Re: [Iperf-users] iperf3 Security Advisory ESNET-SECADV-2023-0002 (Revised)

Thanks a lot, Bruce. On Fri, Sep 15, 2023 at 10:32 PM Bruce A. Mah wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA512 > > ESnet Software Security Advisory > ESNET-SECADV-2023-0002 > > Topic: iperf3 Server Denial of Service > Issued: 13 September 2023 > Re

Re: [Iperf-users] iperf3, CVE-2023-38403

Apologies for the late response, but iperf-3.14 and later addresses that issue (iperf-3.15 is current as of this writing). Bruce. If memory serves me right, David Krale wrote: > Data Classification: Internal > > Hello Iperf, > > Is there is a version of iperf3 that addresses the vulnerability

[Iperf-users] iperf3 Security Advisory ESNET-SECADV-2023-0002 (Revised)

-BEGIN PGP SIGNED MESSAGE- Hash: SHA512 ESnet Software Security Advisory ESNET-SECADV-2023-0002 Topic: iperf3 Server Denial of Service Issued: 13 September 2023 Revised:15 September 2023 Credits:Jorge Sancho Larraz (Canonica

[Iperf-users] iperf3 Security Advisory ESNET-SECADV-2023-0002

-BEGIN PGP SIGNED MESSAGE- Hash: SHA512 ESnet Software Security Advisory ESNET-SECADV-2023-0002 Topic: iperf3 Server Denial of Service Issued: 13 September 2023 Credits:Jorge Sancho Larraz (Canonical) Affects:iperf-3.14 and

[Iperf-users] iperf3, CVE-2023-38403

Data Classification: Internal Hello Iperf, Is there is a version of iperf3 that addresses the vulnerability CVE-2023-38403 ? Thanks you ! Dave Krale IT-Cloud Ops-Network Infrastructure Services 707.685.1677 ~~ This e-mail message

Re: [Iperf-users] iperf3 - Server timout?

I can't speak for iperf 3 but iperf 2 supports -t on the server side. Though I'm not sure if this is what you're wanting as -t will kill the server/listener process and you'll still need to restart it. Bob On Mon, Jul 5, 2021 at 9:02 AM Neil Yeoman wrote

[Iperf-users] iperf3 - Server timout?

Hi, I am running Iperf3 (3.7) on a PC (Linux Mint) as the server, with the client on a development board (Linux). The client connects via LTE (4G), running a 5 second test every 30 seconds. I am Logging GPS location against the cellular parameters and the reported Iperf3 throughput measurements

Re: [Iperf-users] iperf3: error

Hi, could be a firewall or an access control list between the iperf client and the server, not allowing such connection? Sandro Il gio 22 apr 2021, 13:26 girish chaudhari ha scritto: > Hi Team, > > Can you please help me to resolve the below error while executing the > command. > > iperf3 -i 60

[Iperf-users] iperf3: error

Hi Team, Can you please help me to resolve the below error while executing the command. iperf3 -i 60 -t 1800 -c server [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-60.00 sec 36.2 MBytes 5.06 Mbits/sec0 67.0 KBytes [ 4] 60.00-120.00 sec 33.5 MBytes 4

Re: [Iperf-users] iperf3 not working with sdn switches

It's very difficult to debug this with such limited information Iperf 3 does have a TCP connection before a UDP test. Iperf 2 doesn't. That's one possibility for a UDP test issue, i.e. something is prevented the initial TCP exchange. Bob On Fri, Sep 13, 2019 at 1:15 AM ha Fa wrote: > why iperf

[Iperf-users] iperf3 not working with sdn switches

why iperf works with sdn switch, while iperf3 not working, its hangs, am using udp protocol thanks ___ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users

Re: [Iperf-users] Iperf3 win32 build

If memory serves me right, Richard Pasztor wrote: > Bruce, > thanks for your reply. > > Is there any place I can find a recent win32 build? I don't have the > skills and tools to build myself. None that I'm aware of, unfortunately. Maybe someone reading this can make one available for you? Bruc

Re: [Iperf-users] Iperf3 win32 build

Bruce, thanks for your reply. Is there any place I can find a recent win32 build? I don't have the skills and tools to build myself. Richard On Tue, Sep 11, 2018 at 9:52 PM, Bruce A. Mah wrote: > If memory serves me right, Richard Pasztor wrote: > > > is there any official build of any recent

Re: [Iperf-users] Iperf3 win32 build

If memory serves me right, Richard Pasztor wrote: > is there any official build of any recent iperf3 for win32 platform > (32/64bit ) I can download? > > https://iperf.fr/iperf-download.php#windows > --> only a 2yr old build (v3.1.3 from 2016 june) is offered, and they > seem to be the only offic

[Iperf-users] Iperf3 win32 build

Dear all, is there any official build of any recent iperf3 for win32 platform (32/64bit ) I can download? https://iperf.fr/iperf-download.php#windows --> only a 2yr old build (v3.1.3 from 2016 june) is offered, and they seem to be the only official mirror for win32 builds Regards, Richard __

Re: [Iperf-users] iperf3 UDP not working with iptables drop random?

Can you share the iperf 2.0.13a output? Bob On Fri, Aug 17, 2018 at 1:07 PM, Hector Azpurua wrote: > Hi guys, > > I'm performing some local test on my network with iperf3 using UDP > connections between 2 Ubuntu 18.04 hosts. But it seems that the UDP i

[Iperf-users] iperf3 UDP not working with iptables drop random?

Hi guys, I'm performing some local test on my network with iperf3 using UDP connections between 2 Ubuntu 18.04 hosts. But it seems that the UDP iperf3 connections it is not robust to support a random packet drop of 0.1? When executing the iperf3 tests, the server hangs (i need to restart the serve

Re: [Iperf-users] iperf3 query

If memory serves me right, Bob McMahon via Iperf-users wrote: > I cant' speak to iperf 3, but from an iperf 2 perspective this level of > "system testing" really isn't supported.  Tools from ixia > would be my suggestion. > > In general, it might be best to

Re: [Iperf-users] iperf3 query

I cant' speak to iperf 3, but from an iperf 2 perspective this level of "system testing" really isn't supported. Tools from ixia would be my suggestion. In general, it might be best to start with actionable effects, i.e what changes a test will effect. The

[Iperf-users] iperf3 query

Hi, I have requirement for below use cases. Performance test with different types of traffic packets like video traffic, ICMP, HTTP, HTTPS, FTP, UDP,TCP. Different packets with different packet sizes like 64, 128, 256 … 9000 (jumbo packets). I would like to know whether above use cases can be ac

[Iperf-users] iperf3 support, issues

Hi iperf3 users... I've been on vacation the past few weeks, during which a number of issues and pull requests got filed for iperf3. I'll be looking at these as a part of digging myself out from my backlog. Thanks for your patience... Bruce. signature.asc Description: OpenPGP digital signatu

Re: [Iperf-users] iperf3

If memory serves me right, Harsh Patel wrote: >   >  i want to know you have any API or SDK for iperf3 TCP UDP Testing . or > its free or paid please contact me  > i need to implement in my andorid project. so please help me iperf3 is open source and licensed with a BSD license. The whole thing i

[Iperf-users] iperf3

i want to know you have any API or SDK for iperf3 TCP UDP Testing . or its free or paid please contact me i need to implement in my andorid project. so please help me-- Check out the vibrant tech community on one of the

Re: [Iperf-users] iperf3: abrupt interval issue

If memory serves me right, Bob McMahon wrote: > The first sample shows 37.7Mb/s for iperf3 and 87.0 Mb/s for iperf2 > which is quite a big difference. That is a significant difference, indeed. However in the original email, the iperf3 throughput was 87.6 Mbps measured at the receiver. I'm puzzled

Re: [Iperf-users] iperf3: abrupt interval issue

If memory serves me right, Bob McMahon wrote: > Hi Nikita, > > I don't know the iperf3 code.  We've been maintaining iperf2 mostly per > WiFi testing needs.  Bruce's original response suggested internal timers > not firing on time. Sorry for the radio silence...yes I think this is still the case

Re: [Iperf-users] iperf3: abrupt interval issue

Hi Nikita, I don't know the iperf3 code. We've been maintaining iperf2 mostly per WiFi testing needs. Bruce's original response suggested internal timers not firing on time. Bob On Tue, May 8, 2018 at 12:26 AM, Nikita Gupta wrote: > Yes, iperf2 giving correct result. But can you explain why

Re: [Iperf-users] iperf3: abrupt interval issue

Yes, iperf2 giving correct result. But can you explain why *iperf3* is not showing data of 1 Sec but of 1.24 sec? On Tue, 8 May 2018 at 10:37 AM, Bob McMahon wrote: > iperf2 seems to be indicating 83 socket writes per second with no write > errors. The congestion window is 42K and the RTT is 3.

Re: [Iperf-users] iperf3: abrupt interval issue

iperf2 seems to be indicating 83 socket writes per second with no write errors. The congestion window is 42K and the RTT is 3.5 milliseconds. Nothing seems too unusual to me. Bob On Mon, May 7, 2018 at 8:05 PM, Nikita Gupta wrote: > Yeah Bob, > > Input command for iperf 2.0.10: > iperf -c -e

Re: [Iperf-users] iperf3: abrupt interval issue

Yeah Bob, Input command for iperf 2.0.10: iperf -c -e -i 1 -t 10 Output for iperf 2.0.10: [ 3] 0.00-1.00 sec 10.4 MBytes 87.0 Mbits/sec 83/0 0 42K/3464 us input for iperf3: iperf3 -c -i 1 -t 10 Output for iperf3: [ 5] 0.00-1.24 sec 5.60 MBytes 37.7 Mbits/sec0 38.2 KByt

Re: [Iperf-users] iperf3: abrupt interval issue

The client output for 2.0.10 with -e and -i 1 could provide useful information. Bob On Mon, May 7, 2018 at 1:32 AM, Nikita Gupta wrote: > Hi Bob, > > Working without issue: iperf-2.0.10 > Time interval issue: iperf-3.3, iperf-3.1, iperf-3.5, iperf-3.0 > > Regards, > Nikita > > On Sat, May 5, 2

Re: [Iperf-users] iperf3: abrupt interval issue

Hi Bob, Working without issue: iperf-2.0.10 Time interval issue: iperf-3.3, iperf-3.1, iperf-3.5, iperf-3.0 Regards, Nikita On Sat, May 5, 2018 at 3:37 AM, Bob McMahon wrote: > what version of iperf did you use? iperf -v should provide that. > > If it's a later version of iperf2 the output on

Re: [Iperf-users] iperf3: abrupt interval issue

what version of iperf did you use? iperf -v should provide that. If it's a later version of iperf2 the output on the client of with the -e option could be helpful. Bob On Thu, May 3, 2018 at 8:34 PM, Nikita Gupta wrote: > Hi Bruce thanks for giving time on this issue. > > I am working on an e

Re: [Iperf-users] iperf3: abrupt interval issue

Hi Bruce thanks for giving time on this issue. I am working on an embedded system with imx50. Server i'm using is RaspberryPi. Both the machines are connected on same network. Yes the system is a bit loaded. So this might be the reason. But if I reduce the window size then bandwidth also reduces

Re: [Iperf-users] iperf3: abrupt interval issue

If memory serves me right, Nikita Gupta wrote: > Hi team, > > While checking network performance using iperf3, I'm facing interval > issue at client end. Below are the logs: > > [  5]   0.00-1.05   sec  11.2 MBytes  88.7 Mbits/sec    0   42.4 > KBytes   > [  5]   1.05-2.01   sec  10.0 MBytes 

[Iperf-users] iperf3: abrupt interval issue

Hi team, While checking network performance using iperf3, I'm facing interval issue at client end. Below are the logs: [ 5] 0.00-1.05 sec 11.2 MBytes 88.7 Mbits/sec0 42.4 KBytes [ 5] 1.05-2.01 sec 10.0 MBytes 88.2 Mbits/sec0 42.4 KBytes [ 5] 2.01-3.07 sec 11.2 MByt

Re: [Iperf-users] iperf3 and 100Gb

In particular, check out: http://fasterdata.es.net/host-tuning/100g-tuning/ Your results are pretty typical. On Tue, Apr 17, 2018 at 14:16 Jeffrey Lane wrote: > On Tue, Apr 17, 2018 at 3:09 PM, Bruce A. Mah wrote: > > If memory serves me right, Jeffrey Lane wrote: > >> Hi all, > >> > >> I ha

Re: [Iperf-users] iperf3 and 100Gb

On Tue, Apr 17, 2018 at 3:09 PM, Bruce A. Mah wrote: > If memory serves me right, Jeffrey Lane wrote: >> Hi all, >> >> I have what is kind of a silly question, but who has some experience >> testing 100Gb with iperf3? >> >> I just wanted to validate something with iperf3 to see if it is reasonabl

Re: [Iperf-users] iperf3 and 100Gb

If memory serves me right, Jeffrey Lane wrote: > Hi all, > > I have what is kind of a silly question, but who has some experience > testing 100Gb with iperf3? > > I just wanted to validate something with iperf3 to see if it is reasonable. > > With a single process running, the most I've been ab

Re: [Iperf-users] iperf3 and 100Gb

Seems reasonable to me though I'm not an iperf3 expert. Bob PS. As a side note, with iperf2 which does support multiple traffic threads, you can get 4 threads using -P 4. On Tue, Apr 17, 2018 at 6:19 AM, Jeffrey Lane wrote: > Hi all, > > I have what

[Iperf-users] iperf3 and 100Gb

Hi all, I have what is kind of a silly question, but who has some experience testing 100Gb with iperf3? I just wanted to validate something with iperf3 to see if it is reasonable. With a single process running, the most I've been able to get out of a 100Gb network port is a burst of about 65Gb/

Re: [Iperf-users] Iperf3 - Througput showed on Output Report

iperf operates on network sockets and mostly operates at the transport layer. "The socket is primarily a concept used in the transport layer of the Internet model " https://en.wikipedia.org/wiki

[Iperf-users] Iperf3 - Througput showed on Output Report

Hello List, can anyone tell me or refer me to any place where I can find the layer in which the througput is measured with iPerf3? I know it is an App, but i want to have a confirmation. thanks! Lui -- Check out the vibr

Re: [Iperf-users] iperf3 simple test punch my network?

If memory serves me right, Periko Support wrote: > Running simple test in a 1Gb network, about 200 meters distance over fiber. > > side a iperf -s > side b iperf -c IP-side-A. > > between runs if I have a ping running between side A and side B, I lost > packets. > > This is normal or my networ

[Iperf-users] iperf3 update, June 2017

Subject: iperf3 status, June 2017 iperf 3.2 Release Plans --- We've done quite a bit of work the past few weeks getting the master branch in shape to cut a new release, which will be the first of the 3.2.x series. These changes include fixes for a number of long-standing bug

[Iperf-users] iperf3 simple test punch my network?

Hi. Running simple test in a 1Gb network, about 200 meters distance over fiber. side a iperf -s side b iperf -c IP-side-A. between runs if I have a ping running between side A and side B, I lost packets. This is normal or my network is really bad? thanks. note: both machines are windows boxes

Re: [Iperf-users] iperf3 --forceflush release

erry.hub> From: b...@es.net Sent: 24 May 2017 23:04 To: morne.joub...@u-blox.com; bob.mcma...@broadcom.com Cc: iperf-users@lists.sourceforge.net Subject: Re: [Iperf-users] iperf3 --forceflush release If memory serves me right, Morne Joubert wrote: > Hi > Thanks for the reply. >

Re: [Iperf-users] iperf3 --forceflush release

lackBerry Hub for Android > <http://play.google.com/store/apps/details?id=com.blackberry.hub> > *From:* bob.mcma...@broadcom.com > *Sent:* 24 May 2017 21:27 > *To:* b...@es.net > *Cc:* morne.joub...@u-blox.com; iperf-users@lists.sourceforge.net > *Subject:* Re: [Iperf-users]

Re: [Iperf-users] iperf3 --forceflush release

<http://play.google.com/store/apps/details?id=com.blackberry.hub> From: bob.mcma...@broadcom.com Sent: 24 May 2017 21:27 To: b...@es.net Cc: morne.joub...@u-blox.com; iperf-users@lists.sourceforge.net Subject: Re: [Iperf-users] iperf3 --forceflush release Also, just to follow up and by

Re: [Iperf-users] iperf3 --forceflush release

Also, just to follow up and by more clear, iperf2 uses fflush() after newlines in order to support line buffering over network pipes. This is particularly useful when iperf is running remotely over ssh and the timeliness o

Re: [Iperf-users] iperf3 --forceflush release

If memory serves me right, Bob McMahon wrote: > hmm, I didn't think iperf3 was supported on windows. Iperf2 flushes > lines and doesn't buffer so it works over pipes without this option. Technically we (ESnet) don't support it on Windows. There are some users in the community who have made it wo

Re: [Iperf-users] iperf3 --forceflush release

hmm, I didn't think iperf3 was supported on windows. Iperf2 flushes lines and doesn't buffer so it works over pipes without this option. Bob On Tue, May 23, 2017 at 3:30 PM, Morne Joubert wrote: > Hi, > > I was wondering when a new release for windows is going to be built with > the –forceflus

[Iperf-users] iperf3 --forceflush release

Hi, I was wondering when a new release for windows is going to be built with the -forceflush functionality ? If it is not going to be done any time soon, is there instructions on  how to build it on windows?   Regards, Morné Joubert ---

Re: [Iperf-users] Iperf3 + bandwidth for TCP

Also, for TCP, later version of iperf 2 supports -b on the client (transmitter) using a very simple token bucket . The token bucket depth is "unlimited" though. I'm considering two things, 1) Limiting the token bucket depth based on four times the -i

Re: [Iperf-users] Iperf3 + bandwidth for TCP

-b works for both TCP and UDP, but --fq-rate works much better for TCP on CentOS7/Debian8 based hosts, as it does kernel-level pacing, not user-level pacing. On Sat, May 13, 2017 at 7:54 PM, Arman Mohsin wrote: > Hi Brian, > > Hope all is well. Does the iperf3 -c -b option limit bandwidth for

[Iperf-users] iperf3 update, April 2017

This is the first of a series of (maybe periodic?) updates about iperf3 development: State of the iperf3 World, as seen from ESnet... iperf3 was originally written to be a "better", more maintainable follow-on to iperf2. This was seen to be necess

Re: [Iperf-users] iperf3 -d or Multiple Sessions

I haven't read the iperf 3 code much but it's primarily the multithreaded code in iperf 2 that makes it complicated. My thoughts are to keep the multithreading code in iperf 2 and keep iperf 3 single threaded. Then use higher level scripts, possibly python scripts, to get the similar functionali

Re: [Iperf-users] iperf3 -d or Multiple Sessions

If memory serves me right, McCutcheon, Will wrote: > Does the roadmap for iperf3 include support for -d or -r? So I think what you are really asking is whether iperf3 will support the bidirectional tests that iperf2 supports. The answer is that no it's not really on our roadmap at this point. It

Re: [Iperf-users] iperf3 -d or Multiple Sessions

I can't speak for the iperf 3 road map. For iperf 2.0.10 I'm actively looking to better leverage multiple cores per threads, e.g. -P. I think a modern CPU has up to 22 real cores. Curious to your needs. Bob On Tue, Jan 10, 2017 at 10:57 AM, McCutcheon, Will < william.mccutch...@williams.com> w

[Iperf-users] iperf3 -d or Multiple Sessions

Does the roadmap for iperf3 include support for -d or -r? --Will [cid:573B7501-B7E5-4835-9388-36228E80A76E]Will McCutcheon | Williams | Senior RF Engineer | Network Analyst - IV, IM Central - Telecom Office: 405-727-1365 | Cell: 405-318-1499 | Mailing Address: 525 Cent

Re: [Iperf-users] Iperf3 (3.1.3) optional argument -w

If memory serves me right, Sandro Bureca wrote: > could you please explain the meaning of the optional argument *-w* > when iperf3 is used to measure bandwidth with *udp *packets. > > I assumed it was used for *TCP-window* parameters but I found on some > iperf3 help that it is used for dimension

Re: [Iperf-users] Iperf3 (3.1.3) optional argument -w

Hi Bruce, thank you very much for your help. Regards Sandro Il 23/Nov/2016 18:12, "Bruce A. Mah" ha scritto: > If memory serves me right, Sandro Bureca wrote: > > > could you please explain the meaning of the optional argument *-w* > > when iperf3 is used to measure bandwidth with *udp *packets.

[Iperf-users] Iperf3 (3.1.3) optional argument -w

Dear all, Bob, could you please explain the meaning of the optional argument *-w* when iperf3 is used to measure bandwidth with *udp *packets. I assumed it was used for *TCP-window* parameters but I found on some iperf3 help that it is used for dimensioning the *buffer*. It is not very clear to me

[Iperf-users] Iperf3 UDP test stop working after a while

Hi iperf users I am running some UDP test from tow PC connected behind NAT How you can see after a while the UDP server (-R option is used) stops to send UDP traffic Can anyone help me to find the reason? C:\Users\gdelgran>iperf3 -c 192.168.98.206 -t 360 -R --get-server-output -l 1200 -u Connect

Re: [Iperf-users] iperf3 vs iperf2 on 40Gbit

On Fri, Jun 3, 2016 at 12:47 PM, Bob McMahon wrote: > Out of curiosity, is there any threading regardless of the -P? > Nope, just 1 thread. > Iperf 2 create threads for traffic (client/server), the reporter and the > listener. I think that helps some even for a single traffic flow, i.e. > mul

Re: [Iperf-users] iperf3 vs iperf2 on 40Gbit

Out of curiosity, is there any threading regardless of the -P? Iperf 2 create threads for traffic (client/server), the reporter and the listener. I think that helps some even for a single traffic flow, i.e. multiple clients suggested. (Also note: I tried assigning threads to cores using cpu affin

Re: [Iperf-users] iperf3 vs iperf2 on 40Gbit

The reason for this performance differences is that iperf3 is single threaded, so all parallel streams will use a single core. At 40G you will be core limited To test 40G with iperf3, I do the following: Start 3 servers: iperf3 -s -p 5101 iperf3 -s -p 5102 iperf3 -s -p 5103 and then run 3 client

Re: [Iperf-users] iperf3 vs iperf2 on 40Gbit

Which version of iperf 2 are you running? We did some work in 2.0.8_+ for UDP throughput including using realtime clocks (vs. gettime of day) as well as support realtime scheduling of the traffic threads. Also increased shared memory significantly between traffic threads and the reporter thread t

[Iperf-users] iperf3 vs iperf2 on 40Gbit

I am running into a problem where there is a remarkable difference in reported throughput when using iperf2 vs iperf3. With iperf2, and about 16 - 20 threads, I can get, reliably, between 32 and 35 Gb/s on a 40Gb segment. with iperf3 on exactly the same hardware, I only get 4Gb/s, sometimes I can

[Iperf-users] iperf3 development status

Beginning with the release of iperf 3.1, ESnet plans to support iperf3 in "maintenance mode". At this point, we have no definite plans for further iperf3 releases, and ESnet will be providing a very limited amount of resources for support and development, going forward. However, ESnet could issue

Re: [Iperf-users] iperf3-3.0.2 is available

Addendum: Due to a mistake in the release process for iperf3-3.0.2, the tarball that I announced previously is actually not compressed, despite having a "tar.gz" file extension. While confusing, the contents of the uncompressed tarball are correct, as is the file checksum. The file URL and SHA25

[Iperf-users] iperf3-3.0.2 is available

SPECIAL NOTE: The iperf3 project, including the source code repository, issue tracker, and wiki, has been moved to GitHub. ESnet (Energy Sciences Network) is proud to announce the public release of iperf3 3.0.2. This version is a maintenance release that fixes a number of bugs, many reported by u

[Iperf-users] iperf3-3.0.1 is available

ESnet (Energy Sciences Network) is proud to announce the public release of iperf3 3.0.1. iperf3 3.0.1 is the latest version of the iperf network measurement utility. Originally developed by NLANR/DAST, iperf is a tool for measuring the maximum TCP and UDP performance along a path, allowing for th