similar to: enable none cipher

The HPN12 patch available from http://www.psc.edu/networking/projects/hpn-ssh addresses performance issues with bulk data transfer over high bandwidth delay paths. By adjusting internal flow control buffers to better fit the outstanding data capacity of the path significant improvements in bulk data throughput performance are achieved. In other words, transfers over the internet are a lot

The results, for anyone interested, can be found here http://www.psc.edu/networking/projects/hpn-ssh/results.html Long story short, there doesn't seem to be any notable difference between the two anymore. I still have a few more test combinations to run (<.5ms rtts and against cygwin) so the conclusions might change but, at this point, I'm no longer seeing any sort of performance

Hello, I know that this has been asked before, just wanted to mention that I, too, would like to see the HPN SSH functionality incorporated in the standard OpenSSH. Would there be technical disadvantages integrating the changes? I know we are all pretty busy, but I would certainly spend time to help, e.g. with testing, documentation, etc. Cheers --pwo -- Peter W. Osel - http://pwo.de/ - pwo

I hope this is the right list, as I'm desiring a feature addition in openssh. I would like the option to have a 'null' cipher (after the initial authorization, similar to 'delayed' for compression). It would have to be enabled on both client and server and server would never use it unless it was both enabled and asked for by the client. I'd strongly prefer it be able to

Hi, I tried different encryptions like arc four, but always with the same result. BTW: googling shows some similar questions and they are stuck on set same speed +-. But non of that solutions helped me. /G?tz > Am 11.08.2015 um 12:14 schrieb Eero Volotinen <eero.volotinen at iki.fi>: > > Usually problem in encryption. > > try cipher arcfour or apply hpn patches to

Hi, i have two servers, connected to to the lan by 10Gb with 10Gb and DAS hardware raid. Each system con read and write locally or to the 10G iscsi by more than 200 MB/s. Now I have to transfer backups form A to B and doing this with rsync always stuck at +- 48-50MB/s no matter which options, compressions, encryption etc I use. Even the plain default rsync is at that 50 Mb limit. coyp by scp

Hello list, right now SSH Tunnel / scp is reaches just around 76Mb/s on my E5 Xeon using AES-NI but openssl reaches around 600-700Mb/s using 128aes-cbc cipher. As far as i understand http://www.psc.edu/index.php/hpn-ssh this is due to very small buffers in ssh / scp. Is there any work on this? Like autotuning the buffer size? Are there plans to integrate the hpn patches? Greets, Stefan

http://www.psc.edu/networking/projects/hpn-ssh/ Mike Stevens and I just released a new set of high performance networking patches for OpenSSH 3.9p1, 4.0p1, and 4.1p1. These patches will provide the same set of functionality across all 3 revisions. New functionality includes 1) HPN performance even without both sides of the connection being HPN enabled. As long as the bulk data flow is in the

Hello Are there plans to merge the hpn-ssh (http://www.psc.edu/networking/projects/hpn-ssh/) and the LPK (http://code.google.com/p/openssh-lpk/) into the mainline openssh. Adding lpk has been logged as a bug in bugzilla as They are two patches that I always apply as the performance boost from hpn-ssh is substantial to say the least, and centralisation of the authorized_keys into a LDAP server

Hi, http://www.psc.edu/networking/projects/hpn-ssh/ Clearly, the HPN patches significantly boost throughput performance. This enhancement is entirely from tuning the SSH buffer sizes. Alex Tavcar

https://www.psc.edu/networking/projects/hpn-ssh/hpn-v-ssh-tput.jpg "SCP and the underlying SSH2 protocol implementation in OpenSSH is network performance limited by statically defined internal flow control buffers. These buffers often end up acting as a bottleneck for network throughput of SCP, especially on long and high bandwith network links. Modifying the ssh code to allow the buffers

Howdy, As a note, we now have HPN patch for OpenSSH 4.2 at http://www.psc.edu/networking/projects/hpn-ssh/ Its still part of the last set of patches (HPN11) so there aren't any additional changes in the code. It patches, configures, compiles, and passes make tests without a problem. I've not done extensive testing for this version of openssh but I don't foresee any problems. I

We've released a new HPN (High Performance Network) patch for OpenSSH 3.9p1. We've made two major changes - first off we backed out of all the modifications we made to buffer.c. Turns out that it just wasn't necessary once we fixed a nagging bug in channels.c. I also made a minor change to the buffer sizes in the source and sink functions in scp.c Increasing the size of both

Dear CentOS lovers, Could you consider to include a patch, http://www.psc.edu/networking/projects/hpn-ssh/ for openssh maybe as CentosPlus packages? It has great speed impact for long-distance ( high delay ) transfer. Regards, Yuji Tsuchimoto

[NB: General information regarding HPN-SSH can be found at http://www.psc.edu/networking/projects/hpn-ssh ] This is a beta release of HPN12 but I'd like to get some user experiences with it if anyone is so inclined. This version of the HPN patch more closely conforms to the openssh nomenclature and coding style, it eliminates the use of command line switches in favor of -o options, it

There have been many cases where I have found myself in need of a pure forwarding tool that can forward sockets over a single stream. In my use cases, this stream is already secure, so there is no need for the tool to do any encryption or authentication. One specific use-case was forwarding a Docker socket to another VM over QubesOS qrexec qrexec, which uses Xen shared memory, but there are

Hi, We are deciding on to either entirely use HPH code to our OpenSSH or not for systems globally and I come down to a question. If HPH-SSH code is such an improvement to network performance for OpenSSH, then why has it not been incorporated to the OpenSSH code? Is there a reason? Is it because there are problems with the HPH-SSH code? Since the code has been out for a time and still has not

We see absolutely dismal performance from Canberra to Perth via Aarnet or Grangenet (gig connections across the country). With standard rsync on a tuned tcp stack, we see about 700k/s. I started playing with the --sockopts and have increased the performance to 1.4M/s which is better, but still way off the pace. There are similar patches for ssh at

>From what I can gather from googling, using rsync over ssh without a cipher is not possible since some changes to the openssh package. ?Is this true? ?I have been using a CPU friendly cipher but feel that it is best to use no cipher at all (secured network). rsync -avxu --progress -e 'ssh -c arcfour128' /path/to/source/ user at server:/path/to/destination/ Thanks in advance!

Hi everyone, has anybody successfully integrated the patches from http://www.psc.edu/networking/projects/hpn-ssh/ into openssh, and maybe produced a .spec file for this purpose that s/he is willing to share? thx, Kay