File: ack_set

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file content (15 lines) | stat: -rw-r--r-- 610 bytes parent folder | download | duplicates (3) 
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Rare occurence of non-zero ACK packets. The source system is a Linux box,
but it was most likely running some evil tool. Note the source port of
21.

Same in ack_set2.

80.117.4.92:21 - UNKNOWN [56922:113:0:40:.:A:?:?]
  -> 217.8.32.51:21 (link: unspecified)
  -- EXTRA TCP VALUES: ACK=0x41e8a62a, UNUSED=0, URG=0x0
80.117.4.92:21 - UNKNOWN [56922:113:0:40:.:A:?:?]
  -> 217.8.32.52:21 (link: unspecified)
  -- EXTRA TCP VALUES: ACK=0x41e8a62a, UNUSED=0, URG=0x0
80.117.4.92:21 - UNKNOWN [56922:113:0:40:.:A:?:?]
  -> 217.8.32.53:21 (link: unspecified)
  -- EXTRA TCP VALUES: ACK=0x41e8a62a, UNUSED=0, URG=0x0