On 09/20/2016 04:03 PM, Robert Heller wrote: > I have a server that is also a firewall router at a public library with > a fiber optic Internet connection. It is running kernel > 2.6.32-642.4.2.el6.x86_64 (current CentOS 6.8) and Iptables 1.4.7 > (current stock CentOS 6.8). I having trouble with Internet throughput. I > am supposed to be getting 20Mbits down and 20MBits up, but I am not > getting that. It has no problem doing 20MBits down, but for uploads of > *large* files (using different protocols, such as ssh or http), the > upload starts at 20MBits, but over time quickly slows down to about > 3MBits. Speedtests claim I am getting about 20/20. I seem to be about to > get 3Mbits *per transfer*, even if the transfers are concurrent and MRTG > shows total throughput edging up to 6Mbits. > > What can possibly be going on. My ISP is not believing there is anything > wrong on their end. About the only thing left is maybe some sort of > weirdness with Iptables imposing some sort of I/O overhead, maybe related > to the MASQUERADE postrouting. Does this even make sense? > ==> as for your problem of slow down, i find that a lot of sites will throttle back, possible because they have their system set up to do so. i found that many speed test sites use a poor way of testing speed and do not really test. searched for better tester and so far have had good results using; http://speedof.me/ have a look at; http://speedof.me/howitworks.html for explanation of testing process and you will see why it is better. -- peace out. CentOS GNU/Linux 6.8 tc,hago. g . =+= Tired of having your microsoft os hacked? Change to Linux os, used by microsoft hackers. =+= in a world with out fences, who needs gates. =+=