免费、快速的 DNS、电子邮件身份验证和网络安全诊断工具。
Free, fast diagnostic tools for DNS, email authentication, and network security

原始链接: https://mrdns.com/

Mr.DNS 提供一套全面的免费在线工具，用于诊断和管理 DNS、网络连接和电子邮件身份验证。 **DNS 和 IP 工具**包括 DNS 查询、传播检查、DNSSEC 验证、Whois 域名/IP 详细信息，以及识别您的公共 IP 地址。**网络工具**提供 ping、traceroute、端口检查、黑名单/RBL 检查，以及 SSL 证书/HTTP 标头分析，同时支持 HTTP/2 和 HTTP/3 协议支持测试。对于 **电子邮件工具**，Mr.DNS 提供 SPF、DKIM 和 DMARC 记录的检查——包括一个综合的“电子邮件健康检查”，提供等级和建议。它还具有分析电子邮件标头、验证 BIMI 记录以及生成器来帮助构建 SPF 和 DMARC 记录的工具。本质上，Mr.DNS 是一个资源，供开发人员、网络工程师和电子邮件管理员使用，以解决、保护和优化他们的在线基础设施。

## mrdns.com - 新诊断工具一个新的网站mrdns.com提供免费且快速的DNS、电子邮件认证和网络安全诊断工具。该网站在Hacker News上分享后，获得了积极的初步反馈，因为它全面覆盖了通常分散的记录类型，例如MTA-STS、BIMI、TLSA和CAA。用户很高兴这些工具集中在一个地方，与使用多个网站相比节省了时间。一位用户指出IPv6地址格式显示上存在轻微不一致（有时使用压缩格式'::'，有时不使用）。一个被要求的特性是添加可共享的永久链接，以简化报告和协作。总的来说，mrdns.com似乎是网络管理员和安全专业人员的宝贵资源。

DNS & Network Tools

Free, fast diagnostic tools for DNS, email authentication, network security, and more.

DNS Tools

DNS Lookup

Query A, AAAA, MX, TXT, NS, SOA, CNAME, PTR, CAA, SRV, TLSA, HTTPS, MTA-STS, BIMI and more. Results come directly from authoritative nameservers.

Look Up DNS Records

DNS Propagation Checker

Query 7 global public resolvers simultaneously to see whether your DNS changes have propagated worldwide.

Check Propagation

DNSSEC Checker

Verify the DNSSEC chain of trust. Check DS, DNSKEY, and RRSIG records to confirm cryptographic signing is properly configured.

Check DNSSEC

Whois

Look up structured RDAP registration data for any domain or IP — registrar, status, expiry dates, nameservers, and contacts.

Whois Lookup

Network Tools

My IP Address

Detect your public IPv4 and IPv6 addresses with geolocation, ISP name, and a live map.

View My IP

Ping

Send ICMP echo requests to any hostname or IP and see real-time round-trip times and packet loss statistics.

Ping a Host

Traceroute

Trace the network path hop-by-hop with real-time results and geolocation data for each router along the route.

Run Traceroute

Blacklist / RBL Check

Check an IP address or domain against 15+ major DNS-based blocklists in parallel.

Check Blacklists

SSL Certificate Check

Inspect SSL/TLS certificate details, expiry date, SANs, key info, and certificate chain for any hostname.

Check Certificate

HTTP Headers

View HTTP response headers and redirect chains. Highlights security headers and flags missing ones.

Check Headers

HTTP/2 & HTTP/3 Checker

Test whether a site supports HTTP/2 and HTTP/3. Checks ALPN negotiation, Alt-Svc advertisement, HTTPS redirect, and HSTS configuration.

Check Protocol Support

Port Checker

Test whether a TCP port is open or closed on any hostname or IP address. Grabs server banners for SSH, SMTP, FTP, and more.

Check a Port

Email Tools

Email Health Check

Get a combined SPF + DMARC health grade (A–F) with a per-check breakdown and actionable recommendations for your domain.

Check Email Health

SPF Checker

Look up and validate SPF records for any domain. Recursively expands all include chains and flags errors.

Check SPF Record

DMARC Checker

Look up and validate DMARC records for any domain. Every tag is explained with validation status and warnings.

Check DMARC Record

DKIM Checker

Look up and validate DKIM public keys for any domain and selector. Checks key size, flags, and configuration.

Check DKIM Record

Email Header Analyzer

Paste raw email headers to trace the delivery path, check SPF/DKIM/DMARC results, and find routing delays.

Analyze Headers

SPF Generator

Build a valid SPF record for your domain. Select email providers, enter IP ranges, and generate a ready-to-publish TXT record.

Build SPF Record

DMARC Generator

Build a valid DMARC record for your domain. Set policy, reporting URIs, and alignment options.

Build DMARC Record

MTA-STS Checker

Validate MTA-STS DNS records and policy files. Check mode, max_age, MX coverage, and policy file reachability.

Check MTA-STS

BIMI Checker

Validate BIMI DNS records, fetch and preview the SVG brand logo, and check VMC certificate URLs.

Check BIMI

免费、快速的 DNS、电子邮件身份验证和网络安全诊断工具。 Free, fast diagnostic tools for DNS, email authentication, and network security