From nobody Fri Aug 26 11:53:49 2022 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4MDdXX2fMyz4Zx50 for ; Fri, 26 Aug 2022 11:54:04 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:c2c:26d8::2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4MDdXW3KLCz40Dm for ; Fri, 26 Aug 2022 11:54:03 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221] (may be forged)) by hz.grosbein.net (8.16.1/8.16.1) with ESMTPS id 27QBrvWG015087 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 26 Aug 2022 11:53:58 GMT (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: wojtek@puchar.net Received: from [10.58.0.11] (dadvw [10.58.0.11] (may be forged)) by eg.sd.rdtc.ru (8.16.1/8.16.1) with ESMTPS id 27QBrvBu044667 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 26 Aug 2022 18:53:57 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: ipfw nat problem To: Wojciech Puchar References: <623ac39e-2915-463a-9e4c-9f99bae28c69@puchar.net> <57a9cad0-c2ef-6e1f-2185-0f7563fe3758@grosbein.net> <90b59493-95d6-5b2a-b0dc-2fece0a9df7b@puchar.net> Cc: freebsd-hackers@freebsd.org From: Eugene Grosbein Message-ID: <71545bb7-a5ea-510f-8d67-4f07fe0887ae@grosbein.net> Date: Fri, 26 Aug 2022 18:53:49 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 In-Reply-To: <90b59493-95d6-5b2a-b0dc-2fece0a9df7b@puchar.net> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT autolearn=disabled version=3.4.2 X-Spam-Report: * -0.0 SHORTCIRCUIT No description available. * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on hz.grosbein.net X-Rspamd-Queue-Id: 4MDdXW3KLCz40Dm X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=fail (mx1.freebsd.org: domain of eugen@grosbein.net does not designate 2a01:4f8:c2c:26d8::2 as permitted sender) smtp.mailfrom=eugen@grosbein.net X-Spamd-Result: default: False [-2.10 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_SPF_FAIL(1.00)[-all]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; FROM_EQ_ENVFROM(0.00)[]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; MIME_TRACE(0.00)[0:+]; R_DKIM_NA(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/32, country:DE]; ARC_NA(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; RCVD_TLS_ALL(0.00)[]; FREEFALL_USER(0.00)[eugen]; TO_MATCH_ENVRCPT_SOME(0.00)[]; FROM_HAS_DN(0.00)[]; DMARC_NA(0.00)[grosbein.net]; TO_DN_SOME(0.00)[]; MID_RHS_MATCH_FROM(0.00)[] X-ThisMailContainsUnwantedMimeParts: N 26.08.2022 17:42, Wojciech Puchar wrote: > Anyway - with ip.forwarding on ssh still disconnect randomly. Just after much larger amount of data transmitted (like 10-100MB, not <1MB) > > Just on this server. Any ideas what may be wrong? Maybe you use ipfw nat (or natd) and forgot to disable TSO on external interface, so some packets get broken as TSO is not compatible with libalias. I've read some reports that pfnat may have problems with TSO, too.