OpenVPN with Viscosity connection can’t handle two clients

DominikHoffmann · Nov 21, 2020, 8:15 PM

I have set up an OpenVPN server on my pfSense box at home. It works just fine, and when connecting using tap, it’s almost an identical experience to being at home.

However, when I connect two clients (Mac) to the VPN, the cycle through making the connection, cutting it, and establishing it. I have only been able to test this with both being on the same outside network (my neighbor’s or my son’s school’s). I have not tried this with both clients making VPN connections from different outside LANs.

Here is the log that shows what might be going on. I myself do not possess enough expertise to understand what is.

Here is the part of the Viscosity log file that shows what’s going on (I’ll look for the pfSense OpenVPN logs and will put them in a follow-up message in this thread):

2020-11-21 14:42:15: Viscosity Mac 1.9 (1556)
2020-11-21 14:42:15: Viscosity OpenVPN Engine Started
2020-11-21 14:42:15: Running on macOS 11.0.1
2020-11-21 14:42:15: ---------
2020-11-21 14:42:15: State changed to Connecting
2020-11-21 14:42:15: Valid existing endpoint found... 208.xxx.xxx.xxx:443:tcp4-client
2020-11-21 14:42:15: TCP/UDP: Preserving recently used remote address: [AF_INET]208.xxx.xxx.xxx:443
2020-11-21 14:42:15: Attempting to establish TCP connection with [AF_INET]208.xxx.xxx.xxx:443 [nonblock]
2020-11-21 14:42:17: TCP connection established with [AF_INET]208.xxx.xxx.xxx:443
2020-11-21 14:42:17: TCPv4_CLIENT link local: (not bound)
2020-11-21 14:42:17: TCPv4_CLIENT link remote: [AF_INET]208.xxx.xxx.xxx:443
2020-11-21 14:42:17: State changed to Authenticating
2020-11-21 14:42:18: [server] Peer Connection Initiated with [AF_INET]208.xxx.xxx.xxx:443
2020-11-21 14:42:19: Preserving previous TUN/TAP instance: en12
2020-11-21 14:42:19: Initialization Sequence Completed
2020-11-21 14:42:19: Disabling DHCP on interface en12 (not required)
2020-11-21 14:42:19: DNS mode set to Split
2020-11-21 14:42:19: State changed to Connected
2020-11-21 14:42:24: Connection reset, restarting [0]
2020-11-21 14:42:24: SIGUSR1[soft,connection-reset] received, process restarting

… and then it repeats itself.

DominikHoffmann · Nov 21, 2020, 8:18 PM

This post is deleted!

DominikHoffmann · Nov 21, 2020, 8:22 PM

OpenVPN log:

Nov 21 20:12:36	openvpn	59802	MANAGEMENT: Client connected from /var/etc/openvpn/server3.sock
Nov 21 20:12:37	openvpn	59802	MANAGEMENT: CMD 'status 2'
Nov 21 20:12:37	openvpn	59802	MANAGEMENT: CMD 'quit'
Nov 21 20:12:37	openvpn	59802	MANAGEMENT: Client disconnected
Nov 21 20:13:41	openvpn	59802	MANAGEMENT: Client connected from /var/etc/openvpn/server3.sock
Nov 21 20:13:41	openvpn	59802	MANAGEMENT: CMD 'status 2'
Nov 21 20:13:41	openvpn	59802	MANAGEMENT: CMD 'quit'
Nov 21 20:13:41	openvpn	59802	MANAGEMENT: Client disconnected

… and so on.

DominikHoffmann · Nov 21, 2020, 9:07 PM

Just tried it with one client connecting to my home LAN through my neighbor’s WiFi network and this laptop connecting to it through a public xfinitywifi hotspot.

Same issue. I wonder, what the interaction between two clients is.