'enterprise security folks' are probably not the issue... The fact
remains
that lots of folks DO do this 
There are quite a few folks between
'consumer' and 'enterprise' that do all manner of dumb things on the
Internet (where 'dumb' is equivalent to running smb shares across the
public network minus encryption/ipsec). It's their choice to do that,
and
their network providers are expected/demanded to pass those packets for
them.
-Chris
Surely the ratio of 'useful' traffic compared to 'junk' for a particular
protocol must be considered. What percentage of netbios entering a
service provider's edge is intentional? 1%? 0.1%? I'm guessing much
less than that. If 5 or 6 nines worth of a particular protocol entering
or leaving an ISP's network is unintentional, and highly susceptible to
viral activity, isn't it in our best interest to block it? With proper
notification to subscribers and instructions on setting up host-to-host
PPTP/whatever, blocking netbios can solve a large bunch of issues....
Just my .02 though,
Chuck
>'enterprise security folks' are probably not the issue... The fact
remains
>that lots of folks DO do this There are quite a few folks between
>'consumer' and 'enterprise' that do all manner of dumb things on the
>Internet (where 'dumb' is equivalent to running smb shares across the
>public network minus encryption/ipsec). It's their choice to do that,
and
>their network providers are expected/demanded to pass those packets for
>them.
>-Chris
Surely the ratio of 'useful' traffic compared to 'junk' for a particular
protocol must be considered. What percentage of netbios entering a
on your piece of the network you can consider the ratio of pigs to birds,
or good to bad traffic or phases of the moon, it's your network do what
you will. I can say that if you have a vocal enough customer the blocks
won't last very long, or the customer will find another network to connect
to...
service provider's edge is intentional? 1%? 0.1%? I'm guessing much
less than that. If 5 or 6 nines worth of a particular protocol entering
or leaving an ISP's network is unintentional, and highly susceptible to
viral activity, isn't it in our best interest to block it? With proper
your best interest might be to do that sure... 'your network, your call'.
notification to subscribers and instructions on setting up host-to-host
PPTP/whatever, blocking netbios can solve a large bunch of issues....
please send my instructions for host-to-host pptp that my grandmother can
follow without help of techsupport.