Date: Wed, 24 Oct 2018 18:39:17 -0700 (MST) From: star <hegui_you@126.com> To: freebsd-net@freebsd.org Subject: IP_BINDANY(SYN_SENT ): return packets not accepted by kernel Message-ID: <1540431557414-0.post@n6.nabble.com>
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Hello all, I am testing IP_BINDANY functionality with a small C program. I can bind to a foreign (non existing) address, and syn packets are being sent with the bound source IP address and port. Return (ACK) packets are reaching the host (I can see the SYN-ACK packet in tcpdump), but the third packet in TCP handshake is not getting generated. It looks like the second SYN-ACK is not getting accepted by the kernel. <http://freebsd.1045724.x6.nabble.com/file/t354462/TIM%E5%9B%BE%E7%89%8720181024175304.png>; My ipfw: root@bsd:~ # ipfw list 00100 fwd 127.0.0.1,3128 tcp from any to any 80 in recv igb1 00300 fwd 127.0.0.1 ip from any to any uid 0 in recv igb0 65534 allow ip from any to any 65535 deny ip from any to any Refer to other pages: http://freebsd.1045724.x6.nabble.com/IP-BINDANY-return-packets-not-accepted-by-kernel-td4017905.html but not work! can anybody help me? Thanks -- Sent from: http://freebsd.1045724.x6.nabble.com/freebsd-net-f4005075.html
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