Improving Web Application Security: Threats and Countermeasures

Latest patches and updates are installed.

You subscribed to router vendor's security notification service.

Known vulnerable ports are blocked.

Ingress and egress filtering is enabled. Incoming and outgoing packets are confirmed as coming from public or internal networks.

ICMP traffic is screened from the internal network.

Administration interfaces to the router are enumerated and secured.

Web- facing administration is disabled.

Directed broadcast traffic is not received or forwarded.

Unused services are disabled (for example, TFTP).

Strong passwords are used.

Logging is enabled and audited for unusual traffic or patterns.

Large ping packets are screened.

Routing Information Protocol (RIP) packets, if used, are blocked at the outermost router.