Network penetration testing is what most people imagined “hacking” was before web and API testing came to dominate the industry. It still matters — more in some contexts than others — and the work is different enough from application testing that organizations without dedicated network-focused testers often miss it. This is the practitioner’s guide to network penetration testing for Indian organizations in 2026, covering external and internal scope, methodology, and what the cloud transition has done to the discipline.
External vs internal network testing
External network penetration testing
Scope: your organization’s internet-facing attack surface. Goal: identify what an attacker with no prior access can discover and exploit.
Methodology:
- Asset enumeration — all internet-facing IPs, hostnames, cloud accounts, domains
- Port and service scanning — what is reachable from the internet
- Service fingerprinting and version identification
- Vulnerability identification — known CVEs, misconfigurations, exposed management interfaces
- Exploitation — demonstrating actual compromise where vulnerabilities exist
- Post-exploitation — showing what an attacker could do from a foothold
Internal network penetration testing
Scope: your organization’s internal network, typically starting from an assumed compromise (phished laptop, rogue contractor, physically-planted device). Goal: assess lateral-movement resistance and blast radius.
Methodology:
- Initial reconnaissance from the assumed-foothold position
- Credential gathering — local credentials, cached credentials, service accounts
- Active Directory reconnaissance — SPN enumeration, group membership, trust relationships
- Lateral movement — pass-the-hash, pass-the-ticket, Kerberoasting, admin-console exploitation
- Privilege escalation — local and domain
- Segmentation testing — can you move between network zones that should be isolated
- Target-focused testing — specific objectives like “gain access to production database” or “read the CEO’s email”
The cloud transition
For a cloud-native Indian SaaS on AWS/Azure/GCP, “network” testing has evolved:
- External testing becomes partially cloud configuration testing — security groups, load balancers, WAF rules
- Internal testing becomes partially IAM and network-policy testing — can an attacker who compromises one pod reach others; can a leaked credential be used to access resources
- Kubernetes clusters have their own network surface — pod-to-pod communication, ingress, egress
- VPC peering and cross-account relationships replace traditional network segmentation
For organizations with predominantly cloud infrastructure, a pure network penetration test has less value than a combined cloud-security-and-internal-reconnaissance engagement.
When traditional network testing still matters most
- Organizations with significant on-premises infrastructure — data centers, manufacturing networks, OT/ICS environments
- Regulated entities with specific network-testing obligations (RBI, SEBI frameworks)
- Organizations with mixed hybrid environments — VPN connections to cloud, legacy systems with network dependencies
- Post-acquisition assessment of an acquired network
- Large enterprises with significant Active Directory infrastructure
Tools — what modern network testing actually uses
- Reconnaissance: Subfinder, Amass, crt.sh, Shodan, Censys for asset discovery
- Scanning: Nmap (primary), Masscan for high-speed port scans at scale
- Vulnerability identification: Nuclei with current templates, Nessus or OpenVAS for comprehensive CVE coverage
- Exploitation frameworks: Metasploit Framework still dominant; CrackMapExec (now NetExec) for Windows/AD-centric work; Sliver and Havoc as modern C2 frameworks
- Active Directory-specific: BloodHound and Sharphound for attack-path visualization; Impacket tools (GetUserSPNs, secretsdump, ntlmrelayx); Rubeus for Kerberos abuse
- Network analysis: Wireshark, tcpdump; Zeek for deeper traffic analysis
- Credential handling: hashcat for offline cracking; CyberChef for transformation
Common findings — external
- Exposed administrative interfaces (VPN gateway management UI, Jenkins, Grafana, Kubernetes dashboard)
- Unpatched VPN appliances with known CVEs (Fortinet, Citrix, Pulse patterns recurring)
- Internet-reachable databases or caches with weak or default credentials
- SMTP servers allowing open relay or authenticated relay with weak credentials
- DNS misconfigurations enabling subdomain takeover or zone transfer
- TLS configurations with deprecated protocols and weak cipher suites
- Exposed
.gitdirectories,.envfiles, backup archives in web root
Common findings — internal
- Kerberoasting successful with service accounts in privileged groups (see our practitioner guide)
- Password reuse enabling pass-the-hash lateral movement
- Unprotected network file shares with sensitive data
- Missing segmentation between workstation networks and server networks
- Plaintext credentials in scripts, configuration files, or Group Policy preferences
- LLMNR/NBT-NS poisoning attacks successful
- SMB signing not enforced enabling relay attacks
- Legacy authentication protocols (NTLMv1, LM hashes) still accepted
The engagement
Typical scopes and durations:
- External network test, small perimeter (≤50 IPs): 5 tester-days, ₹75,000–₹1,25,000
- External network test, large perimeter (≥200 IPs): 10–15 tester-days, ₹1,50,000–₹3,00,000
- Internal network test, single AD forest: 10–15 tester-days, ₹1,50,000–₹3,00,000
- Combined external + internal: 15–25 tester-days, ₹2,50,000–₹5,00,000
- Red team engagement (extended timeline, adversary emulation): 30–60 days, ₹8–25 lakh
Related reading
- VAPT Services in India: The Complete Buyer’s Guide
- Kerberoasting in 2026: The Practitioner Playbook
- Active Directory Security Hardening
For a network penetration test scoped to your environment, book a scoping call.