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[87.64.17.139]) by smtp.gmail.com with ESMTPSA id oz9-20020a1709077d8900b0077086ee4633sm10638381ejc.53.2022.09.16.09.44.01 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Sep 2022 09:44:02 -0700 (PDT) From: To: , References: <004701d8c9ea$63e10090$2ba301b0$@FreeBSD.org> In-Reply-To: <004701d8c9ea$63e10090$2ba301b0$@FreeBSD.org> Subject: RE: PPPoE (mpd5) IPv6 issues Date: Fri, 16 Sep 2022 18:44:03 +0200 Message-ID: <007d01d8c9eb$87a45120$96ecf360$@FreeBSD.org> List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_007E_01D8C9FC.4B2DBD60" X-Mailer: Microsoft Outlook 16.0 Content-Language: en-be Thread-Index: AQJZulkgwP+QrU8Xsk0/1jKwHaM6NqzgYXHQ X-Rspamd-Queue-Id: 4MTfzS4Gmjz3r8P X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of driesm.michiels@gmail.com designates 209.85.208.52 as permitted sender) smtp.mailfrom=driesm.michiels@gmail.com X-Spamd-Result: default: False [-2.97 / 15.00]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-0.99)[-0.991]; NEURAL_HAM_LONG(-0.98)[-0.977]; FORGED_SENDER(0.30)[driesm@FreeBSD.org,driesmmichiels@gmail.com]; R_SPF_ALLOW(-0.20)[+ip4:209.85.128.0/17:c]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; RCPT_COUNT_TWO(0.00)[2]; R_DKIM_NA(0.00)[]; FROM_NO_DN(0.00)[]; RWL_MAILSPIKE_POSSIBLE(0.00)[209.85.208.52:from]; RCVD_IN_DNSWL_NONE(0.00)[209.85.208.52:from]; ASN(0.00)[asn:15169, ipnet:209.85.128.0/17, country:US]; MLMMJ_DEST(0.00)[freebsd-net@freebsd.org]; MIME_TRACE(0.00)[0:+,1:+,2:~]; ARC_NA(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; RCVD_TLS_LAST(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; TAGGED_FROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DMARC_NA(0.00)[freebsd.org]; TO_DN_NONE(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_NEQ_ENVFROM(0.00)[driesm@FreeBSD.org,driesmmichiels@gmail.com] X-ThisMailContainsUnwantedMimeParts: N This is a multipart message in MIME format. ------=_NextPart_000_007E_01D8C9FC.4B2DBD60 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hmm this mail was not finished, sorry about that. I will include the link that fell-off, 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 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: ------=_NextPart_000_007E_01D8C9FC.4B2DBD60 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hmm this = mail was not finished, sorry about that.

I will include the link that = fell-off, = 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:

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