Chapter 11 Filter configuration
143
Nortel Business Secure Router 252 Configuration — Advanced
Figure 64
Executing an IP filter
Packet
into IP Filter
Matched
Matched
Yes
Action Matched
Action Not Matched
More?
No
Filter Active?
Check
IP Protocol
Drop
Drop Packet
Accept Packet
Drop
Forward
Check Next Rule
Check Next Rule
Check Next Rule
Forward
Not Matched
Yes
No
Check Src
IP Addr
Apply SrcAddrMask
to Src Addr
Matched
Check Dest
IP Addr
Apply DestAddrMask
to Dest Addr
Not Matched
Not Matched
Check Src &
Dest Port
Matched
Not Matched
Summary of Contents for 252
Page 14: ...14 Contents NN47923 501 ...
Page 20: ...20 Figures NN47923 501 ...
Page 24: ...24 Tables NN47923 501 ...
Page 30: ...30 Preface NN47923 501 ...
Page 42: ...42 Chapter 1 Getting to know your Nortel Business Secure Router 252 NN47923 501 ...
Page 48: ...48 Chapter 2 Introducing the SMT NN47923 501 SMT menus at a glance Figure 6 SMT overview ...
Page 72: ...72 Chapter 3 WAN and Dial Backup Setup NN47923 501 ...
Page 80: ...80 Chapter 4 LAN setup NN47923 501 ...
Page 84: ...84 Chapter 5 Internet access NN47923 501 ...
Page 98: ...98 Chapter 6 Remote Node setup NN47923 501 ...
Page 102: ...102 Chapter 7 IP Static Route Setup NN47923 501 ...
Page 130: ...130 Chapter 9 Network Address Translation NAT NN47923 501 ...
Page 156: ...156 Chapter 12 SNMP Configuration NN47923 501 ...
Page 178: ...178 Chapter 14 System information and diagnosis NN47923 501 ...
Page 198: ...198 Chapter 15 Firmware and configuration file maintenance NN47923 501 ...
Page 212: ...212 Chapter 17 Remote Management NN47923 501 ...
Page 232: ...232 Appendix B Triangle Route NN47923 501 ...
Page 252: ...252 Appendix D PPPoE NN47923 501 ...
Page 256: ...256 Appendix E Hardware specifications NN47923 501 ...
Page 266: ...266 Appendix F IP subnetting NN47923 501 ...
Page 308: ...308 Appendix H NetBIOS filter commands NN47923 501 ...
Page 332: ...332 Appendix K Brute force password guessing protection NN47923 501 ...