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OpenVPN disable compression MR600 v3

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OpenVPN disable compression MR600 v3

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OpenVPN disable compression MR600 v3
OpenVPN disable compression MR600 v3
2023-01-09 12:41:23 - last edited 2023-01-10 08:04:23
Model: Archer MR600  
Hardware Version: V3
Firmware Version: latest

Model: Archer MR600 V3

Hardware Version: V3

Firmware Version: Latest

 

Hi, I have just bought a dozen pieces MR600 for my business. After configure i download and install OpenVPN 2.6 beta from 28 December 2022 r. I noticed that OpenVPN is not working. Connects correctly (green icon) but no communication with LAN (ping and rdp not working). After a long search i found that the compression option is to blame. In future OpenVPN 2.6 compression will be disable by default and MR600 have default compression enabled in OpenVPN server.

We can`t change this settings :/ from GUI. For now to work my OpenVPN server i'm back to OpenVPN 2.5.8 and connect with comp-lzo adaptive in client config and now everything works but in future release when i update OpenVPN client to final 2.6 version it will stop working again so please in next firmware update remove compression from OpenVPN server or add in GUI options for users do enable/disable compression. In the future, the problem will affect not only me.

 

I also read that compression is a security risk and which is why OpenVPN team disable this option in future release.
 

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#1
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6 Reply
Re:OpenVPN disable compression MR600 v3
2023-01-12 09:53:16

  @joksik 

 

Hi, thank you very much for the feedback.

 

May I know the firmware version of your MR600 V3? We will report this issue to senior engineers and run some tests to confirm it.

If the problem indeed exists, we will fix it in future firmware update.

 

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#2
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Re:OpenVPN disable compression MR600 v3
2023-01-12 11:03:53

  @Sunshine 

sure here is information that you want:

 

Firmware Version:‪1.0.0 0.9.1 v0001.0 Build 220307 Rel.60743n Hardware Version:‪Archer MR600 v3 00000001 IMEI:866501047312251

 

in check firmware update it`s tell me that i have latest version.

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#3
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Re:OpenVPN disable compression MR600 v3
2023-01-18 19:49:25

after few more test (now we have OpenVPN 2.6 rc2 almost final release) and asking people on openvpn board i can tell that compression not working because new OpenVPN version also add new network driver dco. This new driver openvpn-dco under Windows and Linux with final version 2.6 will be default driver that OpenVPN will use. So maybe if i test compression with other older driver like wintun or tap possibly it would work but anyway everyone on the OpenVPN forum recommends not to use the compression option which is simply abandoned and considered unsafe.

 

If the creators of OpenVPN directly write not to use compression, then we must just do it.

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#4
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Re:OpenVPN disable compression MR600 v3
2023-01-19 03:02:52

  @joksik 

 

Hi, thanks a lot for the update.

I have already sent feedback to our senior engineer about the suggestion to disable compression for OpenVPN server on our 4G routers, we will upload the related information to the official website if there are any updates, please pay attention to the changes on the official website.

 

If there is any further issue regarding the OpenVPN, please let us know. Thanks again!

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#5
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Re:OpenVPN disable compression MR600 v3
2023-02-01 09:32:13

any information about this issue ?

after i update OpenVPN to version 2.6 i can`t connect anymore to my router.

In logs i have:

 

2023-02-01 10:29:36 Exiting due to fatal error

2023-02-01 10:29:46 WARNING: Compression for receiving enabled. Compression has been used in the past to break encryption. Sent packets are not compressed unless "allow-compression yes" is also set.

 

when i back to OpenVPN 2.5.8 it`s works.

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#6
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Re:OpenVPN disable compression MR600 v3
2023-05-02 11:49:19

few months later, any news from engineers about disable compresion in openvpn or maybe beta firmware for mr600 v3 to test ?

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#7
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