TLS Error with OpenVPN server

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GeekBoy
DD-WRT Novice


Joined: 06 Feb 2009
Posts: 10

PostPosted: Thu Sep 30, 2021 22:19    Post subject: TLS Error with OpenVPN server Reply with quote
I got an old Buffalo router I been using for years as a OpenVPN client.

It has Firmware: DD-WRT v24SP2- (11/05/13) std. Can this even be upgraded? as it came from Buffalo with DD-WRT

I have a new server with Debian 10. It is giving me:

Quote:
Thu Sep 30 17:14:27 2021 189.156.78.194:56208 SIGUSR1[soft,tls-error] received, client-instance restarting
Thu Sep 30 17:15:30 2021 189.156.78.194:33661 TLS: Initial packet from [AF_INET]1xxx.xxx.xxx.xxx:33661, sid=a972f244 7533ca59
Thu Sep 30 17:15:30 2021 189.156.78.194:33661 TLS error: Unsupported protocol. This typically indicates that client and server have no common TLS version enabled. This can be caused by mismatched tls-version-min and tls-version-max options on client and server. If your OpenVPN client is between v2.3.6 and v2.3.2 try adding tls-version-min 1.0 to the client configuration to use TLS 1.0+ instead of TLS 1.0 only
Thu Sep 30 17:15:30 2021 189.156.78.194:33661 OpenSSL: error:14209102:SSL routines:tls_early_post_process_client_hello:unsupported protocol


I have been trying different Encryption Ciphers, and Hash Algorithms without luck.

Anyone got some advice on this?

Thanks!
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kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 14125
Location: Texas, USA

PostPosted: Thu Sep 30, 2021 22:49    Post subject: Reply with quote
Which router, specifically? You should be able to upgrade to a newer firmware version. The current release is 09/28/2021 - r47495.
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GeekBoy
DD-WRT Novice


Joined: 06 Feb 2009
Posts: 10

PostPosted: Thu Sep 30, 2021 23:03    Post subject: Reply with quote
It's a WHR-300HP2D.

I do see an update for it from 2018. Let me try that.

Thanks for taking the time to respond.

But for upgrade, I did sort of mean with DD-WRT instead of Buffalo's firmware.

Update: Firmware is now

DD-WRT v3.0-r30357 std (12/20/17)
ANd it is now connected to the VPN.

Thanks again!
bushant
DD-WRT Guru


Joined: 18 Nov 2015
Posts: 2028

PostPosted: Thu Sep 30, 2021 23:42    Post subject: Reply with quote
Link to DD-WRT 47495

https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2021/09-28-2021-r47495/buffalo_whr_300hp2/

https://wiki.dd-wrt.com/wiki/index.php/Supported_Devices#Buffalo
kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 14125
Location: Texas, USA

PostPosted: Fri Oct 01, 2021 0:06    Post subject: Reply with quote
Yes, the version on Buffalo's site is older:

https://www.buffalotech.com/products/airstation-highpower-n300-open-source-dd-wrt-wireless-router

Which is the version you flashed, but the current version is the one both @bushant and I mentioned. You will probably want to consider upgrading at some point, depending. Glad it's working for you!

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GeekBoy
DD-WRT Novice


Joined: 06 Feb 2009
Posts: 10

PostPosted: Sat Oct 16, 2021 18:45    Post subject: Reply with quote
That seems to of resolved some issues.

Thanks!
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