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spoofing attack detect:
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。
3.5.4 Security Service
Security Service is mainly used for forbidding or allowing access of some web service, as Figure 3-21。
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；
※Attention: if enable corresponding service by http, it will forbid http service, and user cannot visit
through browser.
3.5.5 Virus Protection
Virus protection can prevent common network virus attack, as shown Figure 3-22.
5G CPE User Manual
spoofing attack, if enable, prevent outer net linking by using inner net IP；
Figure 3-20
Figure 3-21
Page 21 , Total 25
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