SSL Certificate Analysis for rds1.vanngoc.com - Security Grade & TLS Configuration

Open Cached · just now

76/100 SECURITY SCORE

Certificate Information

Subject

CN=sikman.com

Issuer

C=US, O=Let's Encrypt, CN=R13

Valid From

February 06, 2026

Valid Until

May 07, 2026 88 days

Public Key

RSA 4096 bit Strong

Signature Algorithm

SHA256-RSA

SHA-256 Fingerprint

12:A9:AE:7A:AB:59:4E:4E:0F:CB:B1:C6:32:33:C9:60:53:EC:0B:68:0E:91:90:70:B5:C0:6F:C2:80:AB:42:BE

Alternative Names

87 domains

Security Configuration

TLS Protocols

TLS 1.2 TLS 1.3

Forward Secrecy

Supported (Modern clients use PFS)

HTTP Security Headers

Status

Strict-Transport-Security

Missing

Not configured

Content-Security-Policy

Missing

Not configured

X-Frame-Options

Missing

Not configured

X-Content-Type-Options

Missing

Not configured

Referrer-Policy

Missing

Not configured

Permissions-Policy

Missing

Not configured

Recommendations

• Add Strict-Transport-Security header with max-age of at least 1 year
• Add Content-Security-Policy header to prevent XSS attacks
• Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
• Add X-Content-Type-Options: nosniff
• Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
• Consider adding Permissions-Policy to control browser features

CAA Records (Certificate Authority Authorization)

CAA Records

Not Configured (Any CA can issue certificates)

CAA Issues

• No CAA records configured - any CA can issue certificates

Recommendations

• Implement CAA records to restrict which CAs can issue certificates for your domain
• This adds an extra layer of security against unauthorized certificate issuance
• Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
• Consider adding 'iodef' record to receive security incident reports

Subject Alternative Names

87 domains

vanngoc.com *.vanngoc.com *.admin.vanngoc.com *.api.vanngoc.com *.blog.vanngoc.com *.dev.vanngoc.com *.eml.vanngoc.com *.home.vanngoc.com *.hostmaster.vanngoc.com *.m.vanngoc.com *.mx.vanngoc.com *.ns1.vanngoc.com *.rds1.vanngoc.com *.remoto.vanngoc.com *.site1.vanngoc.com *.sitemaps.vanngoc.com *.staging.vanngoc.com *.test.vanngoc.com *.vpn2.vanngoc.com *.ww1.vanngoc.com *.ww16.vanngoc.com *.ww17.vanngoc.com *.ww38.vanngoc.com

Other domains in certificate

*.admin.sikman.com *.anyconnect.sikman.com *.api.sikman.com *.asa.sikman.com *.autodiscover.sikman.com *.cisco.sikman.com *.ciscoasa.sikman.com *.ciscovpn.sikman.com *.cloud.sikman.com *.cpcalendars.sikman.com *.email.sikman.com *.firewall.sikman.com *.ftp.sikman.com *.gateway.sikman.com *.imap.sikman.com *.m.sikman.com *.owa.sikman.com *.ra.sikman.com *.random.sikman.com *.rdp.sikman.com *.rdweb1.sikman.com *.relay.sikman.com *.secure.sikman.com sikman.com *.sikman.com *.sitemap.sikman.com *.sitemaps.sikman.com *.ssl.sikman.com *.terminal2.sikman.com *.test.sikman.com *.virtualaccess.sikman.com *.webdisk.sikman.com *.workspace2.sikman.com *.ww1.sikman.com *.ww16.sikman.com