CGNAT and DDNS

[mburnside]

Yeah, seems to do the same if I use either manually entered or the mac address actually.

Using port 6200 and 5554 here!

Thank you once again.

[mburnside]

Anyone got any other ideas here?

Guess the port forwarding must be okay as like I said if I restart the DVR it forces the DDNS to go through again.

[mburnside]

A bit more information on this problem.

Just had a customer run a few checks for me.

DDNS service was not working. Swapped the 2nd DNS server for the DVR to 8.8.8.8 and force checked the DDNS name. Service began working as expected.

Customer then rebooted the router to force an IP change and could no longer connect. Force checked the DDNS host name in the DVR and connection could be made again.

Here are the trace results.

TraceRoute from Network-Tools.com to 81.139.135.54 [slackwoodhouse.dvrlink.net]

Hop

(ms)

(ms)

(ms)

IP Address

Host name

1

1

0

0

129.250.202.253

xe-0-4-0-12.r01.dllstx04.us.bb.gin.ntt.net

2

0

0

0

129.250.2.10

ae-1.r20.dllstx09.us.bb.gin.ntt.net

3

34

33

Timed out

129.250.3.50

ae-3.r20.asbnva02.us.bb.gin.ntt.net

4

39

35

35

129.250.4.5

ae-0.r21.asbnva02.us.bb.gin.ntt.net

5

120

120

129

129.250.2.145

ae-2.r23.amstnl02.nl.bb.gin.ntt.net

6

127

125

127

129.250.4.125

ae-0.r22.amstnl02.nl.bb.gin.ntt.net

7

119

119

143

129.250.5.197

ae-5.r23.londen03.uk.bb.gin.ntt.net

8

121

120

122

129.250.6.55

ae-7.r00.londen10.uk.bb.gin.ntt.net

9

131

131

137

82.112.101.74

-

10

142

132

132

166.49.214.197

166-49-214-197.eu.bt.net

11

131

130

131

213.121.193.104

core4-te0-12-0-12.faraday.ukcore.bt.net

12

130

131

129

109.159.249.172

acc2-10gige-0-3-0-2.l-far.21cn-ipp.bt.net

13

131

129

129

109.159.249.237

-

14

150

150

151

217.41.168.108

-

15

140

140

139

217.41.168.146

-

16

134

134

134

213.120.177.101

-

17

131

136

131

213.120.178.148

-

18

158

159

159

81.139.135.54

host81-139-135-54.in-addr.btopenworld.com

Trace complete

Thanks guys!

[Keith_Beddoe]

Have you set up the home hub to automatically update your IP address? The facility to do this depends on whether you are using one of the build in services.

[mburnside]

Yeah we're not using the routers DDNS it's a 3rd party DDNS service and we have checked more than 1 service too.

Thanks

[Keith_Beddoe]

It possible that BTs Web address help is upsetting the DDNS host name lookup.

Make sure the affected people are opted out.

http://preferences.webaddresshelp.bt.com/selfcare/

[mburnside]

Can't check this at the moment but is this something assigned to the customers connection? It looks like it affects only the customers PC/browser?

Thanks

[Keith_Beddoe]

It intercepts invalid DNS requests and redircect them to a list of suggested sites. Its done at network level, so will affect all devices connected to the customers connection.

Its know to give problems with VPN connections as well.

[mburnside]

Thanks for that then, I shall give it a go.

[mburnside]

Can anyone at BT assure me that the DNS settings used by dvrlink.net should be fine using BT broadband?

Here is the results from the intoDNS lookup.

http://www.intodns.com/dvrlink.net

Regards

M