Add Windows DNS Leak fix using WFP ('block-outside-dns') This option blocks all out-of-tunnel communication on TCP/UDP port 53 (except for OpenVPN itself), preventing DNS …
However, --block-outside-dns can be used by simply adding it to that config file, provided you use Windows Vista or newer (this does not work on Windows XP) Ensure you have a server push a suitable DNS server. For further help please post your log file at verb 4 See --log, --verb and --block-outside-dns in The Manual v23x This will cause the DNS entries for your VPN device to be used (and only while the VPN connection is active). You can set them according to the answer by @brunoqc. While you're at it, you should probably also add the openvpn option block-outside-dns, to ensure that DNS queries are not leaking. This answer is based upon this very useful blog post. He configured OpenVPN TCP without persist-tun on the > client side and pushes block-outside-dns from server. > > When he restarts OpenVPN server, DNS no longer works on the clients. > Neither with or without VPN. Users say this can be fixed only with > rebooting, I believe restarting service would help too. > Is this only with 2.4.2 or is 2.4.1 also affected? As you imply, the filters won't Blocking DNS Queries to External Resolvers¶. This procedure will allow the firewall to block DNS requests to servers that are off this network. This can force DNS requests from local clients to use the DNS Forwarder or Resolver on pfSense® for resolution. OpenVPN User Posts: 20 Joined: Sat Sep 15, 2018 4:44 pm. block-outside-dns for linux. Post by TommyKL » Sun Nov 04, 2018 5:20 pm Wasn't sure how to ask my question in the subject but here I will explain. In my client-template.txt file, I have setenv opt On my OpenVPN server (2.0.25) in the Advanced VPN settings, I want to add the "block-outside-dns" option to the configuration script sent to the client. I am assuming that it needs to be entered either in the Server Config Directives box or the Client Config directives box, but what do I add and where? Do I put "setenv opt block-outside-dns" in the Client Config directives box? OpenVPN v2.3.9+ As of OpenVPN version 2.3.9 you can now prevent DNS leaks by specifying a new OpenVPN option. Simply open the .conf (or .ovpn) file for the server that you are connecting to and add the following on a new line. For more information see the OpenVPN manual. block-outside-dns
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OpenVPN v2.3.9+ As of OpenVPN version 2.3.9 you can now prevent DNS leaks by specifying a new OpenVPN option. Simply open the .conf (or .ovpn) file for the server that you are connecting to and add the following on a new line. For more information see the OpenVPN manual. block-outside-dns add an option ("block-outside-dns" or something more creative) this option would enable this protection feature on Win32, and be pushable from the server on other platforms that do not need this or do not have a capability to enable this, it would be a no-op or just print a warning, but not an error (so it can be always pushed) Re: [Openvpn-devel] block-outside-dns and persist-tun Re: [Openvpn-devel] block-outside-dns and persist-tun From: ValdikSS
OpenVPN Access Server supports pushing an instruction to a connecting OpenVPN client to use a specific DNS server. Actually it supports pushing 2 DNS servers, in case the first one fails to respond. This can be configured in the Admin UI under VPN Settings. The Access Server also supports sending additional instructions for DNS Resolution Zones, which functions like a type of split-DNS where
push «block-outside-dns» Добавила эту настройку, вторая push "dhcp-option DNS х.х.х.х" уже была ранее, её оставила. В итоге, виндовский клиент успешно захватил новую настройку (поняла по логам при подключении - Blocking outside dns using service succeeded. . Thu Jun 25 11:50:29 2020 OpenVPN 2.4.4 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on May 14 2019 Thu Jun 25 11:50:29 2020 library versions: OpenSSL 1.1.1 11 Sep 2018, LZO 2.08 Thu Jun 25 11:50:29 2020 ECDH curve prime256v1 added Thu Jun 25 11:50:29 2020 Outgoing Control Channel Encryption: Cipher 'AES-256-CTR' initialized with 256 bit key Thu Jun