DNS payload modifications by DNS-ALG

+---------------------+

| Header | No Translation required

+---------------------+ ````````````````````````

| | Translate PTR only

| Question | No need to Translate

| | A, MX, NS and SOA

+---------------------+ ``````````````````````

| Answer |

+---------------------+ Translate A, PTR

| Authority | No need to translate

+---------------------+ CNAME, MX, NS and SOA

| Additional |

+---------------------+ ``````````````````````

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