very > little notice/ The phone lines went down about 2 hours prior to evacuation. > There is no cell phone or television service in the area.**** > > What I would like to do is do an emergency broadcast from the AP's to the > clients. Is this possible?**** > > **** > > NGL**** > > **** > > **** > > If you can read this Thank A Teacher. > And if it's in English Thank A Soldier!**** > > ** ** > ------------------------------ > > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless**** > > > > _______________________________________________ > Wireless mailing > listWireless@wispa.orghttp://lists.wispa.org/mailman/listinfo/wireless > > > > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless > > -- Ben West http://gowasabi.net b...@gowasabi.net
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