DNS Issue (SERVFAIL / No Reachable Authority) – BIND + OVH

@sabdsouza

As someone who has extensively worked with OVH infrastructure and understands the ins and outs of BIND DNS, I am confident in my abilities to resolve your DNS issue on the dedicated server. My prior experiences have taught me how interconnected the DNS configurations are and I understand the gravity of the problem you're facing with SERVFAIL and No Reachable Authority errors. I will provide a precise and thorough diagnosis of your network, routing or DNS related issue. In addition to testing from multiple external networks to ascertain if there are any inconsistencies in reachability, I will also dive deep into analysing OVH networking and failover IP behavior for a comprehensive understanding of the problem. My troubleshooting skills and system admin experience allow me to operate with efficiency and accuracy when handling issues like packet loss, which seems to be part of your challenge. My goal is not just the restoration of stable global DNS resolution but also ensuring that this kind of problem doesn't happen again in the future. Choose me for a conscientious approach that aims to find permanent solutions for your business.

@bindmission

Hello, I have 10 years of experience in network management and DNS troubleshooting. I specialize in working with BIND DNS servers and have deep knowledge of OVH infrastructure. I can diagnose and resolve your DNS issue by analyzing network reachability and failover IP configurations. I will ensure your DNS resolution becomes stable and accessible globally. My expertise includes DNS debugging and failover IP management. Regards, VishnuLal NB*

@servermaster

hi. i can troubleshoot and fix dns server issues. i have 20 years of experience. please have a look of my profile for reviews and work done

@farooqtahir2013

As someone with a decade of experience as a Network, Cybersecurity, VoIP, and System Engineer, I'm confident I can quickly identify and resolve your DNS issue. My extensive background includes working with notable vendors like OVH, Cisco, and fortinet to ensure optimal network performance, making me familiar with the nuances of infrastructural complications that might be causing the DNS problem you're experiencing. Moreover, my proficiency with BIND DNS servers combined with my comprehensive understanding of troubleshooting SERVFAIL and delegation issues will enable me to diagnose the root cause of your problem accurately. Throughout my career, I've successfully tested DNS reachability from different external networks. This capacity proves beneficial in analyzing OVH networking and failover IP behavior contributing to the DNS anomalies you've noticed. In addition to my technical expertise, I'm known for being dependable and responsive. Should you choose me for this project, I assure you of 24/7 availability and quick turnaround time on resolving your DNS issue. Trust in my experience and commitment to delivering project success as I have done consistently over the years. Looking forward to hearing from you soon!

@talhamq

Hi I can help you to fix Bind issue as i already fixed OVH bind server issue. I have also good experience in DNS server setup and troubleshooting.

@AZTURK1

Hi there, I understand you have SERVFAIL / "No Reachable Authority" for zones served by BIND on an OVH dedicated server using a primary IP and an OVH failover IP. I have deep experience with OVH networking, BIND troubleshooting, and failover IP routing which makes me a fit to find whether this is routing, ARP, or DNS misconfiguration. - Diagnose root cause with packet captures (tcpdump), named query logging and dig traces from multiple global probes - Test reachability from external networks (RIPE Atlas / public probes) and verify AXFR/zone transfer, SOA/NS glue and port 53 TCP/UDP responses - Analyze OVH failover behaviour, check ARP/VRRP binding, routing, and recommend fix (reassign floating IP, update routes, or use VRRP) - Risk/quality control: staged fixes, post-fix validation from 10+ global vantage points, rollback steps and DNS TTL guidance to minimise downtime Skills: ✅ BIND ✅ OVH failover IP / networking ✅ tcpdump / dig / DNS debugging workflows ✅ Linux server administration / network interfaces ✅ Firewall, routing, availability and hardening Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I’m available to start immediately. Can you confirm whether the failover IP is configured via OVH's vRack or assigned as a plain failover, and whether you have console/KVM access to the server to run tcpdump and ifdown/ifup during testing? Best regards,

@versacode

We can assist with diagnosing and applying any necessary adjustments so that your domains resolve correctly. This includes testing external reachability via websites that provide ping ability from multiple different countries to ensure proper reachability. Experience: We have 18+ years of experience in system administration and network engineering. We are familiar with BIND and have used OVH for hosting previously.

@tech717

Hi, As you can see my Profile and Past work History, I have strong skills in DNS/Bind and OVH Cloud Hosting, as well as in Linux SysAdmin, I cam easily fix to your issue, Lets start now and discuss more details in Chat.. Thanks!!

@ArchnaAdmin

Hi, I have 8+ years of experience in DNS cofiguration, I will configure and manage all required DNS records to correctly connect your domain with the website, server, and email services. This includes setting up all records (A, CNAME, MX, SPF, DKIM, DMARC). The configuration will ensure proper domain resolution, secure website access (HTTPS), reliable email delivery, and smooth integration with hosting, CDN, or third-party services without disrupting existing functionality. All changes will be carefully tested and verified after setup. Please discuss your requirements so we can get started. Thank you

@android2014213

Hi, I can resolve DNS related issues. I am experienced in BIND and ovh hosting. Thanks Ashish A.

@linuxpro2008

Worked with all kind of servers and all panels since 2007 And currently working as linux system administrator If you need to start as soon as possible contact me And tell me more details about what you want to Tell the time and cost accurately, please contact me now, looking forward to work with you Best regards

@asimaarbi

I can fix the DNS issues on your OVH servers within a few hours. I have extensive experience with OVH infrastructure, BIND, and failover IP configuration. I will diagnose the root cause of the SERVFAIL errors, test DNS reachability from multiple external networks, analyze failover IP behavior, and apply the necessary fixes to restore stable global DNS resolution. I guarantee a fast and reliable approach to make your domains accessible from any network. :::

@softwarelinkerrs

With my extensive experience in Linux, Network Security, and Troubleshooting, I am well-equipped to tackle your DNS issue head-on. As the founder of SoftwareLinkers, I have helped numerous clients optimize their digital systems for improved scalability and stability, and I am confident that I can do the same for you. My ability to design reliable systems and understand the underlying causes of technical problems will be invaluable in diagnosing the root cause of your DNS issue. One aspect that sets me apart is my familiarity with OVH infrastructure and networking, which is central to your problem. Having worked with OVH extensively in the past, I have a deep understanding of their networking protocols and their behaviors, including failover IP configuration. This unique insight will allow me to pinpoint whether the problem is network, routing, or DNS-related. Clients work with me for my proven track record of high client retention and repeat hires, a 4.9-star rating with over 100 verified reviews, and a 96% job success rate. Additionally, my team comprises verified full-stack experts adept at troubleshooting and infrastructure management.

@najibe1

Hello, I’m an IT expert with over 20 years of experience in the industry. I hold certifications as a Cisco Certified Networking Professional (300-100 and 300-115), Linux Certified Professional (LPI 101, 102, 103), Red Hat Certified System Administrator, VMware Certified Professional (versions 4, 5, and 5.5), as well as being a Microsoft System Administrator/Engineer from 2003 to 2022 and AZ104

@sufyand1

With extensive experience in DNS troubleshooting, OVH infrastructure, and BIND server management, I am well-positioned to resolve your issue efficiently. I specialize in diagnosing SERVFAIL and delegation errors, allowing me to quickly identify and address root causes. My strong background in Linux server administration enables me to analyze OVH networking and failover IP behavior, ensuring accurate isolation of network, routing, or DNS-related problems and restoring stable global resolution. Additionally, I have proven experience deploying Django applications on cloud platforms such as AWS and DigitalOcean, aligning closely with your project requirements. I focus on delivering reliable, well-optimized solutions through a structured and automation-driven approach. I understand the urgency of your situation and would be glad to discuss the details to ensure a fast and effective resolution.

@ravikumarsingh1

This is not a typical BIND issue—your symptoms clearly point to a network-level problem (OVH routing / failover IP binding), not zone configuration. The key signals: Works locally but timeouts externally Packet loss on failover IP Public resolvers returning SERVFAIL (no reachable authority) That usually means DNS is unreachable from outside networks, so resolvers fail even if zones are correct. What I’ll do: 1. External Reachability Testing Test both NS from multiple networks (non-OVH vantage points) Verify TCP/UDP 53 accessibility and latency 2. OVH Network + Failover IP Debug Validate failover IP binding (IP alias vs correct routing setup) Check reverse path filtering (rp_filter), ARP behavior, and OVH-specific routing requirements Confirm correct gateway + MAC configuration for failover IP 3. BIND + Server-Level Checks Ensure named is listening on correct interfaces Verify recursion/authoritative settings aren’t interfering Confirm no rate-limiting or firewall edge cases 4. Root Cause Fix Correct routing or interface config (most likely cause) Stabilize DNS so both NS are globally reachable Deliverable: Fully working global DNS (no SERVFAIL) Root cause explanation (network vs config) Clean, documented fix so it doesn’t recur I’ve handled OVH failover IP issues before—this is almost always routing/ARP misconfiguration, not DNS itself. Can start immediately and resolve quickly.

@setu307

I can diagnose and fix your global DNS failures on OVH, including SERVFAIL and unreachable authority issues across both nameservers. Your description points to a network-level or routing problem affecting the main IP and the OVH failover IP, not just BIND configuration. I have extensive experience with OVH networking, routing rules, failover IP behavior, and BIND-based authoritative DNS setups. Here’s what I will do: • Run full external reachability tests on both nameserver IPs from multiple networks and global resolvers. • Analyze failover IP routing, ARP behavior, and OVH’s virtual MAC requirements to confirm whether packets reach BIND at all. • Inspect network configuration, firewall rules, sysctl parameters, and any OVH-specific routing constraints that may cause intermittent accessibility. • Validate zone delegation paths end-to-end and confirm authoritative responses externally. • Fix any issues found—whether related to routing, interface binding, BIND configuration, or OVH failover IP assignment. • Provide a full summary of root cause and the permanent solution. I’m ready to begin immediately once you provide SSH access.

@artur1992123

Before you hire anyone. read this. the real issue is likely not the zone files, but external reachability to your authoritative NS from non-OVH networks. I'd start with public-path testing - trace/routing checks, failover IP validation, named listen/bind review. delegation consistency to isolate whether this is OVH network, reverse path, or BIND exposure. I'm Artur, full stack developer since 2011. I can help with a fast, careful fix at a symbolic price to earn a good review here, while still delivering quality work. And if access is ready, I can begin immediately and keep the process practical: verify, isolate, fix, retest globally.

@novalitztech

Hi, I see you're dealing with a DNS issue where your domains are failing globally with a SERVFAIL error. It looks like you've done a solid job checking the basics, like BIND configuration and glue records. My approach would be to dig deeper into the networking aspect, specifically focusing on the failover IP behavior and any potential routing problems. With my experience in managing BIND DNS servers and OVH infrastructure, I can help diagnose the root cause of the issue. I’ll conduct tests from various external networks to pinpoint where the breakdown is happening. By analyzing the networking setup, we can determine if the problem lies within the DNS configuration or if it's a broader network issue. I pride myself on providing clear and effective solutions while maintaining open lines of communication. Let’s work together to restore stable global DNS resolution for your domains. Best regards, Novalitz Tech