OpenVPN clients to an Official Laptop system MAC (Media Access Control) address

[kaushalshriyan]

Hi,

I am running the below OpenVPN version on CentOS Linux release 7.9.2009 (Core).

Code: Select all

OpenVPN 2.5.1 x86_64-redhat-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Feb 24 2021
library versions: OpenSSL 1.0.2k-fips  26 Jan 2017, LZO 2.06
Originally developed by James Yonan
Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>
Compile time defines: enable_async_push=yes enable_comp_stub=no enable_crypto_ofb_cfb=yes enable_debug=yes enable_def_auth=yes enable_dependency_tracking=no enable_dlopen=unknown enable_dlopen_self=unknown enable_dlopen_self_static=unknown enable_fast_install=yes enable_fragment=yes enable_iproute2=no enable_libtool_lock=yes enable_lz4=yes enable_lzo=yes enable_management=yes enable_multihome=yes enable_pam_dlopen=no enable_pedantic=no enable_pf=yes enable_pkcs11=yes enable_plugin_auth_pam=yes enable_plugin_down_root=yes enable_plugins=yes enable_port_share=yes enable_selinux=yes enable_shared=yes enable_shared_with_static_runtimes=no enable_silent_rules=yes enable_small=no enable_static=yes enable_strict=no enable_strict_options=no enable_systemd=yes enable_werror=no enable_win32_dll=yes enable_x509_alt_username=yes with_aix_soname=aix with_crypto_library=openssl with_gnu_ld=yes with_mem_check=no with_sysroot=no

Is there a way to restrict OpenVPN clients to an Official Laptop system MAC (Media Access Control) address to prevent users to install the OpenVPN Client to their own personal laptop or desktop as part of the security governance ( ISO 27001)

Please suggest if there are any alternative ways. Thanks in Advance. I look forward to hearing from you.

Best Regards,

Kaushal

[Pippin]

Take a look here:
https://github.com/TinCanTech/easy-tls/ ... ess-Policy

[TinCanTech]

@Pippin. Thanks!

@kaushalshriyan, If you have any question then you can ask me here.

[TinCanTech]

FYI: github.com is down! for me ...

It is Firefox 86.0 at fault. Or M$ don't want to play now that Firefox has "Cookie Jar" ..

[kaushalshriyan]

@TinCanTech

I am referring to https://github.com/TinCanTech/easy-tls/ ... ess-Policy to enable Metadata Access Policy to restrict OpenVPN clients to an Official Laptop system MAC (Media Access Control) address to prevent users to install the OpenVPN Client to their own personal laptop or desktop as part of the security governance. I have copied easy-tls to /etc/easy-rsa/ and while running ./easytls-cryptv2-verify.sh. I get

This script can ONLY be used by a running openvpn server.ERROR: Missing: OPENVPN_METADATA_FILE:

#ps aux | grep vpn
avahi 820 0.0 0.0 85280 4892 ? Ss May09 0:00 avahi-daemon: running [secondaryopenvpnserver.local]
nobody 55730 0.1 0.1 83568 8440 ? Ss 10:10 1:17 /usr/sbin/openvpn --status /run/openvpn-server/status-server.log --status-version 2 --suppress-timestamps --cipher AES-256-GCM --data-ciphers AES-256-GCM:AES-128-GCM:AES-256-CBC:AES-128-CBC:BF-CBC --config server.conf
root 55737 0.0 0.0 76536 4928 ? S 10:10 0:00 /usr/sbin/openvpn --status /run/openvpn-server/status-server.log --status-version 2 --suppress-timestamps --cipher AES-256-GCM --data-ciphers AES-256-GCM:AES-128-GCM:AES-256-CBC:AES-128-CBC:BF-CBC --config server.conf
root 92257 0.0 0.0 11780 1084 pts/0 S+ 21:07 0:00 grep --color=auto vpn

Please guide. I look forward to hearing from you. Thanks in Advance.

Best Regards,

Kaushal

[TinCanTech]

This script can ONLY be used by a running openvpn server.ERROR: Missing: OPENVPN_METADATA_FILE

Indeed, that is correct.

Please guide

Simple answer:

• Install Openvpn

• Install Easy-RSA version 3
• Create your Public Key Infra-structure
  What a load of Horse dung.. Public Key Infra-structure
  Who ever came up with that expression got a medal in Talking Bollocks

• Install Easy-TLS
  Essentially, copy Easy-TLS into your working Easy-RSA directory

• Use Easy-TLS

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  ./easytls init

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  ./easytls cf cg Custom-Group

  Configure your own Custom-Group

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  ./easytls build

  Create any OpenVPN defined TLS-Key
  Also, auto-inline upon request.

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  ./easytls inline

  Create Inline files not auto-created (Show me an example and I'll even considering adding it).

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  ./easytls script

  Create Openvpn Server configuration file to use Easy-TLS keys. data and scripts.

• Start your server using the Inline-file and configuration-file created above.

• Start your client using the Inline-file created above

• Debug your cock-ups

• Stand back in Wonder and Awe ..
  as OpenVPN now verifies your Client hardware-address tied to your Client TLS-Crypt-V2 Key,
  all created and configured by Easy-TLS

By me a beer!

[kaushalshriyan]

@TinCanTech Thanks a lot for sharing the steps and appreciate your help. I am currently going through it and setting it up on the server. I will keep you posted.