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Denial of Service
It is highly recommended that the DoS Protection feature be enabled to
prevent attacks on the network. However, if you allow someone to manage
the router from outside or are running a web server, e-mail server, or FTP
server, you should either disable Detect SYN Flood Attack or increase the
TCP flow. Otherwise, the configuration web pages will not be sent smoothly.
VPN Settings
VPNs (Virtual Private Networking) provide secure communication between
two separate networks without using a dedicated leased line. In order to
achieve this functionality, a secure tunnel must be built between the two sites
for secure communication over the Internet. The SA supports the most
popular protocol - PPTP. PPTP (Point-to-Point Tunneling Protocol),
described in RFC 2637 is a PPP-specific protocol proposed by Microsoft. The
SA implements a PPTP server. The remote user can connect to the PPTP
server and access a local host behind the PPTP server. When you select the
VPN item in left menu of the web page, PPTP configuration options will
appear. Please refer to the corresponding section for these configurations.