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BASIC.NAT
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BASIC_1.FW
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BASIC_2.FW
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README
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example.1
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example.10
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example.14
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example.2
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example.3
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example.4
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example.5
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example.6
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example.7
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example.8
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example.9
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example.sr
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examples.txt
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firewall
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firewall.1
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firewall.2
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ftp-proxy
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ftppxy
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ipf-howto.txt
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ipf.conf.permissive
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ipf.conf.restrictive
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ipf.conf.sample
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ipnat.conf.sample
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mkfilters
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nat-setup
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nat.eg
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rules.txt
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server
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tcpstate
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Editing: BASIC.NAT
#!/sbin/ipnat -f - # # THIS EXAMPLE IS WRITTEN FOR IP FILTER 3.3 # # ppp0 - (external) PPP connection to ISP, address a.b.c.d/32 # # ed0 - (internal) network interface, address w.x.y.z/32 # # If we have only 1 valid IP address from our ISP, then we do this: # # To make ftp work, using the internal ftp proxy, use: # map ppp0 w.x.y.z/24 -> a.b.c.d/32 proxy port ftp ftp/tcp # # For normal TCP/UDP and other IP protocols # map ppp0 w.x.y.z/24 -> a.b.c.d/32 portmap tcp/udp 40000:60000 map ppp0 w.x.y.z/24 -> a.b.c.d/32 # # if we get a different dialup IP address each time, then we would use: # #map ppp0 w.x.y.z/24 -> 0/32 portmap tcp/udp 40000:60000 #map ppp0 w.x.y.z/24 -> 0/32 # # If we have a class C address space of valid IP#'s from our ISP, then we can # do this: # #map ppp0 w.x.y.z/24 -> a.b.c.d/24 portmap tcp/udp 40000:60000 #map ppp0 w.x.y.z/24 -> a.b.c.d/24 # # or, if we only have a small number of PC's, this: # #map ppp0 w.x.y.v/32 -> a.b.c.E/32 portmap tcp/udp 40000:60000 #map ppp0 w.x.y.v/32 -> a.b.c.E/32 #map ppp0 w.x.y.u/32 -> a.b.c.F/32 portmap tcp/udp 40000:60000 #map ppp0 w.x.y.u/32 -> a.b.c.F/32 #map ppp0 w.x.y.t/32 -> a.b.c.G/32 portmap tcp/udp 40000:60000 #map ppp0 w.x.y.t/32 -> a.b.c.G/32 #map ppp0 w.x.y.s/32 -> a.b.c.H/32 portmap tcp/udp 40000:60000 #map ppp0 w.x.y.s/32 -> a.b.c.H/32 #map ppp0 w.x.y.r/32 -> a.b.c.I/32 portmap tcp/udp 40000:60000 #map ppp0 w.x.y.r/32 -> a.b.c.I/32 #map ppp0 w.x.y.q/32 -> a.b.c.J/32 portmap tcp/udp 40000:60000 #map ppp0 w.x.y.q/32 -> a.b.c.J/32 #map ppp0 w.x.y.p/32 -> a.b.c.K/32 portmap tcp/udp 40000:60000 #map ppp0 w.x.y.p/32 -> a.b.c.K/32
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