I answer to myself.
In fact it was a firewall problem. I did not notice it because I have
killed the firewall process to be sure. Now I know it is not the best
way. By authorizing properely UDP on the right adresses and network it
works better.
So sorry for spamming with a firewall issue.
Now it is still strange because one of the PC cannot send or receive the
data from the pcap, where only difference is "IP source", which is not
on the same network. However the second PC has no problem with "IP
source" from other networks... The only difference between the two
network config is in the windows "DNS window" In the window I can't
change anything, even in admin, in the DNS setting forced to a specified
list of DNS. That may come frome this. But I cannot change this
parameter... I will see with sysadmin.
By the way, thanks for the great tool, which wireshark is :).
Sincerelly,
JBD
Le 09/03/2012 01:21, Jean-Baptiste Delpy a écrit :
Hello,
I have recorder UDP traffic (video streaming) with wireshark on a
listenning computer. Now I'm trying to play it back on the emitting
computer. But this is not working. I've tried it out with both Playcap
and "Packet player" but i looks like more a OS (Windows 7) or network
configuration issue. However "Packet Player" officially does support
Windows 7.
Both UDP Unicast and multicast doesn't work. I've tried without
firewall at all and it does not change (and it worked with the
firewall when I recorded the data).
If I look to stats in netstat nothing is coming out from the
interface. So it is not a router issue.
If I test with IGMP packets records as for ping, it works perfectly.
So the problem seems to be only UDP data.
May be my pcap filedoes not include some "initiating packets" that
will activate the UDP output on my interface ? Is it normal to have
issue only with UDP packets ?
Thanks for your help in advance,
Sincerely,
JBD
