Domain technical report
502 Bad Gateway
bdysgz.cn
IPv41
IPv61
MX0
NS2
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55
Total
85
DNS
0
Email
65
Security
55
Network
60
Availability
Domainbdysgz.cn
IPv41
IPv61
MX records0
StatusActive
DiagnosticsMain findings and recommendations
IPv4 (A)30 / 30 pts · Dns
1 IPv4 address(es) detected.
IPv6 (AAAA)10 / 10 pts · Dns
1 IPv6 address(es) detected.
Name server redundancy20 / 20 pts · Dns
2 NS record(s); 2 or more required.
SOA record10 / 10 pts · Dns
Authoritative zone record.
DNSSEC chain0 / 15 pts · Dns
Both DS and DNSKEY are required.
CAA policy5 / 5 pts · Dns
Certificate authority restriction.
DNS propagation10 / 10 pts · Dns
Agreement between public resolvers.
MX records0 / 20 pts · Mail
0 MX record(s).
SPF0 / 25 pts · Mail
SPF policy not found.
DMARC0 / 25 pts · Mail
DMARC policy not found.
DKIM0 / 20 pts · Mail
No tested DKIM selector responded.
MTA-STS0 / 5 pts · Mail
Mail transport policy.
TLS-RPT0 / 5 pts · Mail
TLS reporting policy.
Valid TLS certificate55 / 55 pts · Security
52 day(s) remaining.
Certificate lifetime10 / 10 pts · Security
Full points require at least 30 days remaining.
HTTP security headers0 / 35 pts · Security
0 of 9 evaluated headers detected.
PTR reverse DNS0 / 30 pts · Network
PTR not detected.
IPv4 diversity20 / 35 pts · Network
Two or more IPv4 addresses receive full points.
IPv6 connectivity35 / 35 pts · Network
AAAA availability.
DNS resolution40 / 40 pts · Availability
At least one address family must resolve.
HTTP response0 / 40 pts · Availability
HTTP/2 502
HTTPS final URL20 / 20 pts · Availability
Final URL uses HTTPS.
DNS and emailPublished records and email configuration
A
1 record(s)120.211.208.227
AAAA
1 record(s)2409:8704:5501:1::2
CNAME
0 record(s)—
Not configured
MX
0 record(s)—
Not configured
TXT
0 record(s)—
Not configured
NS
2 record(s)dns32.hichina.com. dns31.hichina.com.
SOA
1 record(s)dns31.hichina.com. hostmaster.hichina.com. 2026052809 3600 1200 86400 600
CAA
1 record(s);; communications error to 69.64.44.20#53: timed out
DS
0 record(s)—
Not configured
DNSKEY
0 record(s)—
Not configured
RRSIG
0 record(s)—
Not configured
NSEC
0 record(s)—
Not configured
NSEC3
0 record(s)—
Not configured
SRV
0 record(s)—
Not configured
NAPTR
0 record(s)—
Not configured
TLSA
0 record(s)—
Not configured
SSHFP
0 record(s)—
Not configured
SPF
Not configured—
Not configured
DMARC
Not configured—
Not configured
DKIM
Not found—
Not configured
Analyzed webpageMetadata and HTTP response
Title and description
ExtractedTitle
502 Bad Gateway
Description
Final URL
https://bdysgz.cn/
HTTP status
502
HTTP
Status
HTTP/2 502
Final URL
https://bdysgz.cn/
Version
3
Server
X-Powered-By
SSL and HTTP securityCertificate, protocol and security headers
SSL certificate
AvailableAvailable
Yes
Issuer
WoTrus CA Limited
CN
*.bdysgz.cn
Valid from
2026-03-15T19:00:00-05:00
Valid until
2026-09-30T18:59:59-05:00
Days remaining
52
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384
Security headers
0 activeHSTSNot detected
Content Security PolicyNot detected
X-Content-Type-OptionsNot detected
X-Frame-OptionsNot detected
Referrer PolicyNot detected
Permissions PolicyNot detected
Cross-Origin-Opener-PolicyNot detected
Cross-Origin-Embedder-PolicyNot detected
Cross-Origin-Resource-PolicyNot detected
DNS propagationComparison across public resolvers
Public resolver comparison
ConsistentConsistent propagation
5 public resolvers queried.
ResolverServerResultLatency
Google
8.8.8.8120.211.208.227
272,14 ms
Cloudflare
1.1.1.1120.211.208.227
695,75 ms
Quad9
9.9.9.9120.211.208.227
259,99 ms
OpenDNS
208.67.222.222120.211.208.227
1.920,72 ms
AdGuard
94.140.14.14120.211.208.227
746,58 ms
IP, geolocation and ASNAssociated network information
120.211.208.227
Identifiedsuccess
Yes
country
China
country_code
CN
region
Hebei Sheng
city
Shijiazhuang
latitude
38.0363497
longitude
114.4679903
asn
24547
organization
China Mobile Communications Corporation
isp
Hebei Mobile Communication Company Limited
timezone
Asia/Shanghai
Visitor information
Visitorip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No
SMTPEmail port connectivity
bdysgz.cn
Port 25: Closed/unreachable - 0.8 ms - Port 465: Closed/unreachable - 4020.8 ms - Port 587: Closed/unreachable - 4223.3 ms -