Date: Wed, 19 May 2021 23:15:05 +0200 From: Michael Tuexen <tuexen@freebsd.org> To: Jens Schweikhardt <schweikh@schweikhardt.net> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: Some odd TCP behavior (timeouts) Message-ID: <46A397AE-E94D-4A31-A14B-1411BA673799@freebsd.org> In-Reply-To: <877716937.20611434.1621446044943.JavaMail.zimbra@schweikhardt.net> References: <877716937.20611434.1621446044943.JavaMail.zimbra@schweikhardt.net>
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> On 19. May 2021, at 19:40, Jens Schweikhardt = <schweikh@schweikhardt.net> wrote: >=20 > Hello,=20 >=20 > I'm having a TCP connectivity issue stumping me and driving me crazy. > The TLDR version: No more printing on my LaserJet (but ping works), > while printing and the web interfacw works fine under Windows. > Other TCP connections apparently flawless. > Wireshark shows FreeBSD performing the three way handshake but > then ignoring some packets sent from the printer (no ACKs) > and retransmitting until timeout hits. >=20 > The details with the wireshark logs are on=20 > = https://superuser.com/questions/1649435/mysterious-tcp-http-issue-accessin= g-laserjet-web-interface Hi Jens, I only see screen shots, but not a link a the actual log files. Could you share the a .pcap or .pcapng file? You can send them to me via = e-mail, if you prefer. Best regards Michael >=20 > I have seen a few commits to CURRENT's tcp and timeout code recently. > I went back to stable/13 as of two days ago, but still no joy. >=20 > Has anyone else noticed something going on with TCP? > Especially HTTP/HTTPS, like connections timing out in rare cases? > If you have a LaserJet (preferably 551dn), can you still access > its web interface, or get a reply with >=20 > printf "GET / HTTP/1.0\r\n\r\n" | nc LaserJet 80 # or 443. >=20 > Regards, >=20 > Jens > --=20 > Jens Schweikhardt http://www.schweikhardt.net/ > SIGSIG -- signature too long (core dumped) >=20
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