From nobody Tue Nov 12 16:34:53 2024 X-Original-To: questions@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 4XnsTG0hNQz5cmgM for ; Tue, 12 Nov 2024 16:34:58 +0000 (UTC) (envelope-from freebsd@dreamchaser.org) Received: from ns.dreamchaser.org (ns.dreamchaser.org [66.109.141.57]) (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 ECDSA (P-256) client-digest SHA256) (Client CN "discoveriesinwood.com", Issuer "E5" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4XnsTD4BKpz4f3t for ; Tue, 12 Nov 2024 16:34:56 +0000 (UTC) (envelope-from freebsd@dreamchaser.org) Authentication-Results: mx1.freebsd.org; dkim=none; spf=pass (mx1.freebsd.org: domain of freebsd@dreamchaser.org designates 66.109.141.57 as permitted sender) smtp.mailfrom=freebsd@dreamchaser.org; dmarc=none Received: from [192.168.151.122] (breakaway.dreamchaser.org [192.168.151.122]) by ns.dreamchaser.org (8.18.1/8.18.1) with ESMTP id 4ACGYr0D004887 for ; Tue, 12 Nov 2024 09:34:53 -0700 (MST) (envelope-from freebsd@dreamchaser.org) Message-ID: <76101826-4507-4db4-b7dc-4abb90641713@dreamchaser.org> Date: Tue, 12 Nov 2024 08:34:53 -0800 List-Id: User questions List-Archive: https://lists.freebsd.org/archives/freebsd-questions List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-questions@freebsd.org Sender: owner-freebsd-questions@FreeBSD.org MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: missing ARP reply To: questions@freebsd.org References: <0f00ea1a-8b62-4c0d-80ee-08721794483b@dreamchaser.org> Content-Language: en-US Reply-To: freebsd@dreamchaser.org From: Gary Aitken In-Reply-To: <0f00ea1a-8b62-4c0d-80ee-08721794483b@dreamchaser.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Greylist: inspected by milter-greylist-4.6.4 (ns.dreamchaser.org [192.168.151.101]); Tue, 12 Nov 2024 09:34:53 -0700 (MST) for IP:'192.168.151.122' DOMAIN:'breakaway.dreamchaser.org' HELO:'[192.168.151.122]' FROM:'freebsd@dreamchaser.org' RCPT:'' X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.4 (ns.dreamchaser.org [192.168.151.101]); Tue, 12 Nov 2024 09:34:53 -0700 (MST) X-Spamd-Result: default: False [-2.30 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-0.998]; R_SPF_ALLOW(-0.20)[+mx]; NEURAL_HAM_SHORT(-0.11)[-0.109]; ONCE_RECEIVED(0.10)[]; MIME_GOOD(-0.10)[text/plain]; XM_UA_NO_VERSION(0.01)[]; RCPT_COUNT_ONE(0.00)[1]; ASN(0.00)[asn:21947, ipnet:66.109.128.0/19, country:US]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_ONE(0.00)[1]; FROM_HAS_DN(0.00)[]; R_DKIM_NA(0.00)[]; ARC_NA(0.00)[]; TO_DN_NONE(0.00)[]; REPLYTO_ADDR_EQ_FROM(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DMARC_NA(0.00)[dreamchaser.org]; PREVIOUSLY_DELIVERED(0.00)[questions@freebsd.org]; MLMMJ_DEST(0.00)[questions@freebsd.org]; HAS_REPLYTO(0.00)[freebsd@dreamchaser.org] X-Rspamd-Queue-Id: 4XnsTD4BKpz4f3t X-Spamd-Bar: -- On 11/11/24 21:36, Gary Aitken wrote: > I'm having trouble with my solar inverter connecting to its home > base somewhere in Germany and am suspecting a problem with a missing > ARP reply. ... > xxx.yyy is the inverter on the local network xxx.zzz is the fbsd > gateway/router on the local network > > #tcpdump -flnt -i fxp0 | grep 192.168.xxx.yyy ARP, Request who-has > 192.168.xxx.zzz (aa:bb:cc:dd:ee:ff) tell 192.168.xxx.yyy, length 46 > IP 192.168.xxx.yyy.3337 > 147.185.237.1.22222: Flags [.], seq > 26043:26065, ack 708198036, win 2144, length 22 IP > 147.185.237.1.22222 > 192.168.xxx.yyy.3337: Flags [P.], seq 1:23, ack > 22, win 18410, length 22 IP 192.168.xxx.yyy.3337 > > 147.185.237.1.22222: Flags [.], ack 23, win 2144, length 0 > > I'm guessing the 3 packets exchanged are a power optimizer reporting > in, but may be the inverter doing something. > > The arp table on xxx.zzz has a permanent entry for itself on the > interface, picked up from /etc/hosts: > > # arp -a ns.dreamchaser.org (192.168.xxx.zzz) at aa:bb:cc:dd:ee:ff on > fxp0 permanent [ethernet] > > Thoughts on why I am not seeing a reply to the ARP request? My error; tcpdump does not print the destination host address in the ARP reply, so grep didn't catch it. duh. Should have been tcpdump -flnt -i fxp0 | grep ARP or tcpdump -flnt -i fxp0 | grep aa:bb:cc:dd:ee:ff Gary