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My production web apps are down right now because the pages have become inaccessible due to net::ERR_CERT_DATE_INVALID errors. The root cause points to incorrectly configured TLS certificates on the Web Services tier. The Application Gateway reports all backend pools in Healty Status Here is what I need in very short order: • Diagnose and correct the TLS bindings for every Web Service so that browsers load each site without error. • Validate the certificate chain and SNI settings on the Application Gateway and propagate any required fixes. • Confirm that AD B2C callbacks and custom domains present the right certificate and handshake cleanly. • Walk me through the changes in Azure Portal / Azure CLI or ARM so I can repeat the process at the next renewal. I will accept the work when all sites load over HTTPS with no certificate warnings, A-grade results show in SSL Labs, and traffic flows normally through the gateway. If you live inside Azure Key Vault, App Gateway, Front Door, and AD B2C every day, this should be straightforward. I can grant RBAC access immediately so we can get the business back online.
Project ID: 40640383
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68 freelancers are bidding on average $23 USD/hour for this job

Dear , We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in Troubleshooting, Network Administration, Web Services, Infrastructure Architecture, Microsoft Azure, Network Security, Web Application, System Administration and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
$25 USD in 5 days
7.1
7.1

With my extensive experience of 14 years in systems and IT administration alongside my multiple certifications, I’m confident in my ability to promptly identify and resolve your Azure TLS configuration issues. Having immersed myself within Azure Key Vault, App Gateway, Front Door, and AD B2C almost daily, I am well-versed in the intricacies of managing these platforms adeptly. My proficiency also extends to working with Cloud Computing platforms like AWS and diverse DevOps tools such as Jenkins, Bitbucket, Github, Terraform, Ansible, Python. As a result, I can execute all the necessary actions through the Azure Portal or CLI with ease and clarity. Additionally, my dedication to thoroughness ensures that I’ll address every aspect required for this project. Rest assured that once I've worked on your TLS bindings and validated certificate chains and SNI settings on the Application Gateway – AD B2C callbacks will work smoothly with custom domains presenting the appropriate certificates. Over the years, I have built an ingrained habit of not considering a project complete until it's achieved an A-grade SSL Labs rating and normal traffic flow. Let me help you navigate this hurdle so you can get your business back on track swiftly.
$30 USD in 40 days
6.3
6.3

I can help with this right away. This looks like a focused Azure TLS/App Gateway certificate issue rather than a vague debugging job, and I’m comfortable tracing bindings, SNI, chain validation, and AD B2C/custom domain certificate presentation. I can diagnose the breakage, apply the fixes, and then walk you through exactly what changed in Azure so you can repeat it at renewal time. If RBAC access is ready, I can start as soon as you assign it.
$20 USD in 40 days
5.7
5.7

★★★ AZURE SPECIALIST ★★★ Hi, I can fix TLS certificate issues for your web apps. I will diagnose and correct the TLS bindings for every Web Service. I will also validate the certificate chain and SNI settings on the Application Gateway. After that, I will confirm AD B2C callbacks and custom domains have the right certificate. I will walk you through the changes in Azure Portal or Azure CLI so you can repeat the process. Let’s get your sites loading over HTTPS with no errors. Please reply to discuss more. Thanks!
$25 USD in 40 days
4.6
4.6

I understand that you need more than just a quick fix; my approach to work aligns with the value you uphold. I do not subscribe to generic template sites or band-aid solutions. Instead, I focus on building lasting solutions that not only solve the immediate issue at hand but also provide you with a thorough understanding of the process for future reference, allowing you to repeat it with ease. With me onboard, you can expect end-to-end accountablility: from diagnosing and correcting TLS bindings to validating certificate chains and SNI settings on Application Gateway. Furthermore, I'll ensure AD B2C callbacks and custom domains navigate the handshake process successfully. My working style emphasizes clean, maintainable engineering that prioritizes security, site speed, structured workflows as well as regular communication and reliable delivery. Ultimately, my aim is to empower your business for long-term success. This means developing solutions that not only fix your current problem but also scale easily as your operations grow. Let's leverage my skills in infrastructure optimization and automation to get your production web apps back up running at peak performance as soon as possible!
$25 USD in 40 days
4.0
4.0

Hi, I can help you resolve the net::ERR_CERT_DATE_INVALID errors on your production web apps quickly. I have extensive experience troubleshooting Azure TLS configurations, including correcting TLS bindings and validating certificate chains and SNI settings in Application Gateways. In a previous project, I successfully fixed similar TLS issues, ensuring all sites loaded securely over HTTPS with A-grade SSL Labs results. I’ll walk you through the changes in the Azure Portal or CLI so you're equipped for future renewals. I can complete this in $[Price] within 2 days. Are you able to provide access for RBAC right away?
$16 USD in 40 days
3.2
3.2

I can help restore the HTTPS path across your Azure environment quickly and methodically. I will focus on the TLS bindings for each Web Service, validate the certificate chain and SNI configuration on Application Gateway, and verify AD B2C custom domains and callbacks so the handshake is clean end to end. I’ll also trace the certificate presentation from Key Vault through App Gateway and any web app bindings to identify exactly where the incorrect certificate is being served. You’ll receive clear steps for Azure Portal, Azure CLI, or ARM so the renewal and rebind process can be repeated reliably next time. I’ll prioritize getting all sites back to serving over HTTPS without browser warnings, then confirm the gateway and backend traffic are stable. I’m ready to work immediately once access is granted.
$15 USD in 36 days
3.3
3.3

Hi, I can diagnose and resolve the TLS binding issues for each of your web services. I will also verify the certificate chain and SNI settings on the Application Gateway to ensure proper loading without errors. Additionally, I will confirm that AD B2C callbacks and custom domains are functioning seamlessly. After that, I’ll walk you through the changes on the Azure Portal and Azure CLI, ensuring you can replicate the process in the future. With over 5 years of experience working with Azure services, I’m confident I can get your sites up and running securely again. Let’s get your business back online! Best Regards, Priyanka
$20 USD in 40 days
3.4
3.4

Your production sites can be restored by tracing the client-facing TLS path separately from the Application Gateway backend health, since healthy pools do not confirm that browsers receive the correct certificate. I’ll begin by inventorying every Web App custom domain and TLS binding, checking certificate expiry, thumbprints, hostname coverage, intermediate chain, and SNI behavior. I’ll then verify the Key Vault certificate version and permissions, correct bindings or renewals, and validate the Application Gateway listeners, HTTPS settings, probes, and backend HTTP settings. I’ll also test the AD B2C custom domains and callback endpoints to confirm the expected certificate and clean handshake, then use browser checks and SSL Labs to verify that every site loads without warnings and reaches an A-grade result. After traffic is stable, I’ll provide a concise Azure Portal and Azure CLI/ARM runbook covering certificate renewal, Key Vault updates, RBAC, listener configuration, and propagation checks so the next renewal is repeatable. I can start immediately once RBAC access is granted. Are all affected sites hosted as Azure App Services behind the same Application Gateway? Muhammad Saad
$20 USD in 40 days
3.2
3.2

Hi, I can troubleshoot and fix the Azure TLS configuration and get the production applications back online quickly. I have 10+ years of cloud/DevOps experience across Azure, AWS, networking, SSL/TLS, DNS, and production infrastructure. I can work directly with Azure Application Gateway, Key Vault, App Services/Web Apps, Front Door, and AD B2C to identify where the certificate chain or binding is failing. I would: Diagnose the ERR_CERT_DATE_INVALID issue and identify the incorrect/expired certificate. Review Web App TLS bindings and custom-domain certificates. Validate Application Gateway listeners, backend HTTPS settings, SNI, and certificate chains. Check Key Vault certificates/secrets and their access/RBAC configuration. Validate AD B2C custom domains and callback HTTPS handshakes. Thanks
$25 USD in 40 days
3.0
3.0

Hi, your production outage is clearly coming from broken TLS bindings on the Web Services tier, not the gateway health checks. I understand the goal is to restore clean HTTPS across every site, keep AD B2C callbacks working, and make the fix repeatable at renewal. I’ve handled Azure SSL issues across App Service, Application Gateway, Key Vault, and custom domains, including certificate chain validation, SNI alignment, and browser-side certificate errors. I’d start by checking each site’s certificate binding, then validate the full chain and hostname/SNI settings on the gateway and any AD B2C redirect URIs. After that I’ll test the end-to-end handshake, confirm SSL Labs results, and document the exact Azure Portal, CLI, or ARM steps so you can repeat them next time. If you want, I can begin immediately and get this stabilized. Best regards, Gabriel
$25 USD in 38 days
2.0
2.0

Hi, The `ERR_CERT_DATE_INVALID` error while App Gateway reports healthy backends usually points to an expired SSL/TLS certificate bound to the HTTPS listener or Key Vault secret version mismatch, rather than a backend pool issue. I can hop on immediately, check your App Gateway listeners and Key Vault integration, update the bindings across your Web Apps and AD B2C custom domains, and verify the full handshake chain to restore your production sites right away. Once resolved, I’ll document the process so your team can handle future renewals seamlessly. Are your listener certificates set up with Key Vault auto-rotation, or are they manually uploaded PFX files? Let's connect and get this fixed now. Best Regards Team Solutionzhere
$30 USD in 40 days
2.0
2.0

Hi there, I understand you need an urgent Azure TLS fix for production sites currently failing with net::ERR_CERT_DATE_INVALID, with the issue likely sitting across the Web Services, Key Vault, Application Gateway and custom-domain layers. I am confident I can diagnose the certificate chain and bindings end-to-end and restore clean HTTPS traffic without disrupting the healthy backend pools. My approach is to first trace certificate expiry, bindings and SNI across each Web Service and Application Gateway listener, then validate the Key Vault certificate/version references and backend HTTPS configuration. I’ll also verify AD B2C callback/custom-domain certificates and complete external handshake checks after the changes. Once stable, I’ll document the exact Azure Portal, CLI or ARM steps used so future certificate renewals can be repeated reliably. I’ve worked with Azure infrastructure, TLS/SSL configuration, Application Gateway, Key Vault, web services and authentication integrations where production availability and secure certificate handling are critical. Are the certificates currently managed through Azure Key Vault, App Service certificate bindings, or a combination of both? I’m ready to start immediately and focus first on getting the production sites back online. Warm Regards, Aneesa
$15 USD in 40 days
1.8
1.8

Hello! Allen from Fort Worth here⚡ Previous Work: https://www.freelancer.com/projects/database-administration/Optimize-Zen-Cart-SQL-Queries https://www.freelancer.com/projects/dovecot/Migrate-Legacy-Linux-Platform https://www.freelancer.com/projects/email-marketing/Stop-BlueHost-Email-Spam Healthy backend pools alongside ERR_CERT_DATE_INVALID is the clue. Those are two separate certificate paths — probes validate gateway→backend, not the frontend listener the browser hits. So the expired cert is on the listener, and the gateway is cheerfully proxying to healthy pools behind it. That also narrows the cause. If App Gateway can't reach the vault or find the cert, it disables the listener outright — you'd see connection failures, not a date error. You're getting a served-but-stale cert, which points at a versioned Key Vault secret URI pinning the listener to the old cert. Microsoft Learn The trap on the fix: reapplying the same versionless URI, or running an empty az network application-gateway update, returns success without pulling the newer version. The working sequence is to point the listener at the latest versioned secret URI, then set it back to versionless — that's a real keyVaultSecretId change, so it forces the refetch while preserving autorotation. Microsoft Learn CLI commands documented as I run them. Available now. $70/hr, 10 hours to green. Best, Allen.
$70 USD in 10 days
1.4
1.4

Hi there, To resolve the net::ERR_CERT_DATE_INVALID errors on your Azure web apps, I will start by diagnosing the TLS bindings and the certificate chain settings on the Application Gateway. I’ll ensure the correct SNI settings are applied so that all sites load without errors. After fixing the issues, I'll walk you through the necessary changes in the Azure Portal or via Azure CLI so you can repeat the process in the future. Your satisfaction is paramount, and I guarantee that I will deliver a high-quality result. Regards, Ali
$15 USD in 1 day
0.4
0.4

Hi, I see your Azure web apps are throwing net::ERR and are completely down. I'll start by checking the TLS/SSL certificate bindings in the Azure portal, then verify the custom domain DNS records and App Service configuration to pinpoint whether it's a certificate renewal issue, a binding mismatch, or a protocol version problem. I've debugged similar Azure outages where certificate auto-renewal failed or TLS settings got reset during a deployment. I'll pull diagnostics logs from App Service and trace the exact error to get your apps back online quickly. I can start immediately and will keep you updated every step of the way. Best regards, David
$15 USD in 2 days
0.0
0.0

Hello, I can quickly diagnose and fix your Azure TLS certificate issues to restore HTTPS access across your production web apps. I can handle: • TLS certificate binding fixes on Web Services • Certificate chain and SNI validation • Azure Application Gateway configuration checks • Key Vault certificate integration • AD B2C custom domain and callback validation • SSL/TLS testing and deployment guidance I have experience with Azure infrastructure, networking, security, App Gateway, Key Vault, and production troubleshooting. I will provide clear steps through Azure Portal/CLI so the renewal process can be repeated easily. Ready to start immediately. Kind regards Juan
$20 USD in 40 days
0.0
0.0

Production downtime traced to net::ERR_CERT_DATE_INVALID indicates a TLS/certificate issue on the Azure Web Services tier. I’ll quickly diagnose and remediate by correcting TLS bindings for every Web Service, ensuring the Application Gateway forwards with the expected SNI and certificate chain. I’ll validate the end-to-end handshake path: certificate validity, chain trust, hostname/SNI matching, and backend pool behavior, then confirm AD B2C callback endpoints and custom domains present the right certificate without browser warnings. Finally, I’ll document the exact Azure Portal / Azure CLI / ARM steps used (including renewal-safe patterns and where to verify Key Vault, App Gateway, and domain bindings) so you can repeat the process at the next renewal. Acceptance criteria: all sites load over HTTPS with no certificate warnings, SSL Labs A-grade results, and normal traffic flow through the gateway.
$20 USD in 47 days
0.0
0.0

Hi Cary, You need the TLS bindings on each Web Service fixed so browsers stop showing net::ERR_CERT_DATE_INVALID and the App Gateway SNI and certificate chain validated. I will list each Web Service, pull its current TLS configuration via Azure CLI, compare the bindings to the expected certificates, update the bindings and SNI settings on the Application Gateway, then verify AD B2C callbacks and custom domains using SSL Labs and Azure diagnostics. I recently resolved a similar TLS issue for a production Azure environment, delivering clean certificates and A‑grade SSL results. I provide an upfront estimate, proactive updates, thorough testing, and clear handover notes. Will the services use Azure Key Vault for cert storage, and do you have a preferred CLI or ARM template format? Can you confirm the resource group names for the Web Services and the App Gateway? Looking forward to restoring your sites.
$20 USD in 20 days
0.0
0.0

The net::ERR_CERT_DATE_INVALID errors show your TLS configuration is broken, and I can fix that. I will use Azure CLI to diagnose the TLS bindings on your Web Services tier, checking the certificate expiration dates and SNI settings. I will then correct the bindings to restore browser access. For the Application Gateway, I will validate the certificate chain and SNI settings there too, making necessary adjustments and propagating them. I will also confirm AD B2C callbacks and custom domains are presenting the correct certificates and handling handshakes properly. I would not suggest simply replacing the certificate without a full diagnostic first, as that often hides the real issue and leads to repeat failures. I see the brief mentions AD B2C callbacks, will the custom domains also need their own separate TLS configuration or is it inherited from the main domain? 8 reviews on here, everything delivered on time and on the agreed price so far, plus Preferred Freelancer status. Let's have a short call on Freelancer to go over the diagnostic findings and the exact Azure CLI commands I'll use to apply the fixes.
$25 USD in 7 days
0.0
0.0

Cary, United States
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