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feat(cistech-tunnel): add auto-connect, menu flag, watchdog, fix host routing

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- Auto-connect on startup (skip with -m/--menu flag)
- Add VPN watchdog for auto-reconnect
- Add live TOTP display
- Fix host-routing.sh pipefail issue with grep
- Better forwarding rules similar to rego-tunnel
This commit is contained in:
Alex Zaw
2026-01-17 16:40:55 +00:00
parent 84b1eb3f5d
commit 9a6e2f67e6
2 changed files with 196 additions and 75 deletions
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4
apps/cistech-tunnel/shared/host-routing.sh
View File

@@ -93,8 +93,8 @@ remove_all() {
done
# Remove masquerade rule (using nft)
local handle
handle=$(nft -a list chain ip nat POSTROUTING 2>/dev/null | grep "saddr $LAN_SUBNET.*oifname.*$BRIDGE_NAME.*masquerade" | grep -oP 'handle \K\d+' | head -1)
local handle=""
handle=$(nft -a list chain ip nat POSTROUTING 2>/dev/null | grep "saddr $LAN_SUBNET.*oifname.*$BRIDGE_NAME.*masquerade" | grep -oP 'handle \K\d+' | head -1 || true)
if [ -n "$handle" ]; then
nft delete rule ip nat POSTROUTING handle "$handle" 2>/dev/null || true
fi

265
apps/cistech-tunnel/shared/openconnect-vpn
View File

@@ -1,16 +1,24 @@
#!/bin/bash
# OpenConnect-SSO VPN Connection Script
# Usage: ./openconnect-vpn [-c|--connect] [-d|--disconnect] [-s|--status] [--setup-keyring] [--help]
# Cistech VPN Connection Script with OpenConnect-SSO
# Usage: ./openconnect-vpn [-c|--connect] [-d|--disconnect] [-m|--menu] [-r|--routes] [-s|--status] [--help]
#
# Options:
# -c, --connect Connect to VPN and exit
# -d, --disconnect Disconnect VPN and exit
# -m, --menu Skip auto-connect, show menu directly
# -r, --routes Show routing table and exit
# -s, --status Show VPN status and exit
# --help Show this help message
# Credentials from environment variables (set by runtipi)
VPN_EMAIL="${VPN_EMAIL:-}"
VPN_PASSWORD="${VPN_PASSWORD:-}"
VPN_TOTP_SECRET="${VPN_TOTP_SECRET:-}"
VPN_HOST="${VPN_HOST:-}"
TARGET_IP="${TARGET_IP:-}"
TARGET_IP="${TARGET_IP:-10.3.1.0}"
VPN_INTERFACE="${VPN_INTERFACE:-tun0}"
IBMI_HOST="10.3.1.201"
CONTAINER_NETWORK="172.30.0.0/24"
# Log directory
LOG_DIR="/var/log/openconnect-vpn"
@@ -35,15 +43,15 @@ NC='\033[0m'
print_banner() {
echo -e "${CYAN}========================================${NC}"
echo -e "${CYAN} OpenConnect-SSO VPN Connection ${NC}"
echo -e "${CYAN} Cistech VPN Connection Script ${NC}"
echo -e "${CYAN}========================================${NC}"
echo ""
}
# Flags
SKIP_AUTO_CONNECT=false
DO_CONNECT=false
DO_DISCONNECT=false
DO_SETUP_KEYRING=false
# Logging
log() {
@@ -61,6 +69,7 @@ log() {
WARN) echo -e "${GRAY}[$timestamp_short]${NC} ${YELLOW}[WARN]${NC} $msg" ;;
ERROR) echo -e "${GRAY}[$timestamp_short]${NC} ${RED}[ERROR]${NC} $msg" ;;
DEBUG) echo -e "${GRAY}[$timestamp_short]${NC} ${CYAN}[DEBUG]${NC} $msg" ;;
CMD) echo -e "${GRAY}[$timestamp_short]${NC} ${GRAY}[CMD]${NC} $msg" ;;
*) echo -e "${GRAY}[$timestamp_short]${NC} $msg" ;;
esac
}
@@ -68,7 +77,7 @@ log() {
run_cmd() {
local desc="$1"
shift
log DEBUG "$desc: $*"
log CMD "$desc: $*"
output=$("$@" 2>&1)
local rc=$?
if [ -n "$output" ]; then
@@ -79,12 +88,35 @@ run_cmd() {
return $rc
}
# Fetch server certificate fingerprint from VPN host
show_help() {
echo -e "${CYAN}Cistech VPN Connection Script${NC}"
echo ""
echo "Usage: $0 [OPTIONS]"
echo ""
echo "Options:"
echo " -c, --connect Connect to VPN and exit"
echo " -d, --disconnect Disconnect VPN and exit"
echo " -m, --menu Skip auto-connect, show menu directly"
echo " -r, --routes Show routing table and exit"
echo " -s, --status Show VPN status and exit"
echo " --help Show this help message"
echo ""
echo "Menu Options:"
echo " 1 - Connect VPN"
echo " 2 - Disconnect VPN"
echo " 3 - Show VPN status"
echo " 4 - Setup IP forwarding"
echo " 5 - Test connection"
echo " 6 - Show network status"
echo " 7 - Show routing table"
echo " 8 - Show live TOTP"
echo " q - Quit"
}
# Fetch server certificate fingerprint
get_server_cert() {
local host="$1"
# Strip protocol and path to get just hostname:port
local server=$(echo "$host" | sed -E 's|^https?://||; s|/.*$||')
# Add default port if not specified
[[ "$server" != *:* ]] && server="${server}:443"
log DEBUG "Fetching server certificate from $server..."
@@ -103,7 +135,7 @@ get_server_cert() {
fi
}
# Setup keyring with credentials for openconnect-sso
# Setup keyring with credentials
setup_keyring() {
log INFO "Setting up keyring credentials..."
@@ -116,19 +148,16 @@ setup_keyring() {
import keyring
from keyrings.alt.file import PlaintextKeyring
# Use plaintext keyring (works without desktop environment)
keyring.set_keyring(PlaintextKeyring())
email = "$VPN_EMAIL"
password = "$VPN_PASSWORD"
totp_secret = "$VPN_TOTP_SECRET"
# Store password
if password:
keyring.set_password('openconnect-sso', email, password)
print(f"Password stored in keyring for {email}")
# Store TOTP secret
if totp_secret:
keyring.set_password('openconnect-sso', f'totp/{email}', totp_secret.upper())
print(f"TOTP secret stored in keyring for {email}")
@@ -144,27 +173,19 @@ PYTHON
fi
}
show_help() {
echo -e "${CYAN}OpenConnect-SSO VPN Connection Script${NC}"
get_totp() {
oathtool --totp -b "$VPN_TOTP_SECRET"
}
show_totp() {
log INFO "Starting live TOTP display (Ctrl+C to stop)"
echo ""
echo "Usage: $0 [OPTIONS]"
echo ""
echo "Options:"
echo " -c, --connect Connect to VPN"
echo " -d, --disconnect Disconnect from VPN"
echo " -s, --status Show VPN status"
echo " -r, --routes Show routing table"
echo " --setup-keyring Setup keyring credentials only"
echo " --help Show this help message"
echo ""
echo "Environment Variables:"
echo " VPN_EMAIL Email/username for SSO"
echo " VPN_PASSWORD Password for SSO"
echo " VPN_TOTP_SECRET TOTP secret for 2FA"
echo " VPN_HOST VPN server hostname"
echo " TARGET_IP Target IP for connectivity test"
echo " VPN_INTERFACE TUN interface name (default: tun0)"
echo " IBM_HOST IBM i Host"
while true; do
TOTP=$(get_totp)
SECONDS_LEFT=$((30 - ($(date +%s) % 30)))
echo -ne "\r ${CYAN}Current TOTP:${NC} ${GREEN}$TOTP${NC} (expires in ${YELLOW}${SECONDS_LEFT}s${NC}) "
sleep 1
done
}
get_vpn_interface() {
@@ -295,7 +316,7 @@ disconnect_vpn() {
}
setup_forwarding() {
log INFO "Setting up IP forwarding rules..."
log INFO "Setting up IP forwarding rules for $TARGET_IP..."
local vpn_iface=$(get_vpn_interface)
if [ -z "$vpn_iface" ]; then
@@ -310,19 +331,42 @@ setup_forwarding() {
log DEBUG "VPN IP: $vpn_ip"
log DEBUG "Container IP: $container_ip"
# Enable IP forwarding
run_cmd "Enabling IP forwarding" sysctl -w net.ipv4.ip_forward=1
# NAT masquerade for container network
if ! iptables -t nat -C POSTROUTING -o "$vpn_iface" -j MASQUERADE 2>/dev/null; then
run_cmd "Adding NAT masquerade" iptables -t nat -A POSTROUTING -o "$vpn_iface" -j MASQUERADE
# NAT masquerade for container network going through VPN
if ! iptables -t nat -C POSTROUTING -s "$CONTAINER_NETWORK" -o "$vpn_iface" -j MASQUERADE 2>/dev/null; then
run_cmd "Adding NAT masquerade for container network -> VPN" iptables -t nat -A POSTROUTING -s "$CONTAINER_NETWORK" -o "$vpn_iface" -j MASQUERADE
else
log DEBUG "NAT masquerade for container network already exists"
fi
# Forward rules at position 1
iptables -D FORWARD -d "$TARGET_IP" -j ACCEPT 2>/dev/null || true
iptables -D FORWARD -s "$TARGET_IP" -j ACCEPT 2>/dev/null || true
iptables -D FORWARD -s "$CONTAINER_NETWORK" -j ACCEPT 2>/dev/null || true
iptables -D FORWARD -d "$CONTAINER_NETWORK" -j ACCEPT 2>/dev/null || true
run_cmd "Inserting forward rule (to container network)" iptables -I FORWARD 1 -d "$CONTAINER_NETWORK" -j ACCEPT
run_cmd "Inserting forward rule (from container network)" iptables -I FORWARD 1 -s "$CONTAINER_NETWORK" -j ACCEPT
run_cmd "Inserting forward rule (from target)" iptables -I FORWARD 1 -s "$TARGET_IP" -j ACCEPT
run_cmd "Inserting forward rule (to target)" iptables -I FORWARD 1 -d "$TARGET_IP" -j ACCEPT
log INFO "Forwarding rules configured"
echo ""
# Trigger host routing service restart if available
if [ -d /runtime ]; then
# Trigger host routing service restart
log INFO "Triggering host routing service restart..."
touch /runtime/restart-routing 2>/dev/null || true
sleep 2
if [ ! -f /runtime/restart-routing ]; then
log INFO "Host routing service restarted"
else
log WARN "Host watcher may not be running (trigger file still exists)"
fi
log INFO "Routing configured for $TARGET_IP through VPN tunnel"
echo ""
}
connect_vpn() {
@@ -341,6 +385,13 @@ connect_vpn() {
# Setup keyring credentials
setup_keyring
# Fetch server certificate
log INFO "Fetching server certificate..."
local servercert=$(get_server_cert "$VPN_HOST")
log INFO "Connecting to: $VPN_HOST"
log DEBUG "Interface: $VPN_INTERFACE"
# Build openconnect-sso command
local sso_args=()
sso_args+=("-s" "$VPN_HOST")
@@ -349,12 +400,9 @@ connect_vpn() {
sso_args+=("-u" "$VPN_EMAIL")
fi
# Use hidden browser for automated login
sso_args+=("--browser-display-mode" "hidden")
# Fetch server certificate
log INFO "Fetching server certificate..."
local servercert=$(get_server_cert "$VPN_HOST")
# Build openconnect args
local oc_args=()
oc_args+=("--protocol=anyconnect")
@@ -366,12 +414,9 @@ connect_vpn() {
log DEBUG "Server cert: $servercert"
fi
log INFO "Connecting to: $VPN_HOST"
log DEBUG "Interface: $VPN_INTERFACE"
# Launch openconnect-sso
log INFO "Launching openconnect-sso..."
openconnect-sso "${sso_args[@]}" -- /usr/sbin/openconnect "${oc_args[@]}" &
openconnect-sso "${sso_args[@]}" -- sudo /usr/sbin/openconnect "${oc_args[@]}" &
OC_PID=$!
disown $OC_PID
log DEBUG "openconnect-sso started with PID $OC_PID"
@@ -399,34 +444,95 @@ connect_vpn() {
log DEBUG " Interface: $vpn_iface"
log DEBUG " VPN IP: $vpn_ip"
# Wait for routes to stabilize
log DEBUG "Waiting for routes to stabilize..."
sleep 3
# Setup forwarding
setup_forwarding
# Test connection if TARGET_IP is set
if [[ -n "$IBMI_HOST" ]]; then
log INFO "Testing connection to $IBMI_HOST..."
if ping -c 2 -W 3 "$IBMI_HOST" &>/dev/null; then
# Test connection
if [[ -n "$TARGET_IP" ]]; then
log INFO "Testing connection to $TARGET_IP..."
if ping -c 2 -W 3 "$TARGET_IP" &>/dev/null; then
log INFO "Connection test: ${GREEN}SUCCESS${NC}"
else
log WARN "Connection test: ${RED}FAILED${NC}"
log WARN "Connection test: ${RED}FAILED${NC} (may need manual route on host)"
fi
fi
# Disable screen blanking
xset s off 2>/dev/null || true
xset -dpms 2>/dev/null || true
xset s noblank 2>/dev/null || true
log DEBUG "Screen blanking disabled"
log INFO "VPN setup complete"
# Start watchdog in background
start_watchdog &
WATCHDOG_PID=$!
log DEBUG "Watchdog started with PID $WATCHDOG_PID"
return 0
}
# Watchdog - monitors VPN and reconnects if dropped
start_watchdog() {
log INFO "Starting VPN watchdog (check every 60s, keepalive ping every 5min)..."
local check_interval=60
local keepalive_interval=300
local last_keepalive=0
local reconnect_attempts=0
local max_reconnect_attempts=3
while true; do
sleep $check_interval
local now=$(date +%s)
local vpn_iface=$(get_vpn_interface)
if [ -n "$vpn_iface" ]; then
# VPN is up
reconnect_attempts=0
# Keepalive ping every 5 minutes
if [ $((now - last_keepalive)) -ge $keepalive_interval ]; then
if [[ -n "$TARGET_IP" ]] && ping -c 1 -W 5 "$TARGET_IP" &>/dev/null; then
log DEBUG "Keepalive ping to $TARGET_IP successful"
else
log WARN "Keepalive ping to $TARGET_IP failed (VPN may be degraded)"
fi
last_keepalive=$now
fi
else
# VPN is down
((reconnect_attempts++))
log WARN "VPN disconnected! Reconnect attempt $reconnect_attempts/$max_reconnect_attempts..."
if [ $reconnect_attempts -le $max_reconnect_attempts ]; then
connect_vpn
else
log ERROR "Max reconnect attempts reached. Manual intervention required."
sleep 300
reconnect_attempts=0
fi
fi
done
}
# Main menu
main_menu() {
echo -e "${GREEN}Options:${NC}"
echo -e " ${CYAN}1${NC} - Connect VPN"
echo -e " ${CYAN}2${NC} - Disconnect VPN"
echo -e " ${CYAN}3${NC} - Show VPN status"
echo -e " ${CYAN}4${NC} - Setup IP forwarding"
echo -e " ${CYAN}5${NC} - Test connection"
echo -e " ${CYAN}4${NC} - Setup IP forwarding only"
echo -e " ${CYAN}5${NC} - Test connection to $TARGET_IP"
echo -e " ${CYAN}6${NC} - Show network status"
echo -e " ${CYAN}7${NC} - Show routing table"
echo -e " ${CYAN}8${NC} - Setup keyring"
echo -e " ${CYAN}8${NC} - Show live TOTP"
echo -e " ${CYAN}q${NC} - Quit"
echo ""
}
@@ -442,6 +548,10 @@ parse_args() {
DO_DISCONNECT=true
shift
;;
-m|--menu)
SKIP_AUTO_CONNECT=true
shift
;;
-s|--status)
print_banner
check_vpn_status
@@ -453,10 +563,6 @@ parse_args() {
show_routes
exit 0
;;
--setup-keyring)
DO_SETUP_KEYRING=true
shift
;;
--help)
show_help
exit 0
@@ -468,6 +574,11 @@ parse_args() {
;;
esac
done
if [ "$DO_CONNECT" = "true" ] && [ "$DO_DISCONNECT" = "true" ]; then
echo "Error: --connect and --disconnect are mutually exclusive"
exit 1
fi
}
# Main
@@ -476,7 +587,8 @@ cleanup_old_logs
echo "" >> "$(get_log_file)"
echo "========================================" >> "$(get_log_file)"
log INFO "openconnect-vpn script started"
log INFO "=== Starting OpenConnect-SSO VPN ==="
echo ""
log DEBUG "VPN_EMAIL=$VPN_EMAIL"
log DEBUG "VPN_HOST=$VPN_HOST"
log DEBUG "TARGET_IP=$TARGET_IP"
@@ -484,11 +596,6 @@ log DEBUG "VPN_TOTP_SECRET is $([ -n "$VPN_TOTP_SECRET" ] && echo 'set' || echo
print_banner
if [ "$DO_SETUP_KEYRING" = "true" ]; then
setup_keyring
exit $?
fi
if [ "$DO_DISCONNECT" = "true" ]; then
disconnect_vpn
exit $?
@@ -499,7 +606,21 @@ if [ "$DO_CONNECT" = "true" ]; then
exit $?
fi
# Interactive menu mode
# Auto-connect logic (unless -m flag)
if [ "$SKIP_AUTO_CONNECT" = "true" ]; then
log INFO "Menu mode - skipping auto-connect"
elif check_vpn_status; then
echo ""
log INFO "VPN already connected. Setting up forwarding..."
setup_forwarding
else
echo ""
log INFO "Auto-starting VPN connection..."
echo ""
connect_vpn
fi
# Interactive menu loop
while true; do
echo ""
main_menu
@@ -514,15 +635,15 @@ while true; do
2) disconnect_vpn ;;
3) check_vpn_status ;;
4) setup_forwarding ;;
5) if [[ -n "$IBMI_HOST" ]]; then
log INFO "Testing connection to $IBMI_HOST..."
ping -c 3 "$IBMI_HOST" && log INFO "Connection test: ${GREEN}SUCCESS${NC}" || log ERROR "Connection test: ${RED}FAILED${NC}"
5) if [[ -n "$TARGET_IP" ]]; then
log INFO "Testing connection to $TARGET_IP..."
ping -c 3 "$TARGET_IP" && log INFO "Connection test: ${GREEN}SUCCESS${NC}" || log ERROR "Connection test: ${RED}FAILED${NC}"
else
log WARN "IBMI_HOST not set"
log WARN "TARGET_IP not set"
fi ;;
6) show_network_status ;;
7) show_routes ;;
8) setup_keyring ;;
8) show_totp ;;
q|Q) log INFO "Goodbye!"; exit 0 ;;
*) ;;
esac