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network-101

This skill should be used when the user asks to "set up a web server", "configure HTTP or HTTPS", "perform SNMP enumeration", "configure SMB shares", "test network services", or needs guidance on configuring and testing network services for penetration testing labs.

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Install / Use

npx skills add zebbern/claude-code-guide --skill network-101

Installs into whichever agent you are using.

About this skill
📄

SKILL.md

Installable skill definition

Quality Score

94/100

Category

Security

Supported Platforms

Universal

Our assessment of network-101

network-101 scores 94/100 on our quality scale, 315th of 775 Security skills we index (top 41%).

Its SKILL.md is 7.3 KB long, well organised into 76 sections with 15 code examples: a thorough specification that gives an agent plenty to work with.

With 4,638 GitHub stars, it is one of the more widely adopted skills in the catalogue.

Substance
29/30
Structure
20/20
Description
15/15
Adoption
16/20
Freshness
15/15

Maintenance, license and trust

  • The repository was last updated 2 days ago, so network-101 is actively maintained.
  • It is released under the MIT license, a permissive license that allows use, modification and commercial use with attribution.
  • Its trust signals score 100/100, with no cautions. These come from repository metadata, not a code audit — read the skill file before letting an agent act on it.

network-101 compared with similar skills

All 4 of these similar skills score higher than network-101; compare them before choosing.

SkillScoreStarsUpdatedFormat
network-101 (this skill)by zebbern944.6k2d agoSKILL.md
algorithmic-artby anthropics100177.9k5d agoSKILL.md
pptxby anthropics100177.9k5d agoSKILL.md
designby nextlevelbuilder100130.2k7d agoSKILL.md
ui-ux-pro-maxby nextlevelbuilder100130.2k7d agoSKILL.md

Frequently asked questions

How do I install network-101?
Run npx skills add zebbern/claude-code-guide --skill network-101. The install tabs above show the steps for each supported agent.
Which AI agents does network-101 work with?
It is written for Universal, as a SKILL.md file. Other agents that read the same format can often use it too.
Is network-101 safe to use?
It is MIT-licensed and scores 100/100 on trust signals. Skills are instructions an agent will follow, so read the file before installing it and do not approve commands you do not understand.
Is network-101 still maintained?
The repository was last updated 2 days ago, so network-101 is actively maintained.

Skill content

View source on GitHub

name: network-101 description: This skill should be used when the user asks to "set up a web server", "configure HTTP or HTTPS", "perform SNMP enumeration", "configure SMB shares", "test network services", or needs guidance on configuring and testing network services for penetration testing labs. metadata: author: zebbern version: "1.1"

Network 101

Purpose

Configure and test common network services (HTTP, HTTPS, SNMP, SMB) for penetration testing lab environments. Enable hands-on practice with service enumeration, log analysis, and security testing against properly configured target systems.

Inputs/Prerequisites

  • Windows Server or Linux system for hosting services
  • Kali Linux or similar for testing
  • Administrative access to target system
  • Basic networking knowledge (IP addressing, ports)
  • Firewall access for port configuration

Outputs/Deliverables

  • Configured HTTP/HTTPS web server
  • SNMP service with accessible communities
  • SMB file shares with various permission levels
  • Captured logs for analysis
  • Documented enumeration results

Core Workflow

1. Configure HTTP Server (Port 80)

Set up a basic HTTP web server for testing:

Windows IIS Setup:

  1. Open IIS Manager (Internet Information Services)
  2. Right-click Sites → Add Website
  3. Configure site name and physical path
  4. Bind to IP address and port 80

Linux Apache Setup:

# Install Apache
sudo apt update && sudo apt install apache2

# Start service
sudo systemctl start apache2
sudo systemctl enable apache2

# Create test page
echo "<html><body><h1>Test Page</h1></body></html>" | sudo tee /var/www/html/index.html

# Verify service
curl http://localhost

Configure Firewall for HTTP:

# Linux (UFW)
sudo ufw allow 80/tcp

# Windows PowerShell
New-NetFirewallRule -DisplayName "HTTP" -Direction Inbound -Protocol TCP -LocalPort 80 -Action Allow

2. Configure HTTPS Server (Port 443)

Set up secure HTTPS with SSL/TLS:

Generate Self-Signed Certificate:

# Linux - Generate certificate
sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 \
  -keyout /etc/ssl/private/apache-selfsigned.key \
  -out /etc/ssl/certs/apache-selfsigned.crt

# Enable SSL module
sudo a2enmod ssl
sudo systemctl restart apache2

Configure Apache for HTTPS:

# Edit SSL virtual host
sudo nano /etc/apache2/sites-available/default-ssl.conf

# Enable site
sudo a2ensite default-ssl
sudo systemctl reload apache2

Verify HTTPS Setup:

# Check port 443 is open
nmap -p 443 192.168.1.1

# Test SSL connection
openssl s_client -connect 192.168.1.1:443

# Check certificate
curl -kv https://192.168.1.1

3. Configure SNMP Service (Port 161)

Set up SNMP for enumeration practice:

Linux SNMP Setup:

# Install SNMP daemon
sudo apt install snmpd snmp

# Configure community strings
sudo nano /etc/snmp/snmpd.conf

# Add these lines:
# rocommunity public
# rwcommunity private

# Restart service
sudo systemctl restart snmpd

Windows SNMP Setup:

  1. Open Server Manager → Add Features
  2. Select SNMP Service
  3. Configure community strings in Services → SNMP Service → Properties

SNMP Enumeration Commands:

# Basic SNMP walk
snmpwalk -c public -v1 192.168.1.1

# Enumerate system info
snmpwalk -c public -v1 192.168.1.1 1.3.6.1.2.1.1

# Get running processes
snmpwalk -c public -v1 192.168.1.1 1.3.6.1.2.1.25.4.2.1.2

# SNMP check tool
snmp-check 192.168.1.1 -c public

# Brute force community strings
onesixtyone -c /usr/share/seclists/Discovery/SNMP/common-snmp-community-strings.txt 192.168.1.1

4. Configure SMB Service (Port 445)

Set up SMB file shares for enumeration:

Windows SMB Share:

  1. Create folder to share
  2. Right-click → Properties → Sharing → Advanced Sharing
  3. Enable sharing and set permissions
  4. Configure NTFS permissions

Linux Samba Setup:

# Install Samba
sudo apt install samba

# Create share directory
sudo mkdir -p /srv/samba/share
sudo chmod 777 /srv/samba/share

# Configure Samba
sudo nano /etc/samba/smb.conf

# Add share:
# [public]
#    path = /srv/samba/share
#    browsable = yes
#    guest ok = yes
#    read only = no

# Restart service
sudo systemctl restart smbd

SMB Enumeration Commands:

# List shares anonymously
smbclient -L //192.168.1.1 -N

# Connect to share
smbclient //192.168.1.1/share -N

# Enumerate with smbmap
smbmap -H 192.168.1.1

# Full enumeration
enum4linux -a 192.168.1.1

# Check for vulnerabilities
nmap --script smb-vuln* 192.168.1.1

5. Analyze Service Logs

Review logs for security analysis:

HTTP/HTTPS Logs:

# Apache access log
sudo tail -f /var/log/apache2/access.log

# Apache error log
sudo tail -f /var/log/apache2/error.log

# Windows IIS logs
# Location: C:\inetpub\logs\LogFiles\W3SVC1\

Parse Log for Credentials:

# Search for POST requests
grep "POST" /var/log/apache2/access.log

# Extract user agents
awk '{print $12}' /var/log/apache2/access.log | sort | uniq -c

Quick Reference

Essential Ports

| Service | Port | Protocol | |---------|------|----------| | HTTP | 80 | TCP | | HTTPS | 443 | TCP | | SNMP | 161 | UDP | | SMB | 445 | TCP | | NetBIOS | 137-139 | TCP/UDP |

Service Verification Commands

# Check HTTP
curl -I http://target

# Check HTTPS
curl -kI https://target

# Check SNMP
snmpwalk -c public -v1 target

# Check SMB
smbclient -L //target -N

Common Enumeration Tools

| Tool | Purpose | |------|---------| | nmap | Port scanning and scripts | | nikto | Web vulnerability scanning | | snmpwalk | SNMP enumeration | | enum4linux | SMB/NetBIOS enumeration | | smbclient | SMB connection | | gobuster | Directory brute forcing |

Constraints

  • Self-signed certificates trigger browser warnings
  • SNMP v1/v2c communities transmit in cleartext
  • Anonymous SMB access is often disabled by default
  • Firewall rules must allow inbound connections
  • Lab environments should be isolated from production

Examples

Example 1: Complete HTTP Lab Setup

# Install and configure
sudo apt install apache2
sudo systemctl start apache2

# Create login page
cat << 'EOF' | sudo tee /var/www/html/login.html
<html>
<body>
<form method="POST" action="login.php">
Username: <input type="text" name="user"><br>
Password: <input type="password" name="pass"><br>
<input type="submit" value="Login">
</form>
</body>
</html>
EOF

# Allow through firewall
sudo ufw allow 80/tcp

Example 2: SNMP Testing Setup

# Quick SNMP configuration
sudo apt install snmpd
echo "rocommunity public" | sudo tee -a /etc/snmp/snmpd.conf
sudo systemctl restart snmpd

# Test enumeration
snmpwalk -c public -v1 localhost

Example 3: SMB Anonymous Access

# Configure anonymous share
sudo apt install samba
sudo mkdir /srv/samba/anonymous
sudo chmod 777 /srv/samba/anonymous

# Test access
smbclient //localhost/anonymous -N

Troubleshooting

| Issue | Solution | |-------|----------| | Port not accessible | Check firewall rules (ufw, iptables, Windows Firewall) | | Service not starting | Check logs with journalctl -u service-name | | SNMP timeout | Verify UDP 161 is open, check community string | | SMB access denied | Verify share permissions and user credentials | | HTTPS certificate error | Accept self-signed cert or add to trusted store | | Cannot connect remotely | Bind service to 0.0.0.0 instead of localhost |

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zebbern

View profile

View on GitHub
GitHub Stars4.6k
CategorySecurity
Updated2d ago
Forks469
zebbern/network-101

Languages

Python

Trust signals

100/100

From repository metadata: license, adoption, age and documentation. Not a code audit — see the Safety scan above for what the skill file itself contains.

No cautions