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This function allows user to enable the functionality of IP filter. Both inside and outside packets through router could be decided to allow or drop by supervisor.
Figure 41-1 IP Filter Rules
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Example 1 :
Employees (192.168.33.32 ~192.168.33.64) are interdicted to surf Internet. Other employees (192.168.33.16~31) are permitted.
Figure 41-2
Figure 41-3
2. Add new rules in Pass Group.
Figure 41-4
3. Add a rule about SMTP protocol. (port 25) for 192.168.33.16~192.168.33.31.
4. Add another rule about port 53 ( DNS protocol ) , port 80 ( Http protocol ) , port 110 ( POP3 protocol ) for 192.168.33.16~192.168.33.31.
Figure 41-6
5. Finally , Add a rule in block group.
Figure 41-7
6. Beside the previous rules, other connections are forbidden.
Example 2
Only IP 220.220.220.220 is allowed to access my VNC server from Internet as well as only IP 220.220.220.221 is allowed to access my FTP server from Internet. (Other Internet hosts cannot access my internal servers).
Figure 41-9
1. Enable the Data Filter Function.
Figure 41-10
2. Add new rules in Pass Group.
3. Allow IP 220.220.220.220 to access my VNC server. (TCP port 5900)
Figure 41-12
4. Allow IP 220.220.220.221 to access my FTP server. (TCP port 21)
5. Finally , Add a rule in block group.
Figure 41-14
6. Besides the previous rules, other incoming connections are forbidden.
Example 3
Some employees (IP192.168.33.128/27) can use FTP、Mail、Web service , and some (IP 192.168.33.64/26) can only use Mail service.
Figure 41-16
1. Enable the Data Filter Function.
Figure 41-17
2. Add new rules in Pass Group.
3. Allow users with IP 192.168.33.64~192.168.33.127 to use Mail service (SMTP protocol)
Figure 41-19
4. Allow users with IP 192.168.33.64~192.168.33.127 to use Mail service(POP3 protocol)
5. Allow users with IP 192.168.33.64~192.168.33.127 to use DNS service.
Figure 41-21
6. Allow users with IP 192.168.33.128~192.168.33.159 to use FTP, SMTP, POP3, WEB and DNS Services.
Figure 41-23
7. Add a rule in block group.
Figure 41-24
8. Beside the previous rules , other connections are forbidden.
Example 4
Host with IP 192.168.33.10 cannot be accessed by the remote VPN network while hosts with IP192.168.33.5 and 192.168.33.6 can be accessed.
Figure 41-26
1. Enable the Data Filter Function.
Figure 41-27
2. Add new rules in Pass Group.
3. Allow VPN connection from 192.168.29.0 to 192.168.33.5 and 192.168.33.6.
Figure 41-29
4. Add a rule in block group.
Figure 41-31
5. Disallow VPN connection from 192.168.29.0 to 192.168.33.10.
Example 5
Some users ( 192.168.33.33 ~ 192.168.33.36 ) can surf Internet and some ( 192.168.33.16 ~ 192.168.33.31 ) can only access the remote VPN network.
Figure 41-33
1. Enable the Data Filter Function.
Figure 41-34
2. Add new rules in Pass Group.
3. Allow local network 192.168.33.0 to access remote VPN network 192.168.29.0
Figure 41-36
4. Allow users with IP 192.168.33.32~192.168.33.35 to surf Internet ( DNS protocol )
Figure 41-38
5. Allow users with IP 192.168.33.32~192.168.33.35 to surf Internet ( HTTP protocol )
6. Add a rule in block group.
Figure 41-40
7. Beside the previous rules , Other connections are forbidden.
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Figure 41-42
Table 42-1 Firewall /IP Filter Direction.
WAN to LAN From Internet to Intranet, ex : VNC 、Pc Anywhere remote control
WAN to DMZ From Internet to DMZ, ex : allow Internet user to browser web server in DMZ
WAN to WAN From WAN to WAN, ex: Allow WAN1 traffic redirect to WAN2
LAN to WAN From Intranet to Internet, ex : surf Internet
LAN to DMZ From Intranet to DMZ, ex: allow some employees can access DMZ.
LAN to LAN From some security issue, we can use LAN to LAN block function to prohibited LAN1 user from visiting LAN2 resource in VLAN environment.
DMZ to WAN From DMZ to WAN, ex:allow DMZ using Internet resources. DMZ to LAN Form DMZ to LAN, ex: allow DMZ using inner Database. VPN In From remote VPN network to Vigor 3300’s VPN network,
pass/block
VPN Out From Vigor3300's VPN network to remote VPN network, pass/block
