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API Reference — Performing External Network Penetration Test

Libraries Used

  • socket: TCP port scanning and banner grabbing
  • subprocess: Execute nmap with XML output parsing
  • dns.resolver (dnspython): DNS record enumeration and subdomain discovery
  • ssl: TLS certificate inspection and cipher analysis
  • xml.etree.ElementTree: Parse nmap XML output

CLI Interface

python agent.py scan --host <target_ip> [--ports 22 80 443]
python agent.py nmap --target <ip_or_range> [--type quick|full|vuln|udp]
python agent.py dns --domain <domain>
python agent.py ssl --host <hostname> [--port 443]

Core Functions

tcp_port_scan(host, ports) — Scan TCP ports with banner grabbing

Scans 22 common ports by default. Returns open ports with service banners.

run_nmap_scan(target, scan_type) — Execute nmap and parse XML results

Scan types: quick (top 100 -sV), full (-p- -sC), vuln (NSE vuln scripts), udp (top 50 UDP).

dns_enumeration(domain) — Enumerate DNS records and subdomains

Queries A, AAAA, MX, NS, TXT, SOA, CNAME records. Tests 10 common subdomain prefixes.

ssl_check(host, port) — Inspect TLS certificate and cipher suite

Returns subject, issuer, validity dates, TLS version, and negotiated cipher.

Default Port List

21 (FTP), 22 (SSH), 23 (Telnet), 25 (SMTP), 53 (DNS), 80 (HTTP), 110 (POP3), 135 (RPC), 139 (NetBIOS), 143 (IMAP), 443 (HTTPS), 445 (SMB), 993/995 (IMAPS/POP3S), 1433 (MSSQL), 1521 (Oracle), 3306 (MySQL), 3389 (RDP), 5432 (PostgreSQL), 5900 (VNC), 8080/8443 (HTTP Proxy/Alt HTTPS)

Dependencies

pip install dnspython

System: nmap (optional, for advanced scanning)