[mythtv-users] HDHomeRun Zero Byte Recording but work fine through HDHomeRun GUI

[Joseph Fry]

> Why the heck would you have two DHCP servers on your network?  Solve this

> > problem first.
>
> Hehe, I knew that question would get asked.  The reason was because I
> was out of town for a period when the BE server went down in a lengthy
> power cut and didn't turn on when power was restored as it is
> configured to do.  So for a period of time I was away, the rest of the
> family was stuck without internet access (which seems to have annoyed
> them a lot).  It is possible to configure dhcp3-server in a
> primary/secondary configuration, but the modem obviously doesn't
> support that through the user GUI.  Now I have a raspberry Pi, I might
> configure that as a backup secondary DHCP server and eliminate the
> modem as a server.
>
> >
> > I remember mythtv didn't play nice when the HDHR IP address changes while
> > mythbackend is still running.  My situation was that mythbackend started
> up
> > prior to the HDHR obtaining a DHCP, so strangeness would happen.  I had
> to
> > modify the init scripts to wait for the HDHR networking to stabilize
> before
> > mythbackend starting.  However, this was several months back using 0.24.
>  I
> > am not sure if any recent changes went into this area.
> >
>
> So, it seems like it is possible that the IP changed after the backend
> made a connection to it.  Getting rid of the rogue DHCP server should
> resolve the problem.
>
> On Wed, Sep 12, 2012 at 3:29 AM, Ben Kamen <bkamen at benjammin.net> wrote:
> >
> > Which bring up another good point - "infrastructure" should not be on
> > changing IP's. It's ok to use DHCP to configure them on boot, but things
> > like all my manages switches and WAP's and HDHR are on assigned static
> > addresses in DHCP
>
> I agree.  My server statically assigns IP addresses to all of my
> 'infrastructure'...so long as the modem doesn't interfere!
>
> On Wed, Sep 12, 2012 at 5:19 AM, Joseph Fry <joe at thefrys.com> wrote:
> >
> > What I don't understand is why your Cable Modem is on the same network
> > segment as your HDHR or PC's?  You don't have some sort of router/gateway
> > device?
>
> On Wed, Sep 12, 2012 at 5:47 AM, Mike Perkins
> <mikep at randomtraveller.org.uk> wrote:
> >
> > Or... firewall?
>
> It is an ADSL modem that also does NAT and routing etc.  (
> http://homesupport.cisco.com/en-us/support/gateways/AM300 ) I am no
> network guru, but I believe this gives me adequate security.  Only a
> couple of ports are exposed on the WAN side.  Any other inbound
> traffic should get dropped.
>
> Confirmation of my networking assumptions would be greatly
> appreciated, since I don't want to expose myself, my family, or my
> data, unnecessarily.
>

You should be fine... that device is a gateway and DSL modem in one, and
I'm sure it does firewall the connection to a degree.

But I would eliminate a DHCP server. I generally stick to using the one in
my gateway for exactly the reasons you describe... sure it's a single point
of failure, but I keep an older backup on hand just in case it fails.  Of
course I use DD-WRT on mine, so I have full control over the DHCP server.
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