NikolasCo's dashboard

Thanks for reply. I am using an ubuntu derivative. I don't think there is any software firewall. One suspicious thing I noticed - I configured wuala to listen on port 4004. Here is what netstat shows:

fedor@fedor-laptop:~$ netstat -u -l

Active Internet connections (only servers)

Proto Recv-Q Send-Q Local Address Foreign Address

State

udp 0 0 *:32769 *:*

udp 0 0 *:bootpc *:*

udp 0 0 *:mdns *:*

udp 0 0 fedor-laptop:ntp *:*

udp 0 0 localhost:ntp *:*

udp 0 0 *:ntp *:*

udp6 0 0 *:4004 *:*

udp6 0 0 *:26183 *:*

udp6 0 0 *:26184 *:*

udp6 0 0 fe80::216:6fff:fea7:ntp *:*

udp6 0 0 ::1%134619192:ntp *:*

udp6 0 0 *:ntp *:*

as you can see it's listening on udp6, but not udp. I wonder if this is the cause of the issue. Thanks!

PS. oops this does not seem to format well, but you get the idea... – fedor, on June 07, 2008 06:40

Maybe you need to configure your (software-) firewall. This is definitively the case for SUSE. Maybe with other distros too. – Roger, on June 06, 2008 06:38

I still seem to be having this issue. Router is set up (manually) and I tried editing /etc/hosts , but it does not help. – fedor, on June 05, 2008 19:51

As Luzius said, we've just added it: http://download.wua.la/en/linux_dl.html
Thanks again!

Thanks for the hint. We'll add that to our website.

Correction: it doesn't use the first entry in /etc/hosts; it's just continuing the lookup of the hostname (fetched via the uname system call, a la uname -n). So, if you add an /etc/hosts entry for the currently configured IP address, UPnP works as expected.

This doesn't fix the issue for me because 1) I'm behind at least two layers of NAt at the moment and 2) I'm using a laptop, which wanders a lot... A system-config workaround is unsavory, though; enumerating the current interfaces seems like the way to go, probably after using getLocalHost and calling isLoopback on that, so well-configured systems can specify their "default" IP.

The code is trivial, so I haven't bothered posting it ... I've just been fiddling with a separate test class/program to figure out what's going on (in combination with strace -f) and what the "right" solution might be ...

@NIkolasCo: If that's the case, you should be able to hack /etc/hosts to work around the problem, correct? BTW, this also implies that a multi-homed Linux machine might have problems because it may return an address for the wrong local interface.

I had exactly the same problem(s) on a P2P software product that I worked on. If you need me to patch the code for the linux version, just let me know :-)

Ivan...

I've had at least a similar issue with UPnP configuration. My "router" has UPnP request logging, so I was able to see the following:
1 02/08 07:26:59 add port failed 127.0.1.1 7453 UDP 7453
I didn't immediately trust this, and did a package capture to confirm it; Wuala is sending a SSDP/SOAP message with NewInternalClient set to 127.0.0.1

Looking into the issue further, I suspect that Wuala uses java.net.INetAddress.getLocalhost(); on Linux this often doesn't work (it tries to lookup hostname via DNS, and seems to fall back to just reading the first line of /etc/hosts). It seems that using NetworkInterface.getInterfaces() is necessary...