diff --git a/cockpit/cockpit-installer.sh b/cockpit/cockpit-installer.sh
index 5c2fcc9..77b5d9b 100644
--- a/cockpit/cockpit-installer.sh
+++ b/cockpit/cockpit-installer.sh
@@ -26,7 +26,6 @@ show_help() {
   echo "Usage: $0 [options]"
   echo ""
   echo "Options:"
-  echo "  --port     <port>      Cockpit port (default: 12345)"
   echo "  --user     <username>  User to create (default: user)"
   echo "  --password <password>  Password for the user (default: auto-generated)"
   echo "  --timezone <tz>        System timezone (default: UTC, e.g. Europe/Moscow)"
@@ -34,25 +33,20 @@ show_help() {
   echo ""
   echo "Examples:"
   echo "  $0"
-  echo "  $0 --port 8443"
-  echo "  $0 --port 8443 --user admin"
-  echo "  $0 --port 8443 --user admin --password MySecret123!"
-  echo "  $0 --port 8443 --timezone Europe/Moscow"
+  echo "  $0 --user admin"
+  echo "  $0 --user admin --password MySecret123!"
+  echo "  $0 --timezone Europe/Moscow"
   echo ""
 }
 
 # ─── Parse arguments ──────────────────────────────────────────────────────────
-COCKPIT_PORT=12345
+readonly COCKPIT_PORT=12345
 NEW_USER="user"
 USER_PASSWORD=""
 TIMEZONE="UTC"
 
 while [[ $# -gt 0 ]]; do
   case "$1" in
-    --port)
-      COCKPIT_PORT="$2"
-      shift 2
-      ;;
     --user)
       NEW_USER="$2"
       shift 2
@@ -90,43 +84,12 @@ if ! command -v apt &>/dev/null; then
 fi
 log_ok "OS check passed"
 
-# ─── Validate port ────────────────────────────────────────────────────────────
-validate_port() {
-  local port="$1"
-  if ! [[ "$port" =~ ^[0-9]+$ ]] || \
-       [ "$port" -lt 1 ] || \
-       [ "$port" -gt 65535 ]; then
-    return 1
-  fi
-  return 0
-}
-
-if ! validate_port "$COCKPIT_PORT"; then
-  log_err "Invalid port: '$COCKPIT_PORT'. Must be a number between 1 and 65535"
-  exit 1
-fi
-log_ok "Port validation passed: $COCKPIT_PORT"
-
 # ─── Check port is not in use ─────────────────────────────────────────────────
 if ss -tlnp | grep -q ":${COCKPIT_PORT} "; then
-  log_warn "Port $COCKPIT_PORT is already in use"
-  while true; do
-    # Print prompt directly to terminal, not to log
-    printf "${YELLOW}[~]${NC} Enter a new port: " > /dev/tty
-    read -r NEW_PORT < /dev/tty
-    if ! validate_port "$NEW_PORT"; then
-      log_err "Invalid port: '$NEW_PORT'. Must be a number between 1 and 65535"
-      continue
-    fi
-    if ss -tlnp | grep -q ":${NEW_PORT} "; then
-      log_err "Port $NEW_PORT is also in use. Try another"
-      continue
-    fi
-    COCKPIT_PORT="$NEW_PORT"
-    log_ok "Using port $COCKPIT_PORT"
-    break
-  done
+  log_err "Port $COCKPIT_PORT is already in use. The script uses a fixed Cockpit port and cannot continue"
+  exit 1
 fi
+log_ok "Cockpit will use fixed port $COCKPIT_PORT"
 
 # ─── Validate timezone ────────────────────────────────────────────────────────
 if ! timedatectl list-timezones | grep -qx "$TIMEZONE"; then