How to kill clients from the server side.
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Hi, I’m trying to find a way to kill connection from the Pfsense side. I tried to use “inactive” command, but idle clients seem to transmit packets all the time even when users are not using workstations. Also tried to play with “ping-restart” and “ping-exit”. Is there a way to stop client from re-connecting when I press “kill client connection”? When someone forgets to close the session from home workstation and then trying to connect from different location I can’t do anything. Thanks.
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Block the IP in firewall?
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Block the IP in firewall?
That is very "dirty" solution to the problem imo. There is another reason I would like to do it, currently I have rang of 9 IP addresses assigned for OpenVPN and when people forget to disconnect there is no "space" for other users.
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We, so raise the limit to more than 9? Really dunno which miracle solution are you expecting. You cannot disable the user itself obviously when your concern is that they cannot connect from another place.
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Sorry, I don't understand your aggressive post. There is a reason for number of connections, rising that number is not a solution but workaround. I can do that but first I would like to find a better way to do it. If it exists.
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Since, as you already determined, your allegedly "inactive" clients are not really inactive and they keep reconnecting anyway. So, you can either block the traffic, or disable the user account or whatever depending on what kind of authentication you are using. So, you dislike the former and cannot do the latter since your goal is not disabling the user. You also do not want to raise the number of allowed connections either for unspecified reason.
So - open a window and scream "It suxxxxxxxx!!!"…
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I can see how you manage to have an average 5 posts per day… ::)
What I don't want to do is:
- rise the number of connection
- disable users
- block the traffic in firewall
What I want to do is:
- prevent clients from reconnecting, when killed from gui.
I have no idea why inactive user is generating traffic, I've tested it, you can connect to VPN, lock the workstation, go for a beer and "Bytes Sent/Bytes Received" keep growing.
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so you kill the connection in gui, so why would the remote client not just reconnect?
So you kill the client, when do you want them to be able to reconnect? Ever, in 24 hours - what?
What sort of connections does the client create through the vpn? Window clients are noisy by nature, they will always be sending stuff out of their interfaces normally. Do they have mapped drives, there will be discovery stuff like SSDP, announcements for computer browsing service, etc. how much traffic are you seeing on these "idle" connections?
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If I could I'd like them never reconnect automatically, ideally user would have to press reconnect or log in again. I just tested, clean installation of Windows, no mapped drive:
Connected Since Bytes Sent Bytes Received
Fri Jun 12 13:42:28 2015 1.83 MB 270 KB -
I'm not really sure what you could do here. Anything you do to block the client connecting is going to stop them connecting again which is what you want to avoid.
You could perhaps use scheduled rules to block specific clients at night for example. OR scheduling in the authentication maybe.
I assume you want to be able to somehow disconnect the VPN such that the users then need to manually reconnect? That sounds like it might be a setting on the client side, disable 'auto-reconnect' or similar. It might cause more problems than it's worth though. ;)Edit: You answered some of that while I was typing!
Steve
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you could try to insert the following in your client configs (it might prevent credentials from being cached and might theoretically stop auto-reconnects)
auth-nocache -
OK, I found the solution, that was my lack of knowledge I suppose. What I did:
- edited server1.conf and removed "keepalive 10 30"
- pushed "ping-exit 10" to the clients
Now after 10 seconds from pressing "kill client connection" I can see "connection to XXX was terminated" on the user worksation.
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- edited server1.conf and removed "keepalive 10 30"
Don't do that. It'll be overwritten, and that part is unnecessary for the ping-exit.
- pushed "ping-exit 10" to the clients
Now after 10 seconds from pressing "kill client connection" I can see "connection to XXX was terminated" on the user worksation.
That works, though it'll potentially be an annoyance for users in that it won't reconnect on its own if there is a temporary loss of connectivity. Not a big deal if the clients are behind reliable Internet connections, but could be very annoying if some of those users are at a hotel or coffee shop or something where connectivity may be a bit spotty from time to time.
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What do you mean by "overwritten"? I just added it back and client is restarting connection on it's own as before. I've tried ping-exit on its own first place but it wasn't working. So I created this thread. As for second part we have 2 servers one for mobile users with 30+ concurrent connections.
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The conf file is created by the webgui php scripts whenever you make changes to the OpenVPN server. So if you edit the conf file directly any changes you make to it will be lost the next time you make a change via the webgui.
Try to use the advanced settings box in the webgui to make any changes that aren't directly covered. Though I'm unsure quite how you might make this particular change if it's already included.Steve
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So is there no way to permanently remove 'keepalive' from the server side? I rarely make changes to OpenVPN settings, I would have to remember to hash that line every time, it's not perfect but doable.
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/etc/inc/openvpn.inc
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I guess I could just add # to "$conf .= "keepalive 10 60\n";" to minimize risk of breaking it. Thanks doktornotor ;)
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You'd better use //
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I was thinking about something like that:
$conf .= "#keepalive 10 60\n";
So it would be "delivered" to config in offline state?