Harden SOAP API Access Control

@onkarkulkarni8

Hi, I can help you with "Harden SOAP API Access Control" as per your given project description. We can discuss more in detail during a chat conversation when you are available. I've worked on many PHP projects in recent times. So I am confident on achieving your expected Goals. Please initiate a communication thread to discuss further and start with the project. ⭐ 5.0/5 from a recent client: "A more professional version: “Excellent work! The job was completed within the committed timeline. Great quality, professionalism, and timely delivery. Highly appreciated and recommended.”" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.

@jayantkumar314

Hi,I can review and harden your existing SOAP API while preserving compatibility for legitimate clients.I would start with an audit of the current WSDL/endpoints, Basic Authentication flow, transport security, server configuration and authorization boundaries. Based on those findings, I’ll recommend the most appropriate security model rather than forcing a specific authentication mechanism before reviewing the existing integration.

@Hrolgar

Swapping Basic Auth for mTLS is the direction I'd push first, ahead of WS-Security headers on their own, because Basic Auth over the wire is the actual hole and a client cert requirement kills credential stuffing and replay in one move instead of adding another header for the server to validate. I'd start by pulling the WSDL and current auth flow apart, mapping every exposed operation, then building the hardened path in staging alongside the existing one so nothing breaks mid switch. For the audit half I'd check transport (TLS version and cipher suite), auth (Basic Auth exposure, any credential reuse across environments), and request validation (XML injection, entity expansion, oversized payloads). Then the hardening itself, mTLS with a proper cert rotation story, or OAuth token auth if that fits your client base better, plus WS-Security signing on the message body so a compromised transport layer isn't the only thing standing between an attacker and the API. Every change gets a bash or curl based verification script so your team can reproduce the exact checks against production without needing me back in the loop. M1: audit plus threat model, 10519 INR, 2d. M2: mTLS or OAuth implementation in staging, 10678 INR, 2d. M3: WS-Security hardening, verification scripts, deployment notes, 10678 INR, 2d. Is there an existing CA or cert management process I should build the mTLS rotation around, and are there downstream SOAP consumers outside your control that a hard auth cutover would break?

@matiasdesousa

Hi, A couple of questions before we begin: 1. Is the API currently exposed directly to the internet, or is it behind a reverse proxy/API gateway? 2. Do you already have clients consuming the API that we need to keep fully compatible during the upgrade? I'll start by reviewing the WSDL, authentication flow, server configuration, TLS setup, and exposed endpoints, then provide a practical security report with prioritized recommendations—not just a list of vulnerabilities. After we agree on the best approach, I'll implement the improvements (WS-Security, mTLS, OAuth/token-based authentication, or whichever solution best fits your environment), validate them with security testing, and make sure legitimate traffic continues to work normally. My goal is simple: make the API significantly harder to attack while keeping it easy for authorized clients to use. Looking forward to collaborate on this. Best, Rui

@buttphool6991

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@rimiloca

I would start with the WSDL, authentication path and hosting configuration, then agree a hardening approach compatible with your existing SOAP clients. The work would include a concise findings report, staging implementation, tests for unauthorized and legitimate requests, and deployment/rollback notes. I would also check XML parsing, exposed errors and rate limits. My quote is ₹30,000 over 10 days for this API; the exact controls follow the initial review, rather than adding OAuth or encryption without checking client support. Which SOAP framework and server are in use?

@erincguray

Greetings I am Erinc I am a Web Developer since 2020 knowledgeable in PHP and Web Security. I can confirm I will provide the Harden SOAP API Access Control you're looking for strictly under your budget. I am available to start right now and regularly on desk everyday. Looking forward to hear from you. Thanks for your consideration.

@huzaifaa177

I can audit and harden your publicly exposed SOAP API without disrupting legitimate integrations. I’ll first review the WSDL and endpoints, authentication and authorization flow, TLS/server configuration, SOAP headers, input validation, error handling, exposed services, and relevant hosting configuration to identify realistic attack paths. Based on the findings, I’ll recommend the appropriate layered controls, which could include WS-Security with signed/encrypted messages, mutual TLS, stronger token-based authentication, OAuth where appropriate, request validation, rate limiting, replay protection, and strict TLS/API access policies rather than adding mechanisms that do not fit the existing architecture. After the approach is agreed, I’ll implement and validate the changes in staging, including authorized/unauthorized request testing, authentication bypass attempts, malformed SOAP/XML testing, TLS verification, and security scanning. I’ll provide a concise vulnerability report with severity and remediation details, deployment and rollback instructions, configuration documentation, and reproducible verification scripts. To plan the implementation accurately, can you confirm the SOAP framework/runtime, hosting environment, current TLS configuration, and whether existing clients can support WS-Security or mutual TLS without requiring major changes?

@rohank2502

Your public API sits on the open internet with only a simple password. That is a thin lock. I will list every crack, then put stronger checks in so strangers are turned away and real customers keep flowing. I can start right now. In 24 to 48 hours you get a live sample on a test copy: tighter login, a short hole-list, and a proof that blocked requests stay blocked. Then I finish the copy-to-live notes so you can repeat the same setup without surprises. Share the API details and test-copy access so I can start the sample today?

@rakhshanz3

As a seasoned professional with nearly two decades of experience, proficiency in multiple programming languages including PHP, and a specialization in API development and security, I believe I am the ideal candidate to address your API hardening concerns. My extensive background extends from lecturing on computer science to leading AI-based tech start-ups, which have all contributed immensely in honing my problem-solving skills. My career path has also given me a deep understanding and practical grasp of building and protecting systems at scale. Throughout my career, I have focused on delivering secure systems while never compromising performance or user experience. This is especially important when dealing with APIs since they are the backbone of any application's functionality. In conjunction with my technological prowess is my commitment to detail and delivery. I assure you that I will carry out an extensive audit of your existing setup, expertly identifying vulnerabilities before suggesting and implementing robust mechanisms to resolve them.

@thomasken111

Hi, I can help audit and harden your publicly exposed SOAP API without disrupting legitimate integrations. I’ll first review the WSDL, endpoints, current Basic Auth flow, application code, server configuration, TLS setup, and request/response handling to identify authentication, authorization, transport, and message-level weaknesses. Based on the existing architecture, I’ll recommend the most appropriate approach—such as WS-Security, mutual TLS, OAuth/token-based authentication, stronger TLS configuration, request validation, rate limiting, or a combination where justified. I’ll implement the agreed changes in staging, test both authorized and unauthorized requests, and verify that existing clients continue to work. You’ll receive a concise security audit, deployment instructions, verification scripts, and clear test results that can be reproduced in production. Could you share the current WSDL and authentication flow so I can determine whether message-level security, mTLS, or token-based authentication is the best fit for your existing clients? I’m ready to start once access is provided. Best regards, Antonio

@mykolas67

Hii! You are lucky, or I am! I have experience securing public APIs, authentication flows, SOAP services and server configurations. I understand you need a security audit of the existing SOAP API first, followed by practical hardening without breaking legitimate integrations. I’ll review the endpoints, Basic Auth implementation, transport/security configuration and attack surface, then recommend the right combination of WS-Security, mTLS, token/OAuth or message-level protection. I’ll provide an actionable audit report, implement the approved controls in staging, test unauthorized/authorized requests, and deliver deployment notes plus verification scripts for production. Share the WSDL and current architecture, and I can start with the security assessment.

@gta24596

Protecting your API is of utmost importance and I am equipped with the necessary skills to tighten the security of your SOAP API. With my extensive background in Computer Security, Incident Response, Internet Security, and Web Security, I possess a comprehensive understanding of potential vulnerabilities and how to address them effectively. In my previous projects, I’ve executed successful OAuth integrations and performed thorough security audits resulting in enhanced protection. Drawing from this experience, I will conduct a meticulous analysis of your existing endpoints, auth flow, and server configuration to identify any possible loopholes before implementing appropriate counter-measures. Furthermore, as a Shopify and WordPress specialist, I am well-versed in implementing secure APIs including WS-Security headers, message-level encryption, mutual TLS, token-based or OAuth authentication. After deploying these measures in a staging environment, I will provide you with comprehensive deployment notes and verification scripts so that you can easily reproduce the setup in production. Together, we will ensure clean security-scan results while allowing legitimate traffic to flow without interruption. Trust me to provide an ironclad shield for your SOAP API!

@fernandom000

I run FCyberSecurity LLC (NY-based, real client vulnerability assessments and pentesting). This is a clean, well-scoped fit. My approach: 1. Audit: review the WSDL, endpoints, and current Basic Auth flow for the obvious risks first (credentials sent per-request, no replay protection, TLS-only reliance, verbose SOAP faults leaking internals) plus deeper checks (XML injection, XXE, WS-Addressing spoofing). 2. Recommendation: for a SOAP service still needing broad client compatibility, WS-Security (UsernameToken with digest + timestamp, or X.509 signing) is usually the right fit over full OAuth migration unless your clients are already token-capable — I'll confirm which fits your consumers before implementing, with mutual TLS as a strong complementary layer. 3. Implementation in staging, then a verification pass (automated security scan + manual replay/tamper tests) before handoff. 4. Deliverables: written audit report, hardened staging environment, deployment notes + verification scripts so your team can reproduce it in production. Happy to start with a quick review of the WSDL/endpoint once access is granted, and confirm the exact hardening approach before implementing anything.

@eternitech

Hi, New on Freelancer — 20 years of development experience behind us. We're taking our first few projects here at a fraction of our normal rate purely to build our review history. You get senior agency work at junior pricing; we get a review. Straight trade. To enhance your SOAP API's security, implementing OAuth 2.0 can provide a significant upgrade over Basic Authentication by offering token-based access control. My initial step would be to conduct a penetration test to identify any existing vulnerabilities. Can you provide access to your API documentation so I can assess the current setup?

@karthikresonite

Dear Client, At Resonite Technologies, we specialize in securing APIs and have a proven track record in implementing robust security measures. We understand the critical importance of fortifying your publicly facing SOAP API beyond Basic Authentication. Our approach will begin with a thorough assessment of your existing endpoints, authentication flow, and server configuration. We will identify all potential vulnerabilities and provide a detailed audit report outlining our findings and recommendations. Following your approval, we will implement enhanced security measures tailored to your needs, which may include WS-Security headers, message-level encryption, mutual TLS, or transitioning to token-based or OAuth authentication. We will conduct all tests in a staging environment to ensure that legitimate traffic remains uninterrupted while unauthorized access is effectively denied. Additionally, we will provide comprehensive deployment notes and verification scripts for smooth implementation in your production environment. We look forward to collaborating with you to secure your API. Best regards, Karthik B Resonite Technologies

@JoseRCarvas

Basic Auth on a public SOAP endpoint means the credentials ride on every call, and a single captured request can be replayed forever. No message integrity, no expiry. That is the core gap to close. Approach: 1) Audit the endpoints, WSDL, auth flow and server/TLS config; document each concrete weakness (replay, credential exposure, weak transport, SOAP faults leaking internals). 2) Implement the right layer for your case: WS-Security (UsernameToken with nonce+timestamp, or X.509 signing), message-level signing/encryption, mutual TLS, or a move to short-lived token/OAuth2. I state the trade-offs so you decide knowingly. 3) Add nonce+timestamp to kill replay, tighten TLS, sanitise faults. Deliver: an audit report, hardened and tested endpoints, and a short auth guide for your API callers. I build in PHP and will stand up a local SOAP service to validate the WS-Security/mTLS/token flow before anything touches production, so live traffic is never at risk. After a milestone is funded I start with the audit so you see findings early. Two questions: which SOAP stack (PHP native SoapServer, or a framework)? And are there callers whose request format cannot change? Rating: 5.0 stars. - Ricardo

@VutomiM1

I recently secured a publicly facing SOAP API for a healthcare client, where I identified vulnerabilities and implemented robust measures, resulting in zero unauthorized access attempts post-deployment. With over five years of experience in API security, I specialize in threat assessments and implementing layered security strategies. My expertise directly aligns with your project requirements, ensuring a comprehensive hardening of your API. I understand your goal is to fortify your SOAP API against unauthorized access while maintaining seamless legitimate traffic. I will conduct a thorough audit of your current setup, identify vulnerabilities, and implement solutions like WS-Security headers and OAuth authentication, tailored to your needs. My focus is on execution, clear communication, and ensuring long-term security success for your API. Let's ensure your API is secure and resilient against threats. The difference between an average result and an exceptional one is usually decided before the work even begins. Regards, Vutomi

@ProofFirstEng

Your SOAP API needs a staged, authorized hardening pass that blocks unauthorized requests without breaking known-good clients. I’ll first review the WSDL, endpoints, Basic Auth flow, server/TLS configuration, and current request handling, then produce a named verification matrix for authorized and unauthorized cases. After written approval, I’ll implement one control path supported by the existing stack—mTLS, WS-Security, or a gateway token/OAuth approach—run regression and negative-access checks, and deliver verification scripts plus deployment and rollback notes. My relevant proof is deterministic testing of security-sensitive code: my independent Vyper verification lab completed 37,230 oracle-checked executions across optimizer modes and EVM backends. I won’t imply prior SOAP/OAuth migration experience I cannot evidence; I’ll report tested configurations and limits precisely. ₹25,000 over 7 days in two funded milestones. Scope requires written authorization, staging, test credentials, WSDL/code/config, runtime versions, and a known-good client request. Production scanning or cutover, emergency response, broad penetration testing, third-party fees, multiple authentication schemes, and any guarantee that no vulnerability exists are excluded. “Clean scan” acceptance will be replaced by agreed named checks and a client-supplied compatibility list. Which application server or framework hosts the SOAP service, and which clients must remain backward-compatible?