From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marco Gaiarin Date: Wed, 10 Feb 2021 09:15:07 +0000 Subject: Again policy routing and OUTPUT... Message-Id: <20210210091507.GD3677@sv.lnf.it> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: lartc@vger.kernel.org Rewiewing the mark and saving/restoring of the marks in the chain seems was useful, and now the policy routing for local-generated traffic works as expected. Apart one little thing... local service (exim SMTP server, indeed) open outgoing connection using one of the available interface, and this happen: 1 0.000000000 10.5.248.254 → 108.177.126.27 TCP 74 46008 → 25 [SYN, ECN, CWR] Seq=0 Win)200 Len=0 MSS60 SACK_PERM=1 TSval1379463 TSecr=0 WS8 2 1.027849378 10.5.248.254 → 108.177.126.27 TCP 74 [TCP Retransmission] 46008 → 25 [SYN] Seq=0 Win)200 Len=0 MSS60 SACK_PERM=1 TSval1379720 TSecr=0 WS8 3 3.043787137 10.5.248.254 → 108.177.126.27 TCP 74 [TCP Retransmission] 46008 → 25 [SYN] Seq=0 Win)200 Len=0 MSS60 SACK_PERM=1 TSval1380224 TSecr=0 WS8 4 7.139530714 10.5.248.254 → 108.177.126.27 TCP 74 [TCP Retransmission] 46008 → 25 [SYN] Seq=0 Win)200 Len=0 MSS60 SACK_PERM=1 TSval1381248 TSecr=0 WS8 eg, traffic get correctly routed to the choosen interface via policy routing, but source IP was 'a random interface IP' in the available pool. I can use SNAT to change source IP but... there's some more 'elegant' solution? Surely, best solution would be to work as 'application level', eg instruct exim to use for some traffic only the scecific source interface but... seems not possible, or too complex to achive. Thanks. -- dott. Marco Gaiarin GNUPG Key ID: 240A3D66 Associazione ``La Nostra Famiglia'' http://www.lanostrafamiglia.it/ Polo FVG - Via della Bontà, 7 - 33078 - San Vito al Tagliamento (PN) marco.gaiarin(at)lanostrafamiglia.it t +39-0434-842711 f +39-0434-842797 Dona il 5 PER MILLE a LA NOSTRA FAMIGLIA! http://www.lanostrafamiglia.it/index.php/it/sostienici/5x1000 (cf 00307430132, categoria ONLUS oppure RICERCA SANITARIA)