Michael Thomas <[email protected]> wrote:
    >> Do you mean things like phone service sold by, for instance, incumbent 
cable operators?
    >> The ATA is generally built into the NAT/modem.  Sometimes the cable 
operator
    >> provides two modems, one for phone.  I have seen Rogers in Ottawa do 
both.

    mt> No, no, I mean smart phones connected to say, 3g cellular. Are they 
behind, say,
    mt> VZW's firewall, or are they on their own firewallwise?

My 3G experience has all involved NAT and IPv4.
So there was a unidirectional SYN firewall.  I've seen port-25 and port-139
blocked, but that was all.

I don't know what happens when there IPv6.

--
]               Never tell me the odds!                 | ipv6 mesh networks [
]   Michael Richardson, Sandelman Software Works        | network architect  [
]     [email protected]  http://www.sandelman.ca/        |   ruby on rails    [


--
Michael Richardson <[email protected]>, Sandelman Software Works


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