Search
Notices
Indoor & Stationary Cycling Forum From spin to Zwift to Peloton, this forum is dedicated to any and all indoor training on stationary bikes

Man in the middle box?

Thread Tools
 
Search this Thread
 
Old 04-10-22, 02:30 PM
  #1  
DonnyZ
Newbie
Thread Starter
 
Join Date: Apr 2022
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Man in the middle box?

Does anyone know of someone who makes a man in the middle box to go between the USB port on the PC and your ANT+ stick? Thanks
DonnyZ is offline  
Old 04-10-22, 04:05 PM
  #2  
Polaris OBark
ignominious poltroon
 
Polaris OBark's Avatar
 
Join Date: Jan 2022
Posts: 4,004
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 2228 Post(s)
Liked 3,412 Times in 1,783 Posts
Something like this?

https://www.amazon.com/Adapter-PerfP.../dp/B079217ZGV
Polaris OBark is offline  
Old 04-10-22, 08:14 PM
  #3  
tempocyclist
Senior Member
 
tempocyclist's Avatar
 
Join Date: Jun 2021
Location: Australia
Posts: 823

Bikes: 2002 Trek 5200 (US POSTAL), 2020 Canyon Aeroad SL

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 313 Post(s)
Liked 679 Times in 327 Posts
Can't say I've heard that term before, but do you mean a USB extension cable perhaps? I picked up mine on eBay. A two or three metre cable should suffice.
tempocyclist is offline  
Old 04-11-22, 09:32 AM
  #4  
dmanthree
Senior Member
 
dmanthree's Avatar
 
Join Date: Sep 2014
Location: Northeastern MA, USA
Posts: 1,678

Bikes: Garmin/Tacx Bike Smart

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 646 Post(s)
Liked 289 Times in 191 Posts
I just use a USB extension cable to get the ANT+ antenna closer to the bike. Works fine.
dmanthree is offline  
Old 04-11-22, 03:42 PM
  #5  
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,386
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,687 Times in 2,510 Posts
"man in the middle box" implies some kind of processing to me.
unterhausen is offline  
Old 04-12-22, 08:59 AM
  #6  
dmanthree
Senior Member
 
dmanthree's Avatar
 
Join Date: Sep 2014
Location: Northeastern MA, USA
Posts: 1,678

Bikes: Garmin/Tacx Bike Smart

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 646 Post(s)
Liked 289 Times in 191 Posts
Originally Posted by unterhausen
"man in the middle box" implies some kind of processing to me.
It does, but it also sounds like the OP just wants to move the ANT+ antenna. maybe the OP can clarify?
dmanthree is offline  
Old 04-12-22, 11:44 AM
  #7  
Barry2 
LR÷P=HR
 
Join Date: Sep 2019
Location: SF Bay Area
Posts: 2,161

Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 Cervelo R3 & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-)

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 862 Post(s)
Liked 1,195 Times in 687 Posts
Main in Middle

"Man in the Middle" usually refers to a hack/attack involving reprocessing or accessing data before passing it along to it's intended designation.
Often used to break encryption in order to recover data you're not supposed to have access to, or cheat when playing a game.

I can't believe the OP is attempting to alter Zwift data, so I must have gone off on the wrong tangent.

Barry
Barry2 is offline  
Likes For Barry2:
Old 04-12-22, 01:54 PM
  #8  
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,386
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,687 Times in 2,510 Posts
It does probably imply a nefarious purpose. You don't really need a box to sniff trainer data, just some kind of sniffer.
Not sure if you can do it internal to the pc with wireshark.
unterhausen is offline  
Old 04-12-22, 02:06 PM
  #9  
Barry2 
LR÷P=HR
 
Join Date: Sep 2019
Location: SF Bay Area
Posts: 2,161

Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 Cervelo R3 & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-)

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 862 Post(s)
Liked 1,195 Times in 687 Posts
WireShark

WireShark reads data, but won't edit/modify on the fly.

Barry

BTW - that was DonnyZ first post... You don't suppose we're gonna get ghosted do you !!!!!
Despite 8 replies, public profile shows nothing in the last two days.

Last edited by Barry2; 04-12-22 at 02:13 PM.
Barry2 is offline  
Likes For Barry2:
Old 04-12-22, 05:59 PM
  #10  
spelger
Senior Member
 
spelger's Avatar
 
Join Date: Jul 2015
Location: reno, nv
Posts: 2,298

Bikes: yes, i have one

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 1136 Post(s)
Liked 1,179 Times in 686 Posts
Someone at work asked me to make something like this. He claimed that he had a hard time zwifting with a 1x mtn bike and needed to alter the resistance. Pretty easy to do really. Sounded like cheating to me though.
spelger is offline  
Old 04-12-22, 08:17 PM
  #11  
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,386
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,687 Times in 2,510 Posts
How would you do it? Second computer or all in the main computer?
unterhausen is offline  
Old 04-13-22, 07:27 AM
  #12  
spelger
Senior Member
 
spelger's Avatar
 
Join Date: Jul 2015
Location: reno, nv
Posts: 2,298

Bikes: yes, i have one

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 1136 Post(s)
Liked 1,179 Times in 686 Posts
i'm so tempted to answer this in detail but really don't want to put any ideas in anyone's head. it can be done on a single computer.
spelger is offline  
Old 04-13-22, 07:54 AM
  #13  
Barry2 
LR÷P=HR
 
Join Date: Sep 2019
Location: SF Bay Area
Posts: 2,161

Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 Cervelo R3 & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-)

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 862 Post(s)
Liked 1,195 Times in 687 Posts
Barry2 is offline  
Old 04-14-22, 11:34 AM
  #14  
blacknbluebikes 
Senior Member
 
blacknbluebikes's Avatar
 
Join Date: Jul 2013
Location: NJ, USA
Posts: 1,278

Bikes: two blacks, a blue and a white.

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 444 Post(s)
Liked 844 Times in 408 Posts
Spill it, Spelger... or we'll dox your strava numbers all over instagram!
blacknbluebikes is offline  
Old 04-18-22, 03:57 PM
  #15  
PeteHski
Senior Member
 
PeteHski's Avatar
 
Join Date: May 2021
Posts: 8,381
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 4387 Post(s)
Liked 4,828 Times in 2,984 Posts
Originally Posted by spelger
Someone at work asked me to make something like this. He claimed that he had a hard time zwifting with a 1x mtn bike and needed to alter the resistance. Pretty easy to do really. Sounded like cheating to me though.
All he needed to do was put in a lower rider weight in Zwift.
PeteHski is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.