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[Qemu-discuss] port forward not work when using with macvtap

From: Li Feng
Subject: [Qemu-discuss] port forward not work when using with macvtap
Date: Thu, 21 Jun 2018 11:50:03 +0800

Hi all,

I create a vm with a macvtap network and a nat network.

netdev user,id=fl.1,hostfwd=tcp::5555-:22 \
-device e1000,netdev=fl.1 \
-net nic,model=virtio,macaddr=$(< /sys/class/net/macvtap0/address) \
-net tap,fd=3 3<>/dev/tap$(< /sys/class/net/macvtap0/ifindex)
I create two network cards because the macvtap ip is got from dhcp, and I
have to login from vnc to get it.
So I add a nat card to use as port forward to login from ssh.

The macvtap works well with a dhcp ip.
However, the port forwd on nat isn't work. If I delete the macvtap from
qemu command, the port forwd works well.

On host, the port 5555 is listenning.
tcp        0      0  *               LISTEN

But I couldn't login in ssh with using ` ssh -p 5555`, it
will hang.
 `ssh -p 5555 ` could success.

Anyone know how to fix this issue?

Millions of thanks.


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