I have OpenVPN configuration with following setup files. It's working without problems when I use UDP protocol. But I need TCP on 443 port to pass through proxy somewhere. When I use it, VPN creates tunnel, I can ping servers, but when I try to access some HTTP server (in our subnet behind VPN server), page starts to load, sometimes part of page is displayed, but after moment, data stops loading and VPN is not working, I can't ping anything over VPN. When I reconnect VPN, situation is repeating. As I wrote, with UDP there is no problem. Any idea?
ifconfig 192.168.78.1 255.255.255.0
ifconfig-pool 192.168.78.10 192.168.78.49 255.255.255.0
push "route 192.168.1.0 255.255.255.0 192.168.78.1"
plugin /usr/lib/openvpn/openvpn-auth-pam.so login
keepalive 10 120
remote <server name>