I have an Amazon EC2 (Amazon Linux) server with port 9930 open
I have a simple test program:
http://pathogen.myftp.org/test.cpp
When I run it and try to telnet port 9930 it says
Could not open connection to host, on port 9930: Connect failed
Why?
0
Amazon EC2 UDP connect failed
Started by polyfrag, Jul 01 2012 07:07 PM
9 replies to this topic
#2 Members - Reputation: 423
Posted 01 July 2012 - 08:52 PM
There has been a lot of power outages, and I know that amazon's cloud services have been severely affected.. http://hardware.slashdot.org/story/12/06/30/162250/more-uptime-problems-for-amazon-cloud
#3 Moderators - Reputation: 7557
Posted 01 July 2012 - 11:28 PM
You have opened a socket using UDP. Telnet is a TCP-based utility. Basically, you're calling a phone number in China and asking why they aren't speaking French ;-)
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#6 Members - Reputation: 675
Posted 02 July 2012 - 05:29 PM
Yep, UDP port open.please test if you have UDP ports opened in your 'security group'
To test sockets in general, and UDP sockets specifically, use the "netcat" program.
This works:
nc -u
ec2-50-19-202-144.compute-1.amazonaws.com
9930But my game still doesn't... mmm.
Edited by polyfrag, 02 July 2012 - 05:30 PM.
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#7 Members - Reputation: 675
Posted 02 July 2012 - 06:38 PM
Even this sample program doesn't work
http://www.tenouk.com/Winsock/Winsock2example9.html
test.exe -p UDP -n ec2-50-19-202-144.compute-1.amazonaws.com -e 9930
http://www.tenouk.com/Winsock/Winsock2example9.html
test.exe -p UDP -n ec2-50-19-202-144.compute-1.amazonaws.com -e 9930
Edited by polyfrag, 02 July 2012 - 06:38 PM.
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#8 Members - Reputation: 675
Posted 02 July 2012 - 06:49 PM
Even netcat for windows doesn't work when I do the same command:
nc.exe -u ec2-50-19-202-144.compute-1.amazonaws.com 9930
http://joncraton.org...cat-for-windows
nc.exe -u ec2-50-19-202-144.compute-1.amazonaws.com 9930
http://joncraton.org...cat-for-windows
Edited by polyfrag, 02 July 2012 - 06:49 PM.
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#9 Moderators - Reputation: 3292
Posted 02 July 2012 - 07:18 PM
What does wireshark say on the machine you run "nc.exe" on?
Are you sure the Amazon provisioning is set up to allow UDP in on the public IP? If it works with netcat on the server, but not with netcat on your client, then that's the most likely problem.
Could also be local firewalls on the client, on your router, or on the server itself.
Are you sure the Amazon provisioning is set up to allow UDP in on the public IP? If it works with netcat on the server, but not with netcat on your client, then that's the most likely problem.
Could also be local firewalls on the client, on your router, or on the server itself.
enum Bool { True, False, FileNotFound };
