Andreas Steffen
7c5a2974b9
For documentation purposes the new folders ikev1-algs, ikev2-algs, ikev1-multi-ca and ikev2-multi-ca have been created. Most of the test cases have now been converted to the vici interface. The remaining legacy stroke scenarios yet to be converted have been put into the ikev2-stroke-bye folder. For documentation purposes some legacy stroke scenarios will be kept in the ikev1-stroke, ikev2-stroke and ipv6-stroke folders.
17 lines
1.1 KiB
Plaintext
17 lines
1.1 KiB
Plaintext
The roadwarriors <b>alice</b> and <b>venus</b> sitting behind the NAT router <b>moon</b> set up
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tunnels to gateway <b>sun</b>. UDP encapsulation is used to traverse the NAT router.
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Since both roadwarriors possess the same 10.1.0.0/25 subnet, gateway <b>sun</b> uses Source NAT
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after ESP decryption to map these subnets to PH_IP_CAROL10 and PH_IP_DAVE10, respectively.
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<p/>
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In order to differentiate between the tunnels to <b>alice</b> and <b>venus</b>, respectively,
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<b>XFRM marks</b> are defined for both the inbound and outbound IPsec SAs and policies using
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the <b>mark</b> parameter in ipsec.conf.
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<p/>
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<b>iptables -t mangle</b> rules are then used in the PREROUTING chain to mark the traffic to
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and from <b>alice</b> and <b>venus</b>, respectively.
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<p/>
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The script designated by <b>leftupdown=/etc/mark_updown</b> automatically inserts
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iptables mangle rules that mark the inbound ESP_IN_UDP packets as well as iptables IPsec-policy rules
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that let pass the tunneled traffic. In order to test the tunnel, the NAT-ed hosts <b>alice</b>
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and <b>venus</b> ping the client <b>bob</b> behind the gateway <b>sun</b>.
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