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H4X0R46's avatar
H4X0R46
New Contributor
7 years ago
Solved

Slow internet speeds after installing Hamachi

I've been having this issue for so long now! For some reason, my internet is blazing fast until I install Hamachi. Certain website downloads are affected but others aren't. for instance, downloading ...
  • oyvindhauge's avatar
    oyvindhauge
    6 years ago

    Try this to check the status of Receive Window Auto-Tuning Level

    netsh interface tcp show global

    and if it is disabled, turn it on with

    netsh interface tcp set global autotuninglevel=normal

    This helped me and two mates. The settings need to be run with admin rights cmd  (and shift+ctrl when you run it).

    As far as we understand it you would most likely want Receive-Side Scaling State enabled as well.

    netsh interface tcp set global rss=enabled

    We have not tested Hamachi after changing these settings. Nevertheless, just wanted to share because this problem was making us crazy.

jandafields's avatar
jandafields
Visitor
6 years ago

This seems to be a bug (or feature?) that other people, including myself, have had.  My Internet speed before installing is 200.  After installing is 50.  After UNINSTALLING is still 50.  You have to manually un-do the changes made to your computer that Hamachi made.

 

Here is the solution:

https://community.logmein.com/t5/LogMeIn-Hamachi-Discussions/Installing-Hamachi-slows-my-internet-speed/m-p/217907#M18346

 

This solution works for me.  Internet went back to 200 after doing this.

 

I REALLY wish that LogMeIn support would chime in officially regarding this.  I have not contacted them myself, but someone else in that thread did, and they reported that support would not acknowledge it.

 

AshC's avatar
AshC
Retired GoTo Contributor
6 years ago

Hi everyone,

I apologize for the delays, and expect the next version to have native API calls instead of netsh background configurations.  Until that time (as mentioned previously), you can run the following commands to resolve:

netsh int tcp set global autotuninglevel=normal
+
netsh int tcp set global rss=enabled

  • orlandson's avatar
    orlandson
    New Contributor
    5 years ago

    The solution works great and my download speed is back to normal, BUT I still have the same problem with my UPLOAD SPEED. Any news about how to fix UPLOAD SPEED too?

  • xPriority's avatar
    xPriority
    Visitor
    5 years ago

    I worked for me too, thanks a lot but the upload speed got cut in about half after I applied the netsh commands. If there is a fix for this asw please tell us, if not i guess we`ll just have to wait for the next update.

    Thanks 🙂

  • eVotheSnake's avatar
    eVotheSnake
    Active Contributor
    6 years ago

    But my Upload is still slow since i installed Hamachi, what can fix this?

  • orlandson's avatar
    orlandson
    New Contributor
    6 years ago
    Hi everyone,

    The solution works great for me and my download speed is back to normal, BUT I still have the same problem with my UPLOAD SPEED. Same as occurred with download speed after installing Hamachi the upload speed is down to half of normal speed.
    I think there be similar CMD netsh commands to restore upload speed. Can you help me with this?