maxxer
Hi.
I'm having a very strange situation. I've this industrial device (Moxa) with Debian9 installed. It has a custom 3G modem and a SIM card, everything works fine.
I've set up a OpenVPN server with https://pritunl.com]Pritunl[/url], very quick and fast, working like a charm.
Today they called me the device connection is randomly dropping. To make the long story short, everything is fine until I try to ssh to the Moxa via the VPN. If I do web traffic it's ok, if I ssh the 3G connection drops! Pings to 8.8.8.8 stop responding until the GSM connection is restarted few times (from three to who knows), then it returns online.
I've been looking at htop during all the time but the server didn't seem overwhelmed.
How is it possible that ssh traffic in VPN drops the GSM connection? Can it be something related to MTU?
This is the VPN client config, if matters.
Thanks
setenv UV_ID 6372cc2971e3492ab3f0ec3c6ed605c9
setenv UV_NAME calm-waters-7517
client
dev tun
dev-type tun
remote vpn.server.it 11505 udp
nobind
persist-tun
cipher AES-128-CBC
auth SHA1
verb 2
mute 3
push-peer-info
ping 10
ping-restart 60
hand-window 70
server-poll-timeout 4
reneg-sec 2592000
sndbuf 393216
rcvbuf 393216
max-routes 1000
remote-cert-tls server
comp-lzo no
key-direction 1
