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Openstack VM (también redhat) envía consultas DNS extrañas

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Openstack VM (también redhat) envía consultas DNS extrañas

Tengo algunas consultas de DNS extrañas y no puedo encontrar por qué o qué proceso solicita algo así.

Bajo extraño me refiero a solicitud de "-P". Parece que el sistema tiene algún tipo de "característica" fantasma que envía solicitudes "-P".

Se registró /var/log/messages y todos los demás registros, pero nada.

Se parece a esto:

750 4.880197       172.34.167.129        172.34.167.193        DNS      64     Standard query 0xa6d9 A -P
751 4.880228       172.34.167.129        172.34.167.193        DNS      64     Standard query 0xcf06 AAAA -P
752 4.882101       172.34.167.193        172.34.167.129        DNS      64     Standard query response 0xa6d9 Refused A -P
753 4.882122       172.34.167.193        172.34.167.129        DNS      64     Standard query response 0xcf06 Refused AAAA -P

Detalles:

No.     Time           Source                Destination           Protocol Length Info
    750 4.880197       172.34.167.129        172.34.167.193        DNS      64     Standard query 0xa6d9 A -P

Frame 750: 64 bytes on wire (512 bits), 64 bytes captured (512 bits)
Linux cooked capture
Internet Protocol Version 4, Src: 172.34.167.129, Dst: 172.34.167.193
User Datagram Protocol, Src Port: 27798, Dst Port: 53
Domain Name System (query)
    [Response In: 752]
    Transaction ID: 0xa6d9
    Flags: 0x0100 Standard query
    Questions: 1
    Answer RRs: 0
    Authority RRs: 0
    Additional RRs: 0
    Queries
        -P: type A, class IN
            Name: -P
            [Name Length: 2]
            [Label Count: 1]
            Type: A (Host Address) (1)
            Class: IN (0x0001)

No.     Time           Source                Destination           Protocol Length Info
    751 4.880228       172.34.167.129        172.34.167.193        DNS      64     Standard query 0xcf06 AAAA -P

Frame 751: 64 bytes on wire (512 bits), 64 bytes captured (512 bits)
Linux cooked capture
Internet Protocol Version 4, Src: 172.34.167.129, Dst: 172.34.167.193
User Datagram Protocol, Src Port: 27798, Dst Port: 53
Domain Name System (query)
    [Response In: 753]
    Transaction ID: 0xcf06
    Flags: 0x0100 Standard query
    Questions: 1
    Answer RRs: 0
    Authority RRs: 0
    Additional RRs: 0
    Queries
        -P: type AAAA, class IN
            Name: -P
            [Name Length: 2]
            [Label Count: 1]
            Type: AAAA (IPv6 Address) (28)
            Class: IN (0x0001)

No.     Time           Source                Destination           Protocol Length Info
    752 4.882101       172.34.167.193        172.34.167.129        DNS      64     Standard query response 0xa6d9 Refused A -P

Frame 752: 64 bytes on wire (512 bits), 64 bytes captured (512 bits)
Linux cooked capture
Internet Protocol Version 4, Src: 172.34.167.193, Dst: 172.34.167.129
User Datagram Protocol, Src Port: 53, Dst Port: 27798
Domain Name System (response)
    [Request In: 750]
    [Time: 0.001904000 seconds]
    Transaction ID: 0xa6d9
    Flags: 0x8105 Standard query response, Refused
    Questions: 1
    Answer RRs: 0
    Authority RRs: 0
    Additional RRs: 0
    Queries
        -P: type A, class IN
            Name: -P
            [Name Length: 2]
            [Label Count: 1]
            Type: A (Host Address) (1)
            Class: IN (0x0001)

No.     Time           Source                Destination           Protocol Length Info
    753 4.882122       172.34.167.193        172.34.167.129        DNS      64     Standard query response 0xcf06 Refused AAAA -P

Frame 753: 64 bytes on wire (512 bits), 64 bytes captured (512 bits)
Linux cooked capture
Internet Protocol Version 4, Src: 172.34.167.193, Dst: 172.34.167.129
User Datagram Protocol, Src Port: 53, Dst Port: 27798
Domain Name System (response)
    [Request In: 751]
    [Time: 0.001894000 seconds]
    Transaction ID: 0xcf06
    Flags: 0x8105 Standard query response, Refused
    Questions: 1
    Answer RRs: 0
    Authority RRs: 0
    Additional RRs: 0
    Queries
        -P: type AAAA, class IN
            Name: -P
            [Name Length: 2]
            [Label Count: 1]
            Type: AAAA (IPv6 Address) (28)
            Class: IN (0x0001)

Respuesta1

Supongo que esto es el resultado de una simple mala configuración en la que se espera una variable de nombre de host pero falta y la siguiente opción de línea de comando, -Pse interpreta como el parámetro de nombre de host.

Algo como esto:

HOST=""
PORT=""
/path/to/command $OTHER_ARGS -H $HOST -P $PORT

que debido a variables vacías y faltantes se ve así:

/path/to/command -H -P

Encontrar qué aplicación es, podría ser tan simple o tan difícil como encontrar la aplicación (que no se ejecuta correctamente) que admita un -Pcambio de línea de comandos...

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