Gigamedia System Configuration Manual
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ping of death detect:
ping flood attack, if enable, still allow ping request, but restrict frequent ping
request.
sync flood attack detect:
sync flood attack, if enable, restrict frequency of sending sync.
fragment attack detect:
fragment attack, if enable, restrict fragment package of outer net.
spoofing attack detect:
spoofing attack, if enable, prevent outer net linking by using inner net IP.
ping attack detect:
ping request, if enable, abandon ping requestof outer net sending.
tcp null scan detect
：
tcp null scan, if enable, abandon null scan of tcp sending.
ACK cheat detect
：
ack request, if enable, abandon false ack package of tcp sending.
finger scan detect
：
finger scan, if enable, abandon relevant requests of finger service.
netbios scan detect
：
netbios scab, if enable, abandon relevant requests of netbios service.
2.5.7 Security Service
Security Service is mainly used for forbidding or allowing access of some web service, as Figure 2-48.
Figure 2-49 Security Service
FTP
：
port 21, if enable, forbid ftp service
.
SSH
：
Port 22, if enable, forbid SSH service
.
TELNET
：
port 23, if enable, forbid telnet service
.
HTTP
：
port 80, if enable, forbid http service
.
DNS
：
port 53, if enable, forbid DNS service
.
If enable corresponding service by http, it will forbid http service, and user cannot visit through
browser.
