D-Link DSR-150N DSR-150 User Manual - Page 111

Unified Services Router User Manual Figure 70 : Prote cting the route r and LAN from inte rne t attack s WAN Security Checks : En ab le St ealt h M o d e: If St ealt h M o de is en ab led, t h e ro u ter will n o t res p ond t o p o rt s can s fro m t h e W A N. Th is makes it les s s u s cep t ib le t o d is co v ery an d at t acks . Block TCP Flood: If this option is enabled, the router will drop all invalid TCP p acket s an d b e p ro t ect ed fro m a SYN flo o d at t ack. LAN S ecurity Check s : Blo ck UDP Flo o d : If t h is o p t io n is en abled, t h e ro u t er will n o t accep t mo re t h an 20 s imu lt an eo u s , act iv e UDP co n n ect io n s fro m a s in g le co mp u t er o n t h e LA N. UDP Co n n ect io n Limit : Yo u can s et t h e n u mb er o f s imu lt an eo u s act iv e UDP co n n ect io n s t o b e accep t ed fro m a s in g le co mp u t er o n t h e LA N; t h e d efau lt is 25 ICS A S etti ng s : Block ICMP Notification: s electing th is prevents ICMP packets from being identified as s uch. ICMP packets, if identified, can be captured and us ed in a Ping (ICMP) flood DoS attack. 109