Print Lease Info Neighbor Scan Release

Transmits ARP requests to discover neighbors and prints lease information.

Terminal

sudo <path/to>/pig.py -n -r -o <eth1>

sudo <path/to>/pig.py -n -r -o <eth1>

#!/bin/bash

# Print Lease Info Neighbor Scan Release
sudo {{path/to}}/pig.py {{[-n|--neighbors-scan-arp]}} {{[-r|--neighbors-attack-release]}} {{[-o|--show-options]}} {{eth1}}

import subprocess

# Print Lease Info Neighbor Scan Release
# Make sure to replace <placeholders> with actual values
def run_command():
    cmd = [
        "path-to-pig.py",
        "<path/to>/pig.py",
        "-n",
        "-r",
        "-o",
        "<eth1>"
    ]
    
    try:
        print(f"Executing: {' '.join(cmd)}")
        subprocess.run(cmd, check=True)
    except subprocess.CalledProcessError as e:
        print(f"Error: {e}")
    except FileNotFoundError:
        print("Error: path-to-pig.py not found. Please install it first.")

if __name__ == "__main__":
    run_command()

When To Use

When troubleshooting network issues related to IP allocations or inspecting DHCP lease records.

Pro Tip

Use in conjunction with network scanning tools to confirm devices are reachable post-ARP query.

Terminal Output

Expected runtime feedback

Simulated preview

Output

$ sudo path/to/pig.py --neighbors-scan-arp --neighbors-attack-release eth1
Scanning neighbors on eth1...

Neighbor Table:
+----------------+----------------+----------------+
| IP Address     | MAC Address     | Lease Status    |
+----------------+----------------+----------------+
| 192.168.1.10   | 00:1A:2B:3C:4D:5E| Active          |
| 192.168.1.20   | 00:1A:2B:3C:4D:5F| Inactive        |
+----------------+----------------+----------------+
Releasing lease for 192.168.1.10...
Lease released successfully.

Anatomy of Output

Understanding the result

sudo path-to-pig.py --neighbors-scan-arp --neighbors-attack-release --show-options eth1 Command Executed

Executes ARP scan and performs release using specified options.

[INFO] Discovering neighbors on eth1... Process Notification

Indicates initiation of the ARP discovery process.

[LEASE] IP: 192.168.1.10, MAC: 00:11:22:33:44:55 Lease Information

Displays active DHCP leases for discovered devices.

Troubleshooting

Common pitfalls

bash: path-to-pig.py: No such file or directory

Solution: Check the full path to the script for accuracy.

[ERROR] Insufficient permissions for ARP operations

Solution: Run command with sudo or ensure user permissions.

Error: Interface eth1 cannot receive packets

Solution: Check that eth1 is configured correctly and operational.

Command Breakdown

What each part is doing

sudo: Base Command; The executable that performs this operation. Here it runs Path To Pig.py before the shell applies any redirect operators.
<path/to>: path to; The value supplied for path to.
-n: n| neighbors scan arp; The value supplied for n| neighbors scan arp.
-r: r| neighbors attack release; The value supplied for r| neighbors attack release.
-o: o| show options; The value supplied for o| show options.
<eth1>: eth1; The value supplied for eth1.
-n: Command Option; Tool-specific option used by this command invocation.
-r: Command Option; Tool-specific option used by this command invocation.
-o: Command Option; Tool-specific option used by this command invocation.

How To Run

Execution path

Step 1
Run the command with sudo privileges.
Step 2
Specify the interface (e.g., eth1) for scanning.
Step 3
Review the output for lease information.

Alternative Approaches

Comparable commands in other tools

Alternative networking tools for the same job.

Dnsmasq / Display Dnsmasq Version dnsmasq --version Curl / Send Form Encoded Data curl -X POST -d '<name=bob>' {http://example.com/form} Openvpn / Connect To Host With Same Static Key sudo openvpn --remote <bob.example.com> --dev <tun1> --ifconfig <10.4.0.2> <10.4.0.1> --secret <path/to/key> Ifconfig / Convert Command Output To Json Via Pipe <ifconfig> | jc <--ifconfig> Jc / Convert Command Output To Json Via Magic Syntax jc <ifconfig>