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I can't understand below log

Unanswered I can't understand below log

  • Monday, April 09, 2012 10:47 AM
     
     
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    This is server side log.

    What is this log's meaning?

    .... TCP TCP:Flags=......S., SrcPort=16215, DstPort=SMTP(25), PayloadLen=0, Seq=4026098798, Ack=0, Win=4380 ( Negotiating scale factor 0x0 ) = 4380 {TCP:40487, IPv4:40486}
    .... TCP TCP:Flags=...A..S., SrcPort=SMTP(25), DstPort=16215, PayloadLen=0, Seq=2345411586, Ack=4026098799, Win=8192 ( Scale factor not supported ) = 8192 {TCP:40487, IPv4:40486}
    .... TCP TCP:Flags=...A...., SrcPort=16215, DstPort=SMTP(25), PayloadLen=0, Seq=4026098799, Ack=2345411587, Win=4380 (scale factor 0x0) = 4380 {TCP:40487, IPv4:40486}
    .... SMTP SMTP:Rsp 220  YPPGW ESMTP server ready (Powered by ******) , 59 bytes {TCP:40487, IPv4:40486}
    .... TCP TCP:[ReTransmit #3885428]Flags=...AP..., SrcPort=SMTP(25), DstPort=16215, PayloadLen=59, Seq=2345411587 - 2345411646, Ack=4026098799, Win=65160 (scale factor 0x0) = 65160 {TCP:40487, IPv4:40486}
    .... TCP TCP:[ReTransmit #3885428]Flags=...AP..., SrcPort=SMTP(25), DstPort=16215, PayloadLen=59, Seq=2345411587 - 2345411646, Ack=4026098799, Win=65160 (scale factor 0x0) = 65160 {TCP:40487, IPv4:40486}
    .... TCP TCP:[ReTransmit #3885428]Flags=...AP..., SrcPort=SMTP(25), DstPort=16215, PayloadLen=59, Seq=2345411587 - 2345411646, Ack=4026098799, Win=65160 (scale factor 0x0) = 65160 {TCP:40487, IPv4:40486}
    .... TCP TCP:[ReTransmit #3885428]Flags=...AP..., SrcPort=SMTP(25), DstPort=16215, PayloadLen=59, Seq=2345411587 - 2345411646, Ack=4026098799, Win=65160 (scale factor 0x0) = 65160 {TCP:40487, IPv4:40486}
    .... TCP TCP:[ReTransmit #3885428]Flags=...AP..., SrcPort=SMTP(25), DstPort=16215, PayloadLen=59, Seq=2345411587 - 2345411646, Ack=4026098799, Win=65160 (scale factor 0x0) = 65160 {TCP:40487, IPv4:40486}
    .... TCP TCP:[ReTransmit #3885428]Flags=...AP..., SrcPort=SMTP(25), DstPort=16215, PayloadLen=59, Seq=2345411587 - 2345411646, Ack=4026098799, Win=65160 (scale factor 0x0) = 65160 {TCP:40487, IPv4:40486}
    .... TCP TCP:[ReTransmit #3885428]Flags=...AP..., SrcPort=SMTP(25), DstPort=16215, PayloadLen=59, Seq=2345411587 - 2345411646, Ack=4026098799, Win=65160 (scale factor 0x0) = 65160 {TCP:40487, IPv4:40486}
    .... TCP TCP:Flags=...A.R.., SrcPort=SMTP(25), DstPort=16215, PayloadLen=0, Seq=2345411646, Ack=4026098799, Win=0 (scale factor 0x0) = 0 {TCP:40487, IPv4:40486}

    immd

     

All Replies

  • Thursday, April 12, 2012 7:36 PM
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    Hi,

    It appears that one of the packets is being sent over and over again.

    Is there something in particular you're looking to diagnose an issue with?

    Thanks,

    Michael Hawker | Program Manager | Network Monitor

     
  • Friday, April 13, 2012 9:39 PM
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    Based on the above, it seems your SMTP server isn't responding.  It accepts the connection, but never responds to the initial request which is signified by the retransmits.