Security Analysis
web4u.cz
B
190 / 225
1 high1 medium
Basic Security
10/40 (25%)DNSSEC Enabledhigh
DNSSEC protects against DNS spoofing and cache poisoning
→ Enable DNSSEC to protect against DNS spoofing and cache poisoning attacks. Contact your domain registrar to enable DNSSEC.
Multiple Nameservers
Multiple nameservers provide redundancy
Nameserver Diversitylow
Nameservers on different networks improve resilience
→ Both nameservers are run by one operator (web4u.cz). If it has an outage, the domain stops resolving; a second DNS provider protects against that.
Record Security
55/55 (100%)CAA Records
CAA restricts which CAs can issue certificates
SPF Record
SPF prevents email spoofing
DMARC Record
DMARC protects against phishing
DKIM Presence
DKIM key published at default._domainkey, s1._domainkey, s2._domainkey
Advanced Security
20/25 (80%)Mail Server Configurationmedium
Multiple MX records provide email redundancy
→ Consider a second MX host with a larger preference number (it is tried only when the first does not answer), so mail is not lost while your main server is down. Skip this if your mail provider says to publish only one MX record.
SOA Record Configuration
SOA timers that do not delay new names or expire secondaries (refresh 4h, retry 1h, expire 14d, SOA minimum 4h)
IPv6 Support
AAAA records enable IPv6 connectivity
Domain Reputation
50/50 (100%)Typosquatting Check
Domain does not mimic protected brands
Domain Blacklist Status
Domain checked against spam and malware blacklists (Spamhaus DBL, SURBL, URIBL)
IP Blacklist Status
Server IP addresses checked against spam and abuse blacklists (Spamhaus ZEN, SpamCop, Barracuda)
Threat Detection
55/55 (100%)DGA Detection
Domain Generation Algorithm detection
DNS Tunneling Detection
Detection of data exfiltration via DNS
Fast-Flux Detection
Detection of rapidly changing DNS infrastructure
Domain Age Check
Registered 25 years ago, not a newly registered domain