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37 posts

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#195463 20-Apr-2016 19:09
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I have an issue with Fritzbox 7490, accessing my dynamic DNS from my internal network and only with android devices. I run a couple of cameras with sighthound and access them away from home with a dynamic dns server and port forwarding, which is working perfectly. I can access the cameras fine on my note4 when I'm on cell network, but once I'm connected to my home WiFi, it no longer works. If I use the internal IP address, my note4 will access them fine. This issue is only limited to android devices as my wives S5 has the same issue, but my iPad and laptop does not.

 

Externally (not at home)
{mydomain}.dyndns.org:XXXX => 192.168.X.X:XXXX    (works on everything)

 

Internal (on Wifi)
{mydomain}.dyndns.org:XXXX => 192.168.X.X:XXXX    (fails on Android Only)
192.168.X.X:XXXX   (works on everything)

 

I have looked around and the only thing I can come close to is a NAT loopback issue, but that doesn't explain why Android fails, but iPad and laptop works fine, nor explain how to fix. My parents and sister have the same setup and issue, so I know it's not limited to my modem.


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'That VDSL Cat'
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  #1536941 20-Apr-2016 19:32
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loopback is always an iffy thing... i recall it being reasonably consistent though on my 7390.

 

 

 

try a device reboot and see if it works?





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Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.

 




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  #1536974 20-Apr-2016 20:21
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Reboot does nothing. This has been issue from day one - about 3 months ago.


 
 
 
 


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  #1537577 21-Apr-2016 15:58
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Hey Sarge,

 

Sounds pretty odd, not something I've come across before.

 

 

 

I've done a bit of looking around, and came across this:

 

http://en.avm.de/service/fritzbox/fritzbox-7490/knowledge-base/publication/show/663_No-DNS-resolution-of-private-IP-addresses/

 

Doesn't explain why it works fine on other devices and not Android, could be a quirk of Android not resolving it locally, or caching the external addresses and therefore triggering the above.

 

Can you try adding the exception indicated in the article and let us know if that does the trick?

 

Thanks,

 

Ralph ^JOB




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Geek


  #1538565 23-Apr-2016 10:06
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I found that setting a week ago and tried it, though not 100% what to enter. Tried both dyndns.org and {mydomain}.dyndns.org but neither had any effect.

 

Also have tried to DMZ one of the internal IPs in case it was a port issue, but that did nothing either.




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#1541070 24-Apr-2016 11:21
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SOLVED

 

If I used my external IP address instead of DDNS it worked fine, narrowing the issue to Dymanic DNS. After a bit of playing, I found the issue is the Fritz!Box default settings for DynDns.
I have changed the Dynamic DNS provider from dyndns.org to user defined. For the Update URL field I entered members.dyndns.org/nic/update?system=dyndns&hostname=<domain>&myip=<ipaddr>

 

Restarted modem to ensure IP address would update on DynDNS side, which it did and my Android can now access my cameras via Dynamic DNS within my network.


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  #1541300 24-Apr-2016 18:49
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Sarge:

 

SOLVED

 

If I used my external IP address instead of DDNS it worked fine, narrowing the issue to Dymanic DNS. After a bit of playing, I found the issue is the Fritz!Box default settings for DynDns.
I have changed the Dynamic DNS provider from dyndns.org to user defined. For the Update URL field I entered members.dyndns.org/nic/update?system=dyndns&hostname=<domain>&myip=<ipaddr>

 

Restarted modem to ensure IP address would update on DynDNS side, which it did and my Android can now access my cameras via Dynamic DNS within my network.

 

 

Thats very interesting.. must be something in the default setup of it i suppose..





#include <std_disclaimer>

 

Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.

 


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  #1541955 26-Apr-2016 09:16
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Sarge:

 

SOLVED

 

If I used my external IP address instead of DDNS it worked fine, narrowing the issue to Dymanic DNS. After a bit of playing, I found the issue is the Fritz!Box default settings for DynDns.
I have changed the Dynamic DNS provider from dyndns.org to user defined. For the Update URL field I entered members.dyndns.org/nic/update?system=dyndns&hostname=<domain>&myip=<ipaddr>

 

Restarted modem to ensure IP address would update on DynDNS side, which it did and my Android can now access my cameras via Dynamic DNS within my network.

 

 

Nice find Sarge, glad you managed to get that sussed.

 

We'll be making note of it our end in case it pops up again. Can you please confirm what firmware version you are on?

 

Thanks,

 

Ralph ^JOB


 
 
 
 




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  #1544621 30-Apr-2016 20:41
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FRITZ!OS installed : 06.30


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