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295462Re: disturbing TLS error

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  • Viktor Dukhovni
    Sep 13, 2013
    • 0 Attachment
      On Fri, Sep 13, 2013 at 11:51:39PM +0200, Mathieu R. wrote:

      > not very much more :
      >
      > Sep 13 23:33:09 effraie01 postfix/smtpd[25221]: connect from
      > ng4.bullet.mail.bf1.yahoo.com[98.139.164.99]
      > Sep 13 23:33:44 effraie01 postfix/smtpd[25221]: SSL_accept error
      > from ng4.bullet.mail.bf1.yahoo.com[98.139.164.99] lost connection
      > Sep 13 23:33:44 effraie01 postfix/smtpd[25221]: lost connection
      > after STARTTLS from ng4.bullet.mail.bf1.yahoo.com[98.139.164.99]
      > Sep 13 23:33:44 effraie01 postfix/smtpd[25221]: disconnect from
      > ng4.bullet.mail.bf1.yahoo.com[98.139.164.99]
      >
      > http://bazar.effraie.org/yahoo1.pcap (i personally do not understand
      > anything from this...)

      Yahoo sends "STARTTLS", Postfix says "go ahead" and Yahoo disconnects.
      There's is nothing more to it. Some strange problem on the Yahoo
      side, unless your firewall is blocking the handshake.

      17:38:34.652085 IP 98.139.164.99.42311 > 95.142.171.138.25: Flags [P.], seq 37:47, ack 195, win 1040, options [nop,nop,TS val 616343063 ecr 91542692], length 10
      0x0000: 4500 003e 611a 4000 3506 d298 628b a463 E..>a.@.5...b..c
      0x0010: 5f8e ab8a a547 0019 6738 edab 0462 d552 _....G..g8...b.R
      0x0020: 8018 0410 a555 0000 0101 080a 24bc a617 .....U......$...
      0x0030: 0574 d4a4 5354 4152 5454 4c53 0d0a .t..STARTTLS..
      17:38:34.652231 IP 95.142.171.138.25 > 98.139.164.99.42311: Flags [P.], seq 195:225, ack 47, win 453, options [nop,nop,TS val 91544215 ecr 616343063], length 30
      0x0000: 4500 0052 6a67 4000 4006 be37 5f8e ab8a E..Rjg@.@..7_...
      0x0010: 628b a463 0019 a547 0462 d552 6738 edb5 b..c...G.b.Rg8..
      0x0020: 8018 01c5 124c 0000 0101 080a 0574 da97 .....L.......t..
      0x0030: 24bc a617 3232 3020 322e 302e 3020 5265 $...220.2.0.0.Re
      0x0040: 6164 7920 746f 2073 7461 7274 2054 4c53 ady.to.start.TLS
      0x0050: 0d0a ..
      17:38:34.859123 IP 98.139.164.99.42311 > 95.142.171.138.25: Flags [.], ack 225, win 1040, options [nop,nop,TS val 616343269 ecr 91544215], length 0
      0x0000: 4500 0034 68de 4000 3506 cade 628b a463 E..4h.@.5...b..c
      0x0010: 5f8e ab8a a547 0019 6738 edb5 0462 d570 _....G..g8...b.p
      0x0020: 8010 0410 e0d6 0000 0101 080a 24bc a6e5 ............$...
      0x0030: 0574 da97 .t..
      17:38:39.379757 IP 98.139.164.99.42311 > 95.142.171.138.25: Flags [F.], seq 47, ack 225, win 1040, options [nop,nop,TS val 616347791 ecr 91544215], length 0
      0x0000: 4500 0034 c72e 4000 3506 6c8e 628b a463 E..4..@.5.l.b..c
      0x0010: 5f8e ab8a a547 0019 6738 edb5 0462 d570 _....G..g8...b.p
      0x0020: 8011 0410 cf2b 0000 0101 080a 24bc b88f .....+......$...
      0x0030: 0574 da97 .t..
      17:38:39.380192 IP 95.142.171.138.25 > 98.139.164.99.42311: Flags [F.], seq 225, ack 48, win 453, options [nop,nop,TS val 91545397 ecr 616347791], length 0
      0x0000: 4500 0034 6a68 4000 4006 be54 5f8e ab8a E..4jh@.@..T_...
      0x0010: 628b a463 0019 a547 0462 d570 6738 edb6 b..c...G.b.pg8..
      0x0020: 8011 01c5 122e 0000 0101 080a 0574 df35 .............t.5
      0x0030: 24bc b88f $...
      17:38:39.522307 IP 98.139.164.99.42311 > 95.142.171.138.25: Flags [.], ack 226, win 1040, options [nop,nop,TS val 616347932 ecr 91545397], length 0
      0x0000: 4500 0034 0147 4000 3506 3276 628b a463 E..4.G@.5.2vb..c
      0x0010: 5f8e ab8a a547 0019 6738 edb6 0462 d571 _....G..g8...b.q
      0x0020: 8010 0410 c9ff 0000 0101 080a 24bc b91c ............$...
      0x0030: 0574 df35 .t.5

      --
      Viktor.
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