Date: Fri, 16 Sep 2022 18:44:03 +0200 From: <driesm@FreeBSD.org> To: <driesm@FreeBSD.org>, <freebsd-net@freebsd.org> Subject: RE: PPPoE (mpd5) IPv6 issues Message-ID: <007d01d8c9eb$87a45120$96ecf360$@FreeBSD.org> In-Reply-To: <004701d8c9ea$63e10090$2ba301b0$@FreeBSD.org> References: <004701d8c9ea$63e10090$2ba301b0$@FreeBSD.org>
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[-- Attachment #1 --] Hmm this mail was not finished, sorry about that. I will include the link that fell-off, <https://forum.netgate.com/topic/152935/ipv6-pppoe-mss-incorrect>; IPv6 PPPoE MSS incorrect | Netgate Forum Any help or pointers are greatly appreciated! PS: I use IPFW as my firewall, if this has anything to do with it. I do have a "reassemble all in" rule at the top of my ruleset From: driesm@FreeBSD.org <driesm@FreeBSD.org> Sent: Friday, 16 September 2022 18:36 To: freebsd-net@freebsd.org Subject: PPPoE (mpd5) IPv6 issues Hi freebsd-net! After a lot of google and tinkering I have hit a brick wall trying to set-up my new ISP which uses PPPoE. I'm at the point where IPv4 works fine 100% for all websites. But from the moment I turn on IPv6 all sites that prefer IPv6 stop working, I have confirmed that routing table etc all look good. So I'm more suspicious to a MTU / MSS issue. Although I cant find that much info about it. I have tcpmss fix turned on in my mpd.conf There seems to be a few sites like google.com and youtube.com that keep working. I have googled thoroughly but I was unable to find a fix for my problem. The one close to my issue seems this issue from 2020: [-- Attachment #2 --] <html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; font-size:11.0pt; font-family:"Calibri",sans-serif; mso-fareast-language:EN-US;} a:link, span.MsoHyperlink {mso-style-priority:99; color:#0563C1; text-decoration:underline;} span.EmailStyle19 {mso-style-type:personal-reply; font-family:"Calibri",sans-serif; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-size:10.0pt;} @page WordSection1 {size:612.0pt 792.0pt; margin:72.0pt 72.0pt 72.0pt 72.0pt;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1" /> </o:shapelayout></xml><![endif]--></head><body lang=NL-BE link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hmm this mail was not finished, sorry about that. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I will include the link that fell-off, </span><a href="https://forum.netgate.com/topic/152935/ipv6-pppoe-mss-incorrect"><span lang=EN-US>IPv6 PPPoE MSS incorrect | Netgate Forum</span></a><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Any help or pointers are greatly appreciated!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>PS: I use IPFW as my firewall, if this has anything to do with it. I do have a “reassemble all in” rule at the top of my ruleset<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='mso-fareast-language:NL-BE'>From:</span></b><span lang=EN-US style='mso-fareast-language:NL-BE'> driesm@FreeBSD.org <driesm@FreeBSD.org> <br><b>Sent:</b> Friday, 16 September 2022 18:36<br><b>To:</b> freebsd-net@freebsd.org<br><b>Subject:</b> PPPoE (mpd5) IPv6 issues<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal>Hi freebsd-net!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>After a lot of google and tinkering I have hit a brick wall trying to set-up my new ISP which uses PPPoE.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I’m at the point where IPv4 works fine 100% for all websites. But from the moment I turn on IPv6 all sites that prefer IPv6 stop working, I have confirmed that routing table etc all look good. So I’m more suspicious to a MTU / MSS issue.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Although I cant find that much info about it. I have tcpmss fix turned on in my mpd.conf<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>There seems to be a few sites like google.com and youtube.com that keep working.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I have googled thoroughly but I was unable to find a fix for my problem. The one close to my issue seems this issue from 2020:<o:p></o:p></span></p></div></div></body></html>
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