Beirdobot, irc.freenode.net

Monday, January 30th, 2017, 00:02 UTC

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[10:02:00]

stuarta:

beginning to think my backend needs more cpu...

[10:03:06]

stuarta:

T-48hrs until release....

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[12:34:13]

stuarta:

interesting, i can see signalling for freesat 4k on astra....

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[13:14:37]

stuarta:

wtf is going on there. on astra, tsid 2057, setup is seeing different SDT's with different number of services....

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stuarta:

time to see what we can find via dvbscan & dvbsnoop

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peterbennett:

Time to learn how IPV6 works ... SOAPClient::SendSOAPRequest: request failed: http://[fe80::1c98:f936:7f9e:3afb]:6544/Myth

[15:43:34]

stuarta:

that's missing the link qualifier

[15:43:35]

peterbennett:

I think its using a link local address without specifying the interface.

[15:43:39]

stuarta:

yep

[15:44:00]

stuarta:

tbh, we should prefer globally scoped addresses if they are available

[15:44:02]

stuarta:

much simpler

[15:44:20]

stuarta:

peterbennett: feel free to ask me any ipv6 questions. i know a *lot* about it

[15:44:54]

** stuarta suspects TSID=2057 is broadcasting a multipart SDT **

[15:45:11]

ikevin:

ipv6 <3

[15:45:17]

stuarta:

ipv6++

[15:46:22]

peterbennett:

I am going to read some tutorials first. I am ignorant on the basics of IPV6 like what is a link local address and how does it work, how do you get a global scoped address, etc.

[15:55:03]

stuarta:

i would suggest glossing over the bits that waffle on about the address space, and replace with "it's big"

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stuarta:

i mean, really who cares that there are this many bits for this, that many bits for that....

[16:18:09]

stuarta:

sigh, they are sending a multipart SDT on some Astra mplexes

[16:37:29]

stuarta:

and i'm fairly sure our handling of such things is broken...

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[16:41:12]

peterbennett:

stuarta: So my router says I have an IPV6 address from Comcast but my computer only has a link-local address

[16:42:27]

peterbennett:

stuarta: I can choose DHCPv6 or SLAAC, but not sure how I get a global address for computers on the network.

[16:43:32]

stuarta:

i think comcast use ipv6 PD (Prefix Delegation) so in theory your router should have at least a /64 assigned

[16:44:06]

stuarta:

PD is the process which automates the handing out of the "prefix", ie the /64

[16:44:44]

peterbennett:

IPv6 Address Prefix: shows :: /64. It looks like I am supposed to put something in there

[16:45:20]

peterbennett:

Maybe I need to select "Get IPv6 prefix delegation."

[16:45:23]

stuarta:

that would be for SLAAC (ie. auto configuration of ipv6 addresses for equipment on your LAN)

[16:45:28]

stuarta:

yes, try that

[16:47:21]

peterbennett:

IPv6 Address: 2001:558:6017:132:115f:123:bca5:88f IPv6 Address Prefix: /0

[16:48:21]

stuarta:

i can ping you :-p

[16:49:00]

peterbennett:

http://ipv6.whatismyv6.com/ gives me unable to connect

[16:49:48]

stuarta:

apparently you can check here https://mydeviceinfo.xfinity.com/

[16:50:04]

stuarta:

and there's other stuff here http://www.comcast6.net/

[16:52:10]

peterbennett:

It tells me This device is not supported

[16:52:23]

peterbennett:

SURFboard SB6121 DOCSIS 3.0 Cable Modem

[16:52:49]

stuarta:

well i can certainly reach that address https://paste.fedoraproject.org/541174/14857951/

[16:52:51]

peterbennett:

Even though it says IPv6 Yes

[16:53:16]

stuarta:

try the reverse traceroute6 (to the ip in hop #1)

[16:53:16]

** MythLogBot http://code.mythtv.org/trac/ticket/1 **

[16:55:46]

peterbennett:

peter@andromeda:~$ traceroute6 2a02:390:790f:1::a

[16:55:46]

peterbennett:

connect: Network is unreachable

[16:57:01]

jheizer_:

Also on comcast

[16:57:15]

jheizer_:

You should get a /64 as he said

[16:57:21]

jheizer_:

and addresses to local machines

[16:57:44]

jheizer_:

maybe something on your router to allow dhcp on 1pv6 needs to be enabled to get addresses to the devices?

[16:58:55]

stuarta:

given i'm not even on the right continent, i'll leave jheizer_ to help you on that :)

[16:59:02]

jheizer_:

oh no

[16:59:03]

jheizer_:

lol

[16:59:06]

jheizer_:

I barely understand it

[16:59:07]

jheizer_:

haha

[16:59:10]

peterbennett:

the router has selected DHCPv6 with Get IPv6 prefix delegation. selected

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jheizer_ is now known as jheizer

[16:59:26]

jheizer:

unless you are on pfsense, then I could compare settings

[16:59:48]

peterbennett:

And I got back Pv6 Address: 2001:558:6017:132:115f:123:bca5:88f IPv6 Address Prefix: /0

[17:00:26]

peterbennett:

I suppose they want another $50 per month to allow something other than /0

[17:00:39]

jheizer:

my settings block beyond just saying enabled dhcp6

[17:00:40]

jheizer:

https://i91.photobucket.com/albums/k299/heeze . . . lpvv7umr.png

[17:00:58]

stuarta:

nah, they are rolling it out for everyone

[17:00:59]

jheizer:

I'm just a regular mid tier home user

[17:01:09]

stuarta:

also /0 is another way of saying "default route"

[17:01:16]

stuarta:

right time to run off

[17:02:25]

jheizer:

then I just have to check a box enabling DHCP6 server on LAN and the rest jsut works

[17:02:51]

jheizer:

and the default IPv6 warning, once the clients have an address they are internet addressable and should be firewalled. No NAT protection anymore.

[17:05:02]

peterbennett:

jheizer: So maybe i am setup wrongly on comcast

[17:06:17]

jheizer:

Maybe try a release/renew to start fresh

[17:07:30]

jheizer:

Honestly probably 3/4 of my ipv6 understand has come from lurking in here.

[17:08:03]

jheizer:

other than the cool it works factor, I've never done anything with or needed it.

[17:08:23]

peterbennett:

I tried release, the router rebooted, and I got the same thing again.

[17:17:55]

jheizer:

Weird. I'm not sure.

[17:18:05]

jheizer:

Here in central IL it has worked for a few years now IIRC.

[17:18:37]

peterbennett:

I guess I will have to call Comcast

[17:20:05]

peterbennett:

jheizer: which ISP are you on?

[17:20:10]

jheizer:

Comcast

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[18:35:54]

peterbennett:

jheizer: That was easy – I called Comcast and their automatic system sent my modem a reset. Now I have all my IPV6 addresses. I did not have to speak to a human to get it fixed.

[18:39:15]

jheizer:

Nice

[18:39:20]

jheizer:

Glad ot hear it was so easy

[18:39:30]

jheizer:

surprised that is in any way an automated process

[18:42:50]

peterbennett:

jheizer: Can you ssh 2601:183:102:b41:1cd9:30fe:26f0:1dbe to my system through the internet now?

[18:43:07]

jheizer:

yup

[18:43:07]

peterbennett:

I am wondering if I am now open to the world

[18:43:21]

jheizer:

yes you are

[18:43:23]

peterbennett:

Hmm dangerous

[18:44:46]

jheizer:

going back to the pre NAT days where windows systems were direct to the internet and viruses ran wild

[18:45:00]

jheizer:

really need a real firewall of filtering device out front with ipv6

[18:45:12]

jheizer:

or

[18:48:18]

peterbennett:

Hopefully IPV6 addresses are more difficult to guess

[18:51:47]

dhampton:

They are much more difficult to brute force, but there are other ways to get addresses. E.G. Run an ntp server and join pool.ntp.org.

[18:53:19]

jheizer:

clever

[18:54:19]

dhampton:

Saw that in a presentation last week (but can't remember where).

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dekarl1 is now known as dekarl

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dekarl:

can we answer this question from bill meek with smolt data? https://plus.google.com/u/0/10494071338509220 . . . kncnP?cfem=1

[19:39:16]

dekarl:

stuarta, I also have had moments where I was pretty sure that wrong handling of SDT with more then one section led to issues in channel scans. e.g. scanning a pure DVB-C service leads to lots of MPEG and some SCTE channels... lots of MPEG makes sense when you only get half the SDT

[19:41:31]

dekarl:

the NTP server for harvesting active IPs is a nice trick

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bill6502:

dekarl: Good idea! I forgot about Smolt, it has a MythTV Version & Branch sections that may be the clue I was looking for. I'm suggesting using the <BE>:6544/<Service>/version rather than GetBackendInfo

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