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* Add a module for doing Network Address Translation.

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svn path=/nixos/trunk/; revision=26246
This commit is contained in:
Eelco Dolstra
2011-03-10 12:08:39 +00:00
parent e2e7b689b4
commit 9bf4ac079e
3 changed files with 115 additions and 14 deletions
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33
tests/nat.nix
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@@ -19,7 +19,9 @@
router =
{ config, pkgs, ... }:
{ virtualisation.vlans = [ 2 1 ];
environment.systemPackages = [ pkgs.iptables ];
networking.nat.enable = true;
networking.nat.internalIPs = "192.168.1.0/24";
networking.nat.externalInterface = "eth1";
};
server =
@@ -37,22 +39,25 @@
# The router should have access to the server.
$server->waitForJob("httpd");
$router->mustSucceed("curl --fail http://server/ >&2");
$router->succeed("curl --fail http://server/ >&2");
# But the client shouldn't be able to reach the server.
$client->mustFail("curl --fail --connect-timeout 5 http://server/ >&2");
# The client should be also able to connect via the NAT router.
$router->waitForJob("nat");
$client->succeed("curl --fail http://server/ >&2");
$client->succeed("ping -c 1 server >&2");
# If we turn off NAT, the client shouldn't be able to reach the server.
$router->succeed("stop nat");
$client->fail("curl --fail --connect-timeout 5 http://server/ >&2");
$client->fail("ping -c 1 server >&2");
# Enable NAT on the router.
$router->mustSucceed(
"iptables -t nat -F",
"iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 192.168.1.0/24 -j ACCEPT",
"iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -j SNAT "
. "--to-source ${nodes.router.config.networking.ifaces.eth1.ipAddress}",
"echo 1 > /proc/sys/net/ipv4/ip_forward"
);
# And make sure that restarting the NAT job works.
$router->succeed("start nat");
$client->succeed("curl --fail http://server/ >&2");
$client->succeed("ping -c 1 server >&2");
# Now the client should be able to connect.
$client->mustSucceed("curl --fail http://server/ >&2");
$client->succeed("ping -c 1 router >&2");
$router->succeed("ping -c 1 client >&2");
'';
}