0
votes
1answer
49 views

Simulate tcp window full on ubuntu

I have 2 ubuntu boxes. In between them is a firewall. I am trying to simulate tcp window full condition or in other words, I want the ubuntu server to send a tcp window full flag to client. Here are ...
0
votes
1answer
370 views

Ubuntu openVPN TCP no internet, UDP works. Win7 works on both TCP/UDP with same settings

I've recently purchased a VPN service which I'm connecting to with openVPN. On Windows 7 I can connect on both UDP and TCP settings, but when I'm trying the same thing on Ubuntu 13.04, it gives me ...
1
vote
0answers
133 views

Load TCP New Reno protocol

I am doing some test of the congestion control protocols and I cannot find how to load the protocol New Reno. I loaded a lot of protocols like Reno, Vegas, Hybla, Bic, Cubic, etc using the sysctl ...
0
votes
1answer
196 views

Disable tcp slow start

I am looking for disable tcp slow start mechanism for high-speed network. Currently clients send 100MB flows to random servers with non-blocking 1Gbps link. In my math, the completion time of the ...
2
votes
0answers
386 views

MySQL crashes when connecting from localhost with tcp (UNIX sockets work)

I have Ubuntu 12.04 running MySQL server 5.5.24. I can connect with mysql --user root -p. status shows me : ... Connection: Localhost via UNIX socket ... When I try to connect with mysql --host ...
1
vote
1answer
587 views

Connection stays alive but endpoint is dead?

Does anyone have an idea what would cause a TCP connection (client side) to stay in the ESTABLISHED state for about 24 hours, even though the server was restarted? The client process stays on the ...
1
vote
0answers
676 views

Iptables port redirecting. Rule doesn't work or show up in iptabels

I'm trying to redirect some incoming TCP traffic on port 443 to port 999 with iptables in an Ubuntu VM. I am using sudo iptables -t nat -A PREROUTING -p tcp --destination-port 443 -j REDIRECT ...
2
votes
1answer
122 views

TCP behavior on Mac OS vs Ubuntu

The following process results in different behavior in Mac OS and Ubutu: cat some_text_file | xargs a_shell_script.sh a_shell_script.sh #!/bin/bash echo "$@" | telnet 127.0.0.1 123 exit 0 The TCP ...