46 lines
1.8 KiB
Plaintext
46 lines
1.8 KiB
Plaintext
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# This is a NAT configuration for a machine on the MediaOne cable network.
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#
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# Background:
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# MediaOne supplies only one IP address, so all traffic from internal machines
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# must be proxied. NAT provides the facilities to do this, but getting the
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# configuration right is a little tricky.
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#
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# The following is what I use, as of Sat Mar 20 18:50:52 EST 1999. Your milage
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# may vary.
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#
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# - mycroft
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# Notes:
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# ep0 is the external interface (to the MediaOne cable modem).
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# ep1 is the internal interface (to the local network).
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# Run `ipf -y' when external address may have changed (from dhclient-script).
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# Map all internal UDP and TCP traffic to the single external address.
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# Make sure all the `proxy' lines are before any generic `portmap' lines, as
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# the first match always wins.
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map ep0 10.0.0.0/8 -> 0/32 proxy port ftp ftp/tcp
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map ep0 10.0.0.0/8 -> 0/32 portmap tcp/udp 1024:65535
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# Map incoming ICMP traffic dynamically.
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# If you ping from an internal machine, only that machine will see incoming
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# ICMPs until the mapping times out!
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map ep0 10.0.0.0/8 -> 0/32
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# Redirect incoming RealMedia traffic to a specific machine.
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rdr ep0 0/0 port 7070 -> 10.1.0.2 port 7070 udp
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rdr ep0 0/0 port 7070 -> 10.1.0.2 port 7070 tcp
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# Redirect ports for incoming ssh connections.
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# This requires having multiple keys for the gateway host in your known_hosts
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# file: one for it and one for each of the machines behind it.
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# You can use host entries in .ssh/config to create convenient shorthands for
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# the internal hosts.
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rdr ep0 0/0 port 2201 -> 10.1.0.2 port 22 tcp
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rdr ep0 0/0 port 2202 -> 10.1.0.3 port 22 tcp
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rdr ep0 0/0 port 2203 -> 10.1.0.4 port 22 tcp
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rdr ep0 0/0 port 2204 -> 10.1.0.5 port 22 tcp
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rdr ep0 0/0 port 2205 -> 10.1.0.6 port 22 tcp
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rdr ep0 0/0 port 2206 -> 10.1.0.7 port 22 tcp
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rdr ep0 0/0 port 2207 -> 10.1.0.8 port 22 tcp
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rdr ep0 0/0 port 2208 -> 10.1.0.9 port 22 tcp
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