What is the task of a firewall? List the elements of X.509.

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Suresh Chand · Accepted Answer

A 'firewall', is a tool that provides a filter of both incoming and outgoing packets. Thus, the main task of the firewall itself is to monitor and control all incoming or outgoing access to network connections based on predetermined security rules. Most firewalls perform two basic security functions. Packet filtering is based on accept or deny policy that is itself based on the rules of the security policy. Application proxy gateways provide services to the inside users and at the same time protect each individual host from the 'bad' outside users. The list of the elements of X.509 is as follows: Version. Which X.509 version applies to the certificate, indicating what data the certificate must include? Serial number. The CA creates the certificate and must assign it a serial number that distinguishes the CA certificate from other certificates. Algorithm information. The signature algorithm the issuer uses to sign the certificate. Issuer distinguished name. The name of the entity issuing the certificate -- usually, the CA. Validity period of the certificate. The start and end date, as well as the time the certificate is valid and can be trusted. Subject distinguished name. The name to which the certificate is issued. Subject public key information. The public key is associated with the identity. Extensions (optional). Extensions have their own unique IDs, expressed as a set of values called an object identifier. An extension can be rejected if it is not recognized or if the extension has information that can't be processed.

What is the task of a firewall? List the elements of X.509.

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What is the task of a firewall? List the elements of X.509.

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