[Jool-list] Hairpinning problem

[Eduardo Montoya]

Hi, is anyone able to explain me why this response packet is being dropped?

[  725.939726] NAT64 Jool: ===============================================
[  725.939746] NAT64 Jool: Catching IPv4 packet: 172.16.1.132->172.16.1.141
[  725.939757] NAT64 Jool: Step 1: Determining the Incoming Tuple
[  725.939771] NAT64 Jool: Tuple: 172.16.1.132#43563 -> 172.16.1.141#20000
(UDP)
[  725.939780] NAT64 Jool: Done step 1.
[  725.939788] NAT64 Jool: Step 2: Filtering and Updating
[  725.939816] NAT64 Jool: BIB entry: 64:ff9b::a21:1#49191 -
172.16.1.141#20000 (UDP)
[  725.939835] NAT64 Jool: Session entry: 64:ff9b::a21:1#49191 -
64:ff9b::ac10:184#43563 | 172.16.1.141#20000 - 172.16.1.132#43563 (UDP)
[  725.939845] NAT64 Jool: Done: Step 2.
[  725.939854] NAT64 Jool: Step 3: Computing the Outgoing Tuple
[  725.939869] NAT64 Jool: Tuple: 64:ff9b::ac10:184#43563 ->
64:ff9b::a21:1#49191 (UDP)
[  725.939877] NAT64 Jool: Done step 3.
[  725.939886] NAT64 Jool: Step 4: Translating the Packet
[  725.939907] NAT64 Jool: Done step 4.
[  725.939932] NAT64 Jool: Packet routed via device 'usb1'.
[  725.939941] NAT64 Jool: Sending skb.
[  725.940026] NAT64 Jool: Success.
[  725.945090] NAT64 Jool: ===============================================
[  725.945125] NAT64 Jool: Catching IPv6 packet:
64:ff9b::a21:1->64:ff9b::ac10:184
[  725.945142] NAT64 Jool: Step 1: Determining the Incoming Tuple
[  725.945163] NAT64 Jool: Tuple: 64:ff9b::a21:1#49191 ->
64:ff9b::ac10:184#43563 (UDP)
[  725.945174] NAT64 Jool: Done step 1.
[  725.945185] NAT64 Jool: Step 2: Filtering and Updating
[  725.945198] NAT64 Jool: Hairpinning loop. Dropping...
[  726.139093] NAT64 Jool: ===============================================

Thanks.

-- 
         *Eduardo Montoya*
--------------------------------------------
Embedded Firmware Engineer
Kirale Technologies S.L.
Logroño, SPAIN

www.kirale.com
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