563 - Boats + survivalfly

>>>What is the problem? What do you expect to see instead?<<<
Boats are giving false positives with survival fly. Players are kicked for flying..

>>>Can it be reproduced systematically and if so: How?<<<
Take a boat and rip it dawg!

>>>Which version of NC+ are you running? (Check with /version NoCheatPlus or /ncp version on your server)<<<

>>>What's your NoCheatPlus configuration file version? (config.yml copy the first line in here)<<<
# Configuration generated by NoCheatPlus 3.9.3-DEV-b530.

>>>Did you change anything in your NC+ configuration file? If yes: What did you change?<<<
strict: false
>>>On which Craftbukkit/Craftbukkit++/Spigot build do you run your server on? (Simple execute /version)<<<

>>>How easy is it to reproduce? Does it always happen? Does it happen to all players? Does it happen with vanilla clients?<<<
Boats give false positives survival fly and kick players

>>>Do you run any other special plugin next to NC+ (Spout, mcmmo, heroes and others)?<<<
mcMMO with cncp

>>>Please provide any additional information below (logs, screenshots, plugin list, player amount, .....)?<<<
 (Use or and add the link here if linked resources are longer than a few lines.)<<<

Add a config option to exempt certain blocks from being checked by NoCheatPlus

User When Change
asofold Mar 28, 2015 at 19:12 UTC Changed priority from High to Medium
asofold May 24, 2014 at 09:51 UTC Changed status from Waiting to Replied
MyPictures Jan 26, 2014 at 01:10 UTC Changed status from New to Waiting
asofold Jul 14, 2013 at 12:21 UTC Changed name from Add config option for boats to prevent false positives with survival fly VLs to Boats + survivalfly

Changed priority from Medium to High
zSwayz Jun 10, 2013 at 20:09 UTC Create

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  • Avatar of asofold asofold Mar 28, 2015 at 19:12 UTC - 0 likes

    Setting to medium priority, because it seens to be rare and we can't track it down, in addition a few things have been changed internally since then.


    Latest beta release (+ 1.8.3, approved) NoCheatPlus 3.12.0-RC-sASO-b813
    (Development builds, 1.8: Jenkins)

  • Avatar of asofold asofold Aug 26, 2014 at 09:05 UTC - 0 likes

    Not sure .... we might use the moving trace to try to get more leniency here, but players can still fake moves while in vehicles i fear, so it stays an itchy topic.

  • Avatar of asofold asofold May 24, 2014 at 09:51 UTC - 0 likes

    We might try to abuse the moving trace for the player to track past positions even when on a boat, so i'll keep this in mind.

  • Avatar of asofold asofold Sep 26, 2013 at 07:36 UTC - 0 likes

    @Vivi_Coral: Go

    I think the third cancel is the part with the kick command, so that makes sense :9.

  • Avatar of Vivi_Coral Vivi_Coral Sep 25, 2013 at 17:28 UTC - 0 likes

    Ah I see :) I increased the Violation Level for the third cancel.

    No problem :)

  • Avatar of asofold asofold Sep 23, 2013 at 12:48 UTC - 0 likes

    @Vivi_Coral: Go

    "Violation level"

    Did you increase the violation level for the kick command or for the first cancel action?

    I set the kick to level 10000, because we have some players getting problems after login.

    In-game commands to alter the config are somewhere on the lists. Can't promise they will make it into ncp or any near-future version though. MC 1.7 will change a lot and we might well put all such into one of the next major versions (could become official NoCheat 4 then) - still can't promise anything on timing.

  • Avatar of Vivi_Coral Vivi_Coral Sep 23, 2013 at 09:19 UTC - 0 likes

    I just decided to up the VL (Velocity Level?) over what they were exceeding which has fixed the problem with a work around.

    Might it be worth adding a few commands to alter values in the NCP config, e.g:

    /ncp setvl 2000

  • Avatar of Vivi_Coral Vivi_Coral Sep 18, 2013 at 11:09 UTC - 0 likes

    I have now updated to the latest version of NCP.

    The issues I have been reporting are all the same, when travelling at full speed in a boat and the user turns, they get kicked.

  • Avatar of asofold asofold Sep 15, 2013 at 14:35 UTC - 0 likes

    I highly recommend updating to the latest release of NCP for the case you are running MC 1.6.2. Not necessarily related to boats (i don't think that the changes affect this, or was the last report related to destroying the boat?).

    What you might do is put the kick to something like vl 10000 instead of 1000.

    It stresses the server more on violations but some are still just false positives (boats + special situations with login), while the dumb clients get caught anyway, and the smart clients produce small violations anyway :) - the current implementation of the vl concept doesn't really match the reality of adaptive hack-clients for survivalfly.

    Last edited Sep 15, 2013 by asofold
  • Avatar of Vivi_Coral Vivi_Coral Sep 14, 2013 at 21:35 UTC - 0 likes

    Not updated to newest version yet but don't know if any of the fixes are related to this issue anyway, let me know if they are :)

    Got my usual player to test again. Latest example of the issue happening today:

    AcidDaze failed SurvivalFly: tried to move from -206.97, 62.42, -65.75 to -180.98, 62.37, -64.92 over a distance of 26.00 block(s). VL 2398.
    22:01:36 CONSOLE: AcidDaze has left.
    22:01:36 CONSOLE: [INFO] AcidDaze lost connection: user was kicked.
    22:01:36 CONSOLE: [INFO] eAcidDaze left the game.
    22:01:36 NoCheatPlus: (CONSOLE) Kicked AcidDaze : Kicked for flying (or related)
    Last edited Sep 18, 2013 by Vivi_Coral


Last updated
Mar 28, 2015
Jun 10, 2013
Replied - Someone has replied after waiting for more information.
Enhancement - A change which is intended to better the project in some way
Medium - Normal priority.

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