Add files via upload

network_info.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+# network_info.sh - Show network interfaces, routes, open ports, firewall rules
+# 
+# Copyright (C) 2025 LINUXexpert.org
+# 
+# This program is free software: you can redistribute it and/or modify it 
+# under the terms of the GNU General Public License as published by the 
+# Free Software Foundation, version 3 of the License.
+# 
+# This program is distributed in the hope that it will be useful, but 
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
+# for more details.
+# 
+# You should have received a copy of the GNU General Public License along 
+# with this program. If not, see <https://www.gnu.org/licenses/>.
+# 
+# Usage: network_info.sh    (no arguments)
+# Description: Displays network interface addresses, routing table, open ports, and iptables rules.
+ 
+echo "==== Network Interfaces (IP addresses) ===="
+if command -v ip &> /dev/null; then
+  ip -brief addr show    # brief output of interfaces and addresses
+elif command -v ifconfig &> /dev/null; then
+  ifconfig -a
+else
+  echo "No network interface tool (ip or ifconfig) available."
+fi
+
+echo -e "\n==== Routing Table ===="
+if command -v ip &> /dev/null; then
+  ip route show
+elif command -v route &> /dev/null; then
+  route -n
+else
+  echo "No routing tool (ip or route) available."
+fi
+
+echo -e "\n==== Listening Ports (TCP/UDP) ===="
+if command -v ss &> /dev/null; then
+  ss -tulwn   # show TCP/UDP ports in listen state with numeric addresses
+elif command -v netstat &> /dev/null; then
+  netstat -tuln
+else
+  echo "No socket listing tool (ss or netstat) available."
+fi
+
+echo -e "\n==== Firewall Rules (iptables) ===="
+if command -v iptables &> /dev/null; then
+  iptables -L -n -v    # list firewall rules with numeric addresses and packet counts
+else
+  echo "iptables command not found (no firewall rules to show or using nftables)."
+fi