Cdn check with domain and with dns response

internal/runner/runner.go

@@ -679,7 +679,25 @@ func (r *Runner) worker() {
 		}
 		// add flags for cdn
 		if r.options.OutputCDN {
-			dnsData.IsCDNIP, dnsData.CDNName, _ = r.dnsx.CdnCheck(domain)
+			if len(dnsData.A) > 0 || len(dnsData.AAAA) > 0 || len(dnsData.CNAME) > 0 {
+				// reuse existing DNS response to avoid redundant lookups and ensure
+				// consistency between reported records and CDN detection
+				var cdnErr error
+				dnsData.IsCDNIP, dnsData.CDNName, dnsData.CDNType, cdnErr = r.dnsx.CdnCheckRespData(dnsData.DNSData)
+				if cdnErr != nil {
+					gologger.Debug().Msgf("cdn check failed for %s: %v", domain, cdnErr)
+				}
+			} else {
+				// fall back to a fresh lookup when the response lacks A/AAAA/CNAME records
+				var cdnErr error
+				dnsData.IsCDNIP, dnsData.CDNName, cdnErr = r.dnsx.CdnCheck(domain)
+				if cdnErr != nil {
+					gologger.Debug().Msgf("cdn check failed for %s: %v", domain, cdnErr)
+				}
+				if dnsData.IsCDNIP {
+					dnsData.CDNType = "cdn"
+				}
+			}
 		}
 		if r.options.ASN {
 			results := []*asnmap.Response{}

libs/dnsx/cdn.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net"
 
+	retryabledns "github.com/projectdiscovery/retryabledns"
 	iputil "github.com/projectdiscovery/utils/ip"
 )
 
@@ -18,7 +19,6 @@ func (d *DNSX) CdnCheck(domain string) (bool, string, error) {
 		return false, "", err
 	}
 	ipv4Ips := []net.IP{}
-	// filter ipv4s for ips
 	for _, ip := range ips {
 		if iputil.IsIPv4(ip) {
 			ipv4Ips = append(ipv4Ips, ip)
@@ -31,5 +31,14 @@ func (d *DNSX) CdnCheck(domain string) (bool, string, error) {
 	if !iputil.IsIP(ipAddr) {
 		return false, "", fmt.Errorf("%s is not a valid ip", ipAddr)
 	}
-	return d.cdn.CheckCDN(net.ParseIP((ipAddr)))
+	return d.cdn.CheckCDN(net.ParseIP(ipAddr))
+}
+
+// CdnCheckRespData verifies if the given DNS response data is part of known CDN/WAF/Cloud ranges,
+// avoiding additional DNS lookups by reusing already-resolved data.
+func (d *DNSX) CdnCheckRespData(dnsdata *retryabledns.DNSData) (matched bool, value string, itemType string, err error) {
+	if d.cdn == nil {
+		return false, "", "", errors.New("cdn client not initialized")
+	}
+	return d.cdn.CheckDNSResponse(dnsdata)
 }

libs/dnsx/dnsx.go

@@ -39,6 +39,7 @@ type ResponseData struct {
 	*retryabledns.DNSData
 	IsCDNIP bool         `json:"cdn,omitempty" csv:"cdn"`
 	CDNName string       `json:"cdn-name,omitempty" csv:"cdn-name"`
+	CDNType string       `json:"cdn-type,omitempty" csv:"cdn-type"`
 	ASN     *AsnResponse `json:"asn,omitempty" csv:"asn"`
 }
 type AsnResponse struct {