Hi Sebastian,

On Jan 24, 2011, at 2:27 PM, Sebastian Proca wrote:

> I'm using Ubuntu 10.04 with 2.6.32-27 kernel. 
> So, I've been following your advice and put wireshark to check the packages 
> on the lo "wire". Besides the "Destination unreachable(Host unreachable)" 
> message that I receive I can see the flow from Source port 40673 to 
> Destination port 23232 both on 127.0.0.1, of course. Is this (at least) 
> flow's correct behaviour? Besides this messages I don't get anything else.

"Destination unreachable" tells you that you're not running a server or it's 
blocked by a firewall.

Have you updated your OpenSSL installation? Ubuntu 10.04 comes with an old 
0.9.8 release in which the DTLS implementation is entirely broken. You need to 
update OpenSSL to at least 1.0.0a. Make sure that you either overwrite your 
base installation or use appropriate paths when compiling. A "./configure && 
make && make install" installs to /usr/local which is ignored because you 
already have an installation in /usr by default. So either configure OpenSSL 
with --prefix=/usr to overwrite your default installation or compile your 
client and server with -L and -I to the lib and include paths where you 
installed the newer OpenSSL, e.g. "-L/usr/local/lib -I/usr/local/include".

Best regards
Robin







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