[mythtv-users] MythTV Raspberry Pi 2+ MythFrontend Setup Tutorial Updated

[Gary Buhrmaster]

On Tue, Mar 15, 2016 at 6:30 PM, Greg Woods <greg at gregandeva.net> wrote:
>
> On Tue, Mar 15, 2016 at 12:11 PM, Gary Buhrmaster
> <gary.buhrmaster at gmail.com> wrote:
>>
>> Well, the DNSBL source might be wrong, or your
>> ISP could be using an open proxy
>
>
> Another thing I have seen happen is, unless you are paying for "business"
> class service from your ISP, your IP address is likely dynamic, which means
> while it might stay the same almost all of the time, there is no guarantee
> of that, and you could be assigned an IP address that was previously in use
> by another customer. In that case you could be getting listed because of
> actions of the previous holder of that IP. That is a common source of  DNSBL
> listings for IP addresses not currently engaged in bad activity.

Agreed, but typically those are the SPAM lists(*), and not the open
proxy lists (which are usually, but not always, maintained differently).
So, you have to check the various blacklists, and verify WHICH
list you are actually on.  The number of open proxy IPs tends to
be more targeted than some of the others.  As always, your
DNSBL provider will vary.



(*) And be aware that most ISPs consumer IPs are marked
as being (recommended) to block for email sourcing, since
unauthenticated email is presumed to not be legitimately
source from those IPs (often they are lumped into the "dialup
user" category due to the historical names used).  People
will, of course, disagree as to whether consumers should be
able to send unauthenticated email, but as there is no
disagreement that some spoofed source SPAM is sent
from those locations, some will choose to be aggressive
with blocking.