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.
npxskills add zebbern/claude-code-guide--skill "Network 101"Loading…
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.
Set up a basic HTTP web server for testing:
Windows IIS Setup:
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
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
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:
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
Set up SMB file shares for enumeration:
Windows SMB Share:
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
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
| Service | Port | Protocol |
|---|---|---|
| HTTP | 80 | TCP |
| HTTPS | 443 | TCP |
| SNMP | 161 | UDP |
| SMB | 445 | TCP |
| NetBIOS | 137-139 | TCP/UDP |
# 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
| 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 |
# 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
# 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
# Configure anonymous share
sudo apt install samba
sudo mkdir /srv/samba/anonymous
sudo chmod 777 /srv/samba/anonymous
# Test access
smbclient //localhost/anonymous -N
| 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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