OpenConnect server

  • Encrypt your internet connection to enforce security and privacy.
    • Prevent traffic leaks and spoofing on the client side.
  • Bypass regional restrictions using commercial providers.
    • Escape client side content filters and internet censorship.
  • Access your LAN services remotely without port forwarding.

Install the required packages. Specify configuration parameters for VPN server.

# Install packages
opkg update
opkg install ocserv
# Configuration parameters
VPN_DNS="${VPN_POOL%.* *}.1"

Generate password hash for VPN client.

# Generate password hash
ocpasswd ${VPN_USER} << EOI
VPN_HASH="$(sed -n -e "/^${VPN_USER}:.*:/s///p" /etc/ocserv/ocpasswd)"

Consider VPN network as private. Assign VPN interface to LAN zone to minimize firewall setup. Allow access to VPN server from WAN zone.

# Configure firewall
uci rename firewall.@zone[0]="lan"
uci rename firewall.@zone[1]="wan"
uci del_list firewall.lan.device="vpns+"
uci add_list firewall.lan.device="vpns+"
uci -q delete firewall.oc
uci set firewall.oc="rule"
uci set"Allow-OpenConnect"
uci set firewall.oc.src="wan"
uci set firewall.oc.dest_port="4443"
uci set firewall.oc.proto="tcp udp"
uci set"ACCEPT"
uci commit firewall
/etc/init.d/firewall restart

Configure VPN service.

# Configure VPN service
uci -q delete ocserv.config.enable
uci -q delete
uci set ocserv.config.port="${VPN_PORT}"
uci set ocserv.config.ipaddr="${VPN_POOL% *}"
uci set ocserv.config.netmask="${VPN_POOL#* }"
uci -q delete ocserv.@routes[0]
uci -q delete ocserv.@dns[0]
uci set ocserv.dns="dns"
uci set ocserv.dns.ip="${VPN_DNS}"
uci -q delete ocserv.@ocservusers[0]
uci set ocserv.client="ocservusers"
uci set"${VPN_USER}"
uci set ocserv.client.password="${VPN_HASH}"
uci commit ocserv
/etc/init.d/ocserv restart

Establish the VPN connection. Verify your routing with traceroute and traceroute6.


Check your IP and DNS provider.

Collect and analyze the following information.

# Restart services
/etc/init.d/log restart; /etc/init.d/ocserv restart; sleep 10
# Log and status
logread -e ocserv; netstat -l -n -p | grep -e ocserv
# Runtime configuration
pgrep -f -a ocserv
ip address show; ip route show table all
ip rule show; ip -6 rule show; nft list ruleset
# Persistent configuration
uci show network; uci show firewall; uci show ocserv
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  • Last modified: 2023/03/25 06:46
  • by vgaetera