OpenConnect client

  • 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 client.

# Install packages
opkg update
opkg install openconnect openssl-util
# Configuration parameters

Transfer server certificate to VPN client. Generate certificate hash.

# Generate certificate hash
VPN_HASH="pin-sha256:$(openssl x509 -in ${VPN_CERT} -pubkey -noout \
| openssl pkey -pubin -outform der \
| openssl dgst -sha256 -binary \
| openssl enc -base64)"

Fetch server certificate remotely if necessary.

Consider VPN network as public. Assign VPN interface to WAN zone to minimize firewall setup.

# Configure firewall
uci rename firewall.@zone[0]="lan"
uci rename firewall.@zone[1]="wan"
uci del_list"${VPN_IF}"
uci add_list"${VPN_IF}"
uci commit firewall
service firewall restart

Set up VPN interface.

# Configure network
uci -q delete network.${VPN_IF}
uci set network.${VPN_IF}="interface"
uci set network.${VPN_IF}.proto="openconnect"
uci set network.${VPN_IF}.server="${VPN_SERV}"
uci set network.${VPN_IF}.port="${VPN_PORT}"
uci set network.${VPN_IF}.username="${VPN_USER}"
uci set network.${VPN_IF}.password="${VPN_PASS}"
uci set network.${VPN_IF}.serverhash="${VPN_HASH}"
uci commit network
service network restart

Configure dynamic connection if necessary.

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
service log restart; service network restart; sleep 10
# Log and status
logread -e openconnect
# Runtime configuration
pgrep -f -a openconnect
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
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  • Last modified: 2023/12/01 07:50
  • by vgaetera