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Revision as of 12:13, 11 August 2018 by Larivact (talk | contribs) (DNS leaks: new section)
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Missing details

There are some things that I think would have been extremely helpful to add in this article, primarily relating to iptables. For example, in Routing_the_LAN_of_a_client_to_the_server it might have been useful to say, "do something like iptables -t nat -A POSTROUTING -o eth1 -j SNAT --to" rather than "Use the iptables NAT feature to masquerade the IP packets."

I think more handholding would help this article a lot--it certainly would have helped me figure this out much faster. If no one disagrees, I'd like to add several sections on appropriate iptables rules to add. Buhman 17:11, 9 April 2012 (EDT)

No objections, all constructive contributions are welcome, just remember that an article shouldn't be just a list of instructions: "handholding" is fine as long as it also explains why something needs to be done, so in your example above the existent sentence should be kept and your iptables line should be presented just as an example. -- Kynikos 08:46, 10 April 2012 (EDT)
To be honest, I think this article, the way it is now, uses way too much handholding. (I liked it more the way it was [1] ). It have things like: "Edit /root/easy-rsa/vars and at a minimum set the KEY_COUNTRY, KEY_PROVINCE, KEY_CITY, KEY_ORG, and KEY_EMAIL parameters (do not leave any of these parameters blank)", instead of just "Edit /root/easy-rsa/vars according to your preferences"
Maybe the solution could be the path Beginners' Guide and Installation Guide took; One, super handholding-type guide, and the other as a checklist-type guide... hmm, maybe I'll write such article Chrisl (talk) 18:48, 16 August 2012 (UTC)
I have some time to work on this again (vacation), hopefully I'll get at least some more stuff done. If someone wants to add iptables instructions please go ahead. There is some preliminary stuff that Kynikos uncovered :) Too much, too little handholding, it's hard too say, and it looks like opinions differ. Maybe let me be verbose and then try to tighten it up and remove unwanted verbosity? jhernberg 21:50, 16 August 2012 (UTC)

In any case, the article still needs a lot more information about the various ways that openvpn can be configured, and any help would be very much appreciated...:) jhernberg 21:55, 16 August 2012 (UTC)

Well, I have created the checklist-type article, is here: OpenVPN Checklist Guide Right now, it has lots of things of the old openvpn article, but shorter. The idea is that it have links like "click here to see more details" pointing to the section of a full article explaining something, to avoid repetition. I must add that I think this way is more KISS. Chrisl (talk) 04:55, 17 August 2012 (UTC)

Personally and at the moment I don't have much time nor interest in updating this article. But I also think it could really benefit from having sections written on IPv6, L2 bridging and possibly a related article describing how to use iptables and other firewall software with VPN. I really hope that someone can step up to the plate and write the missing sections and to correct whatever I got wrong! Jhernberg (talk) 14:33, 14 June 2014 (UTC)

A piece of missing information that I consider particularly useful is the configuration of credentials for the user, so that he/she doesn't have to type them every time the VPN is started. I found out how to do that in an external site, but I'm wondering: is there is a reason that information is not in the guide, or can I just happily add it? --Bruno.unna (talk) 10:53, 26 August 2016 (UTC)

Yes, there is a reason: it's an optional feature. The diy server config example in this article does not use --auth-user-pass-verify scripts, so the client must not provide user/pass. Vpn providers like yours use auth directives as a resource efficient method to permit/deny access to their service. --Indigo (talk) 18:02, 26 August 2016 (UTC)
Plus, having a username/password when using the ovpn profiles seems superfluous... after all, we are already using strong keys. I don't see what benefit the username/password provides for security. If anything, it complicates the entire setup. Just my 2 cents Graysky (talk) 18:25, 26 August 2016 (UTC)

Link to upstream document instead of duplicating

This page is already a little long. OpenVPN has lots of good document here. It is better give some entry point and link to the upstream document instead of duplicate info here. After all, it is Arch Wiki, not OpenVPN wiki. -- Fengchao (talk) 03:38, 17 August 2012 (UTC)


If someone could add this section, it would be very much appreciated. Jhernberg (talk) 01:05, 28 June 2014 (UTC)

Connecting to vpn server from Android

I recommend using OpenVPN for Android by Arne Schwabe which give allot of detail that can help troubleshooting. The ovpn file with embedded keys & certificates need to be used, See a proper example in the the link bellow. The reduced privileges won't work on android and also "key-direction 1" should be added. Server side configs are the same as in the wiki. --Dhead (talk) 22:51, 5 March 2013 (UTC

IPv4 forwarding

I'd like to suggest adding a section on IP packet forwarding info to this page. If you follow the instructions for setting up forwarding using iptables and ufw only, it still won't work without forwarding packets.

Traditionally, this has been a simple process of:

# sysctl net.ipv4.ip_forward=1

(or editing /etc/sysctl.d/30-ipforward.conf for a more permanent change)

But there is a bug right now where systemd-networkd overrides net.ipv4.ip_forward. This might be good to point out for people trying to setup OpenVPN on Arch.

As of now, someone setting up OpevVPN could only find this out from from a small link to enable packet forwarding and then catching the bug note on that page. Setting up OpenVPN was a frustrating experience since this was buried; I was stuck on this for several hours, and finally found the solution.

Thought this might be helpful for others out there. Respectfully, Jr000 (talk) 00:13, 29 May 2015 (UTC)

OpenVPN#Routing_all_client_traffic_through_the_server already says "Now you need to enable packet forwarding on the server.", with a link to Internet_sharing#Enable_packet_forwarding which contains the instructions and the note you mentioned. There is no point in duplicating the instructions, because sooner or later one version would inevitably become outdated/inaccurate. -- Lahwaacz (talk) 09:36, 29 May 2015 (UTC)

OpenVPN in a container

This is a good solution instead of messing around with iptables: —This unsigned comment is by Hendry (talk) 03:39, 6 August 2015‎. Please sign your posts with ~~~~!

Nameserver Order

In case VPN provided name servers are appended at the end of /etc/resolv.conf while using networkmanager-openvpn, make sure you don't configure your primary network connection by systemd (using dhcpcd.service for example). It is caused by openresolv configuration option interface_order because one set of nameservers is provided by network interface (for example eth0) and second set of nameservers is provided by NetworkManager interface (yes, that is not a typo, all interfaces configured by NetworkManager are presented to openresolv as one "NetworkManager" interface). You can check which nameservers are provided to openresolv by running

$ resolvconf -l

To solve this issue, either disable systemd interface configuration (systemctl disable dhcpcd for example) or change interface order in /etc/resolvconf.conf (interface_order="lo lo[0-9]* NetworkManager" for example). Kenny (talk) 15:06, 11 March 2016 (UTC)

Interesting point. Yet, it is always difficult to mix different network managers. For a mixed conf not to fail one should probably configure, eg NetworkManager and dhcpcd, to exclude the respective other interface first. Anyhow, as I understand your point, the same ordering issue could arise from any combination of network manager tools, and openvpn is just one application triggering openresolv where it may matter. What do you think about adding your input to Resolv.conf#Using_openresolv instead? It could then be crosslinked better (from OpenVPN#DNS and other articles where it may matter). --Indigo (talk) 19:21, 11 March 2016 (UTC)
If OpenVPN needs some special ordering of the name servers, isn't the script (openvpn-update-resolv-confAUR) to blame here? If openresolv does not support ordering, the script should not use it in the first place... -- Lahwaacz (talk) 19:45, 11 March 2016 (UTC)
Well, openresolv supports different types of ordering (resolvconf.conf(5)), which is another reason the issue applies more to resolv.conf#Using_openresolv (ordering for the links). The typical approach for openvpn usually is that the server should (not all do, that would be an openvpn troubleshooting matter) push DNS with a low metric. The metric alone is enough to ensure they are ordered first. --Indigo (talk) 21:17, 11 March 2016 (UTC)

Proposed restructuring

Currently, the article on OpenVPN and those surrounding it are a mess at best. There's OpenVPN itself, of which the first line says "This article describes a basic installation and configuration of OpenVPN, suitable for private and small business use.", yet it lists none of the basic configuration, but only far more extended stuff. To get it running in it's most basic state, you have to go to Easy-rsa and OpenVPN Checklist Guide, and still haven't found anything useful in the main article. Besides that, there's OpenVPN in Linux containers and OpenVPN Bridge.

Thus I propose a rewrite of all of those: The OpenVPN article should contain the basic configuration to get a simple client-server-setup running, and an additional page called "OpenVPN/Tips and tricks", which contains the advanced configurations currently found in OpenVPN, OpenVPN in Linux containers and OpenVPN Bridge. Easy-rsa and OpenVPN Checklist Guide could then be deleted, as they are merged into OpenVPN.

The version I propose to take the place of the current OpenVPN article is User:Dustball/OpenVPN.

Dustball (talk) 14:28, 16 October 2016 (UTC)

Gotta disagree with your assessment that the article is "a mass at best." It could be compartmentalized as you propose, but all key data are here and linked. As to your draft of a bare-bones article, I recommend simply linking the already streamlined easy-rsa article rather than duplicating any content. Have you drafted the other broken out pages you alluded to in your post as well? Graysky (talk) 14:52, 16 October 2016 (UTC)
In an article stating it describes basic installation and configuration, those parts shouldn't be linked. The other part isn't written yet, I intend to do so tomorrow and link it here again. Dustball (talk) 14:54, 16 October 2016 (UTC)
We need a primary article that links all sub-articles pertaining to this software if the compartmentalization is to be a success. Looking forward to seeing your proposed changes for the rest of them as well. Graysky (talk) 14:58, 16 October 2016 (UTC)


I'd like to propose adding an LDAP section describing how to have OpenVPN authenticate against an OpenLDAP server. This could be an optional step and does not require client certificates. Cirkit (talk) 00:32, 23 September 2017 (UTC)

tls-crypt as default: is it worth it?

There seem to be two options to use: tls-auth or tls-crypt. tls-auth is the "old" option and is also in the examples in /usr/share/openvpn/examples/. tls-crypt seems to be better, and is recommended in this guide since this edit. However, tls-crypt is not compatible with all clients. (I personally ran into trouble with the official OpenVPN Connect app for Android)

To clarify that it is not compatible with all clients, I added a bunch of notes. This doesn't look great and might be confusing.

My question: Isn't it better to keep tls-auth as default, and move tls-crypt under OpenVPN#Hardening the server? Or does it really add that much (security wise) to warrant recommending it as default?

-- Lonaowna (talk) 20:54, 10 August 2018 (UTC)

I'm afraid my knowledge base isn't much deeper than a few google hits. I have no experience upon which to draw. Graysky (talk) 00:12, 11 August 2018 (UTC)
I can verify that I am using `tls-crypt` on my server and that one of my clients is using the droid version of OpenVPN connect. Graysky (talk) 00:41, 11 August 2018 (UTC)
You'll have to use the (opensource) OpenVPN for Android client, instead of the official one. Here is an example of a profile I'm using:
dev tun
remote 1194 udp
resolv-retry infinite
tun-mtu 1400
mssfix 1360
sndbuf 393216
rcvbuf 393216
push "sndbuf 393216"
push "rcvbuf 393216"
;user nobody
;group nobody
verb 3
cipher AES-256-CBC
auth SHA512
compress lz4
remote-cert-tls server
key-direction 1
# 2048 bit OpenVPN static key
-----BEGIN OpenVPN Static key V1-----
-----END OpenVPN Static key V1-----

DNS leaks

Regarding the Prevent leaks if VPN goes down section, I don't get why "DNS will not work unless running a dedicated DNS server", the ufw rules above the warning appear to allow DNS.

--Larivact (talk) 12:13, 11 August 2018 (UTC)