Wireshark mailing list archives
Re: Problem connection imap SSL
From: Sake Blok <sake () euronet nl>
Date: Mon, 27 Apr 2015 13:02:32 +0200
Hello, It looks like you made the capture on the system with IP address 192.168.0.2 (as the ACK in frame 147 has a length that is smaller than the minimum ethernet length of 64 or 60 without FCS). This endpoint does receive the ACK on the clienthello (frame 150) and it does receive the ServerHello (frame 184). However, it keeps resending the ClientHello with an ACK of 1, as if the ACK and SeverHello were never received. Looking into these two packets (frame 150 and 184), it can be seen that the IP checksum is off by 1. As the IP checksum needs to be recalculated when there is NAT, the natting router between 192.168.0.2 and the Internet might have a bug in the firmware. Could you check whether there is a newer version of the firmware available? Cheers, Sake www.SYN-bit.nl On 25 apr 2015, at 21:31, Jf Sénéchal wrote:
hello I encounter a trouble with my boss at home with his client voo provider he can not read emails professionals via a client such as Thunderbird the connection is in imap ssl port 993 It works everywhere except at his home So obviously the basic tests have been done with other tests ordis the other mail client, other accounts on the same server etc ... According to my analysis it seems that is level with the encryption it raises concerns Contact Customer much mail server, but it seems that there is a return worries Here is some info, customer voo in which everything works and in person to which this poses problems Wireshark chez le client ok http://afmlibre.be/voo/wireshark-ok.jpg Wireshark chez le client ko http://afmlibre.be/voo/wireshark-ko.jpg Wireshark en detail http://afmlibre.be/voo/wireshark-detail.jpg complete capture wireshark http://afmlibre.be/voo/cap2.pcapng tracert http://afmlibre.be/voo/tracer2t.jpg ssldump on mail server http://afmlibre.be/voo/ssldump.jpg Can you help me ? Merci ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: https://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
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Current thread:
- Problem connection imap SSL Jf Sénéchal (Apr 25)
- Re: Problem connection imap SSL Sake Blok (Apr 27)