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Kioptrix Labs

Cybersecurity enthusiast and lifelong learner with extensive hands-on experience in vulnerable-machine labs and troubleshooting. I share practical lessons, mistakes, and open questions, and distinguish documented guidance from independently tested results. Learning Security by Doing — only in safe, authorized environments.

rpcclient Access Denied: SAMR and LSARPC Boundaries

October 24, 2026March 1, 2026 by Kioptrix Labs
rpcclient NT_STATUS_ACCESS_DENIED

Record an rpcclient access denial at the specific procedure and account context that failed. Use the evidence card to distinguish connection success from per-call permissions and keep other successful queries within their own scope.

Categories Kioptrix Series Tags NT_STATUS_ACCESS_DENIED, RPC Troubleshooting, Samba rpcclient, SMB Enumeration

rpcclient Connects but User Enumeration Fails

October 24, 2026February 28, 2026 by Kioptrix Labs
rpcclient enumdomusers fails

When rpcclient connects but user enumeration fails, record the exact call, identity and status. Use the operation coverage table to distinguish narrow successful queries from denied actions and retain the authorization boundary.

Categories Kioptrix Series Tags pentest reporting, rpcclient, SMB, Windows enumeration

SMB on 139 vs 445: Diagnose Session Differences

October 24, 2026February 27, 2026 by Kioptrix Labs
SMB null session port 139 vs 445

Compare SMB behavior on ports 139 and 445 using the same target, client, identity and operation. Preserve transport context and the first failure before attributing different results to dialect, signing or access policy.

Categories Kioptrix Series Tags kioptrix, pentesting labs, SMB, Troubleshooting, Windows Networking

SMBMap Logon Failure: Username, Domain and Test Budget

October 24, 2026February 26, 2026 by Kioptrix Labs
smbmap NT_STATUS_LOGON_FAILURE

Diagnose SMBMap logon failures with one approved account, explicit username and domain inputs, and an attempt ceiling. Use the comparison record to preserve changed conditions without turning formatting checks into credential guessing.

Categories Kioptrix Series Tags Active Directory, pentesting, SMB, Triage, Windows Authentication

SMBMap Shares Listed but Access Denied: Identity Checks

October 24, 2026February 25, 2026 by Kioptrix Labs
SMBMap access denied

Review SMBMap access denial with the accepted session identity and exact operation recorded. Distinguish share discovery from file access, retain guest-mapping uncertainty and keep write-permission checks within the agreed scope.

Categories Pentest for Founders Tags Pentesting playbooks, Samba, SMB troubleshooting, SMBMap, Windows file share permissions

Nuclei Templates: Selection, Matchers and Validation

October 24, 2026February 24, 2026 by Kioptrix Labs
Nuclei template tuning

Review Nuclei selection filters and matcher logic with pinned engine and template revisions. Use positive and negative fixtures to examine match behavior, then distinguish a template hit from independently verified vulnerability evidence.

Categories Pentest for Founders Tags DevSecOps, Nuclei, Security Automation, Template Tuning, vulnerability scanning

Chisel vs Ligolo-NG: Traffic and Deployment Criteria

October 24, 2026February 23, 2026 by Kioptrix Labs
Chisel vs Ligolo-NG

Compare Chisel and Ligolo-NG from the traffic, DNS path and deployment permissions your task requires. Use the traffic contract to test representative permitted flows and record operational ownership, limits and recovery.

Categories Pentest for Founders Tags network tunneling, penetration testing, Pivoting, port forwarding

Ligolo-NG Tunnel Troubleshooting: Routes, NAT and DNS

October 24, 2026February 22, 2026 by Kioptrix Labs
Ligolo-NG setup guide

Troubleshoot Ligolo-NG by locating the first failing hop across the control channel, routes, destination service and DNS path. Retain installed versions and one narrow permitted connection before adding routes or tunnel hops.

Categories Pentest for Founders Tags Kali Linux, NAT Troubleshooting, Network Pivoting, penetration testing, Red Teaming

Vulnerability Disclosure Intake: Reporting Routes and Policy Review

October 24, 2026February 21, 2026 by Kioptrix Labs
Vulnerability Disclosure Policy

Prepare vulnerability-disclosure intake with a monitored reporting route, an owner and a publication review. Use the record to separate contact-file checks from policy scope, response commitments and authorization to test.

Categories Practice Labs & Tools Tags cybersecurity, SaaS security, security.txt, vulnerability disclosure

How to Read a Pentest Report: Evidence and Next Actions

October 24, 2026February 20, 2026 by Kioptrix Labs
how to read a penetration test report

Read a penetration-test finding through affected assets, evidence, prerequisites and confidence. Use the action card to separate demonstrated impact from assumptions, assign an owner and define a remediation acceptance check.

Categories Pentest for Founders Tags cybersecurity, enterprise sales, penetration testing, risk management, SaaS security
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