[CentOS] testing a udp socket with netcat

Les Mikesell lesmikesell at gmail.com
Wed Mar 14 13:37:22 UTC 2012

On Wed, Mar 14, 2012 at 8:25 AM, Arif Hossain <freefall1986 at gmail.com> wrote:
> i've this udp daemon which is waiting for an incoming udp datagram. now
> i want test this daemon for random garbage to test how it behaves. My
> udp daemon is running because its shows on netstat. problem is if i
> issue following command for putting udp datagram :
> $nc -uvvz <host> <port>
> it does not output any thing. i have straced the udp daemon. which does
> not returns from recv() call.
> my goal is to put arbitrary data on the udp socket by netcat. i do not
> have any experience regarding netcat so i'm asking if anyone can help me
> out with this.

Do you have iptables running?   The default config would probably
block your udp traffic.

   Les Mikesell
     lesmikesell at gmail.com

More information about the CentOS mailing list