search for: 20mbits

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...

...butes data from the Sloane Digital Sky Survey (SDSS) using rsync. (cf. www.sdss.org, and http://www.sdss.org/dr4/access/index.html for the rsync reference). Renater was using rsync to pull large amounts of data from FermiLab across a fast, long link, and was getting poor throughput (~20mbits/sec). The core issues turned out to be 1. Too-small TCP send-buffer on the FermiLab server side (which Dan Y. repaired via rsyncd.conf, and which was later assisted by installing a recent Linux that allowed send-buffer-autotuning), *and* 2. Too-small TCP receive-buffer on the cli...

Hello, I''m being confrunted with the following situation and I''m trying to find the simplest solution possible as to also be easier to manage. 1) I have: ISP1 ------ S1 (linux) S1''s got: 512kbits external bandwidth from ISP1 20Mbits MAN bandwidth not including ISP2 17Mbit tunnel connection which provider : 1 Mbit external bandwidth and 16Mbit MAN bandwidth with ISP2 HTB and IMQ are placed on S1. 2) I want to be able to guarantee a piece of bandwith for each user (like 128kbits MAN without ISP2 + 128kbits external bandwidth...