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57 lines
1.9 KiB
Plaintext
57 lines
1.9 KiB
Plaintext
== NTK_RFC 0004 ==
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Subject: Mail Exchange request
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----
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This text describes how the MX DNS query are resolved by ANDNA.
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* WARNING *
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This RFC has been deprecated by the NTK_RFC 0009
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* WARNING *
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----
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In the DNS the resolution of the MX field is handled directly by the DNS
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servers, in ANDNA, instead, the resolution of an MX hostname is a redirect
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request. In short it means that the request, instead of being sent to a
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hash_node, is sent to the register_node itself,
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== hname MX resolution ==
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The resolution of a MX hostnames in ANDNA works in this way:
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* We are trying to resolve the MX of the "pippo" hname.
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* "pippo" is resolved normally and the IP of the register_node is gained.
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* We ask to the register_node the IP of its MX.
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== hname MX registration ==
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Since the IP of the MX node can change during the time, the register_node must
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be aware of its current IP.
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It is the MX node itself that tells the register_node its current IP each time
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it changes. The MX node to contact the register_node has to simply resolve its
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hname.
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The register_node has to verify the authenticity of the IP update request,
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therefore the MX node will sign the request with the private key of the
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register_node.
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This system is necessary because the MX node and the register node have to be
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synced. In this way when the register_node dies or can't be reached anymore,
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the MX node can't be contacted too.
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Moreover this system prevents the spoofing of the MX node.
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The steps necessary to register a hname MX are:
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* Copy the ANDNA private key of the register node, which is saved in its lcl_cache, to the MX node:
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{{{
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register_node# scp /usr/share/netsukuku/andna_lcl_keyring mx_node:/etc/netsukuku/mx/<HNAME_MX>
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# <HNAME_MX> is the hname relative to the MX node
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}}}
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* Send a SIGHUP to the MX NetsukukuD:
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{{{
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register_node# ssh mx_node "killall -HUP ntkd"
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}}}
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If no MX is associated to an hostname, the register_node will use its own IP
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as the default MX IP.
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----
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related: [Netsukuku_RFC]
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