Hence, the common name in the server certificate must be in a complete host-domain format or equal to the name of the web address being accessed such as For example, if a user access, the common name in the server certificate has *. and the firewall identifies the application as "ssl". Note: If the common name includes a wildcard such as *., then the application is identified as SSL. RDNSequence item: 1 item (id-at-commonName=RelativeDistinguishedName item (id-at-commonName=Id: 2.5.4.3 (id-at-commonName)ĪlgorithmIdentifier (shaWithRSAEncryption)Įncrypted: 5d7d0a416cbfdde19ba0525a84eb866d0b9f14214e3e5d61.Ĭertificate (id-at-commonName=DigiCert Secure Server CA,id-at-organizationName=DigiCert Inc,id-at-countryName=US) RDNSequence item: 1 item (id-at-organizationName=LinkedIn Corporation) RDNSequence item: 1 item (id-at-localityName=Mountain View) RDNSequence item: 1 item (id-at-stateOrProvinceName=California)
RDNSequence item: 1 item (id-at-countryName=US) RdnSequence: 5 items (id-at-commonName=Corporation,id-at-localityName=Mountain View,id-at-stateOrProvinceName=California,id-at-countryName=US) Session ID: c8cb87d3951e03919c5144d2eec8a6ee296ff0a0060becd7.Ĭipher Suite: TLS_RSA_WITH_RC4_128_MD5 (0x0004)Ĭertificate (id-at-commonName=Corporation,id-at-localityName=Mountain View,id-at-stateOrProvinceName=California,id-at-countryName=US)
TLSv1 Record Layer: Handshake Protocol: Multiple Handshake Messages Time Source Destination Protocol Length Destination Port Infoĥ81 04:49:11.642886 216.52.242.80 10.66.24.90 TLSv1 94 Server Hello, Certificate, Server Hello Done See the following Wireshark Snippet, note the bolded items: The firewall looks for the X.509 digital certificate received from the server and inspects the common name field in the SSL Handshake Protocol.įor example, if a user accesses,, the common name in the server certificate has and the firewall identifies the application as "linkedin-base". During the SSL encrypted session, the firewall receives server "hello packets", which has the certificate details or the server can send a separate certificate packet. Palo Alto Networks firewall's can identify applications that use HTTP over SSL/TLS or HTTPS without performing decryption.
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