- 1 Missing details
- 2 Link to upstream document instead of duplicating
- 3 L2 ethernet bridging
- 4 IPv6
- 5 Firewalls?
- 6 Using resolvconf with user nobody
- 7 Connecting to vpn server from Android
- 8 IPv4 forwarding
- 9 OpenVPN in a container
- 10 Nameserver Order
- 11 Using OpenVPN's client.up script instead of update-resolv-conf from the AUR
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 10.4.4.30" 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  ). 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)
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)
L2 ethernet bridging
I was going to add this information today, but realized that there have been so many changes in the init system, and that network configuration has gotten a lot more complex. I need to figure out what set of scripts to use to create the bridge interface, at the moment I'm inclined to go with the netcfg scripts. Any opinions? -- Jhernberg (talk) 16:40, 24 August 2012 (UTC)
Firewalls imo are really out of scope and would make the article even longer.. Any opinions on what and how much to add? Maybe something simple like these iptable rules:
-A INPUT -i tun+ -j ACCEPT
-A FORWARD -i tun+ -j ACCEPT -A FORWARD -i eth+ -j ACCEPT -A FORWARD -j REJECT
But then how much of a disclaimer would one write as someone could compromise the entire corporate security plan with an insecure nat translating VPN...
Using resolvconf with user nobody
user nobodyis used in the client's config, the update-resolv-conf on down fails, because it is executed as nobody.
Using openvpn-down-root.so could be used as a workaround:
plugin /usr/lib/openvpn/openvpn-down-root.so "script_type=down /usr/share/openvpn/update-resolv-conf"
- Thanks for posting this solution, upstream documentation for it is in . I can confirm it works in debian (pre-systemd), however, testing this it seems that it does not work with Arch. Any idea why (packaging bug, systemd)?
- Another work-around to drop priviledges was proposed with  (cf stub discussion at ).
- Opinions how to best handle the issue?
- --Indigo (talk) 10:16, 12 February 2016 (UTC)
- Tried it again and it appears to work now. Added it with  as well as an example with . Closing. --Indigo (talk) 09:38, 29 May 2016 (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. http://dl.dropbox.com/u/6902100/archlinux/openvpn/client-empty.ovpn --Dhead (talk) 22:51, 5 March 2013 (UTC
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
/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.
- 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: https://www.youtube.com/watch?v=7Obl8_dozh0& —This unsigned comment is by Hendry (talk) 03:39, 6 August 2015. Please sign your posts with ~~~~!
In case VPN provided name servers are appended at the end of
/etc/resolv.conf while using , make sure you don't configure your primary network connection by (using
dhcpcd.service for example). It is caused by 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
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)
- Well, 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) supports different types of ordering (resolvconf.conf(5)), which is another reason the issue applies more to
Using OpenVPN's client.up script instead of update-resolv-conf from the AUR
Currently, in OpenVPN#DNS, update-resolv-conf from the AUR is used to handle nameservers pushed from the server. Recently, this script stopped working for me, but using the provided client.up script by openvpn (/usr/share/openvpn/contrib/pull-resolv-conf/client.up) fixed the issue. If the former script would work for me, both scripts appear to fix the same issue. Anyway: others may have happened upon the same issue as me.
Should the section be changed to use the provided script instead?
- Interesting, myself I was unaware of the client.up script. Since it is upstream, it should definetely be described as the first method. Please go ahead, if you want. IMO we can still mention/link the AUR package as alternative, I use it on one machine and it continues to work here. Did you check the journal for why it failed on your box?
- And another question: Did you, by chance, try the upstream script for #Using resolvconf with user nobody as well? (it is referenced in client.up comments).
- --Indigo (talk) 17:25, 18 April 2016 (UTC)
- Added with . Closing, cheers. --Indigo (talk) 09:40, 29 May 2016 (UTC)