[mythtv-users] Help, frontends cannot connect to backend

stan stanb at panix.com
Sun Dec 31 16:20:34 UTC 2006

Aparently this was too big to ge fowarded to the list, so I've trimed the
logs a bit.

I've been ffighting this for 2 1/2 days now, so I'd REALLY appreciate ANY


I'm trying to rebuild my Myth infrastruccture this weekend. Historically,
I've use KnoppMyth, but I talked mysellf into using Ubuntu this time, as
I'm moving to Ubuntu workstations, and it seemed that would make keeping
the versions on the frontends/backend in synch easier.

I'm using Ubuntu 6.10 X86, and I'v mostly gotten teh backend working. It's
frontend can connect finw. I've got (at the moment) 3 frontends. All of
these (inclusing  one just built from scratch using the Howto on the Ubuntu
Help pages), can connect to the MySQL database, just fine. But, they cannot
seem to connect to the myth backend itslef. nmap shows, what I beleive are
the correct, ports open on the backend "panda":

Starting Nmap 4.10 ( http://www.insecure.org/nmap/ ) at 2006-12-31 10:05
Interesting ports on panda.fas.com (
Not shown: 1674 closed ports
22/tcp   open  ssh
80/tcp   open  http
3306/tcp open  mysql
6543/tcp open  mythtv
6544/tcp open  mythtv
MAC Address: 00:14:6C:81:E3:9C (Netgear)
Device type: general purpose
Running: Linux 2.4.X|2.5.X|2.6.X
OS details: Linux 2.4.0 - 2.5.20, Linux 2.4.7 - 2.6.11

Yet when I do a tcpdump on the new frontend, after starting the frontend,
and trying to "Watch V", I don't see any evidence of it trying to originate
traffic for the Myth backend. I _do_ see the MySQL traffic:

09:43:14.965352 IP boo-boo.fas.com.43901 > panda.fas.com.mysql: S 1793549980:1793549980(0) win 5840 <mss 1460,sackOK,timestamp 6872472 0,nop,wscale 2>
09:43:14.965432 IP panda.fas.com.mysql > boo-boo.fas.com.43901: S 466253708:466253708(0) ack 1793549981 win 5792 <mss 1460,sackOK,timestamp 11276762 6872472,nop,wscale 2>
09:43:14.965576 IP boo-boo.fas.com.43901 > panda.fas.com.mysql: . ack 1 win 1460 <nop,nop,timestamp 6872472 11276762>
09:43:14.966885 IP panda.fas.com.mysql > boo-boo.fas.com.43901: P 1:71(70) ack 1 win 1448 <nop,nop,timestamp 11276763 6872472>

09:43:28.267115 IP boo-boo.fas.com.43901 > panda.fas.com.mysql: P 44971:45058(87) ack 44901 win 1728 <nop,nop,timestamp 6873802 11280087>
09:43:28.267538 IP panda.fas.com.mysql > boo-boo.fas.com.43901: P 44901:44985(84) ack 45058 win 1448 <nop,nop,timestamp 11280088 6873802>
09:43:28.268693 IP boo-boo.fas.com.43901 > panda.fas.com.mysql: P 45058:45149(91) ack 44985 win 1728 <nop,nop,timestamp 6873802 11280088>
09:43:28.269216 IP panda.fas.com.mysql > boo-boo.fas.com.43901: P 44985:45069(84) ack 45149 win 1448 <nop,nop,timestamp 11280088 6873802>
09:43:28.269655 IP boo-boo.fas.com.43901 > panda.fas.com.mysql: P 45149:45235(86) ack 45069 win 1728 <nop,nop,timestamp 6873802 11280088>
09:43:28.270043 IP panda.fas.com.mysql > boo-boo.fas.com.43901: P 45069:45153(84) ack 45235 win 1448 <nop,nop,timestamp 11280088 6873802>
09:43:28.300755 IP boo-boo.fas.com.43901 > panda.fas.com.mysql: . ack 45153 win 1728 <nop,nop,timestamp 6873806 11280088>

So, I suppose the first question is, How does the frontend know the
namee/addeess of the Myth backend to atempt to connect to? Is it stored in
the database (makes sense that it would be, since the backend connects
directly to that).

What other things can I check to try to resolve this issue?

Thanks fro any help.

Unix is very simple, but it takes a genius to understand the simplicity.
(Dennis Ritchie)

----- End forwarded message -----

Unix is very simple, but it takes a genius to understand the simplicity.
(Dennis Ritchie)

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