39 lines
1.2 KiB
Markdown
39 lines
1.2 KiB
Markdown
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## NAMESERVER04: Same source address
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### Test case identifier
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**NAMESERVER04** Same source address
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### Objective
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Responses from the authoritative name servers must contain same source IP
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address as the destination IP address of the initial query. This has been
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clarified in section 4 of
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[RFC 2181](https://datatracker.ietf.org/doc/html/rfc2181#section-4).
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### Inputs
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The domain name to be tested.
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### Ordered description of steps to be taken to execute the test case
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1. Retrieve all address records for all the name servers using [Method
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4](../Methods.md) and [Method 5](../Methods.md).
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2. A SOA query for the domain name sent to the each name server IP address
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found in step 1.
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3. Any answer received from the SOA query must come from the same source IP address
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as the query was sent to. If there is a mismatch, this test case fails.
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### Outcome(s)
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If any response comes from another IP address than the query was sent to,
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this test case fails.
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### Special procedural requirements
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If there are many authoritative DNS nodes behind the IP address the query
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is sent to, there could be multiple answers with possibly different source
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addresses for the query. This special case is currently ignored.
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### Intercase dependencies
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None.
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