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[Bug 1414466] Re: -net user, hostfwd=... is not working(qemu-system-aarc


From: srinivasan magudeeswaran
Subject: [Bug 1414466] Re: -net user, hostfwd=... is not working(qemu-system-aarch64)
Date: Mon, 19 Oct 2020 13:58:39 -0000

Is this issue resolved.?

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https://bugs.launchpad.net/bugs/1414466

Title:
  -net user,hostfwd=... is not working(qemu-system-aarch64)

Status in QEMU:
  Confirmed

Bug description:
  QEMU version: git a46b3aaf6bb038d4f6f192a84df204f10929e75c

   /opt/qemu.git/bin/qemu-system-aarch64 --version
  QEMU emulator version 2.2.50, Copyright (c) 2003-2008 Fabrice Bellard

  Hosts:
  ovs - host machine (Ubuntu 14.04.1, x86_64)
  debian8-arm64 - guest 

  Guest start:
  user@ovs:~$ /opt/qemu.git/bin/qemu-system-aarch64 -machine virt -cpu 
cortex-a57 -nographic -smp 1 -m 512 -kernel vmlinuz-run -initrd initrd-run.img 
-append "root=/dev/sda2 console=ttyAMA0" -global virtio-blk-device.scsi=off 
-device virtio-scsi-device,id=scsi -drive 
file=debian8-arm64.img,id=rootimg,cache=unsafe,if=none -device 
scsi-hd,drive=rootimg -netdev user,id=unet -device 
virtio-net-device,netdev=unet -net user,hostfwd=tcp:127.0.0.1:1122-:22

  root@debian8-arm64:~# netstat -ntplu | grep ssh
  tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN    
  410/sshd        
  tcp6       0      0 :::22                   :::*                    LISTEN    
  410/sshd       

  (no firewall in guest vm)

  user@ovs:~$ netstat -ntplu | grep 1122
  tcp        0      0 127.0.0.1:1122          0.0.0.0:*               LISTEN    
  18722/qemu-system-a

  user@ovs:~$ time ssh user@127.0.0.1 -p 1122
  ssh_exchange_identification: read: Connection reset by peer

  real  1m29.341s
  user  0m0.005s
  sys   0m0.000s

  Inside guest vm sshd works fine:
  root@debian8-arm64:~# ssh user@127.0.0.1 -p 22
  user@127.0.0.1's password: 
  ....
  user@debian8-arm64:~$ exit
  logout
  Connection to 127.0.0.1 closed.

  root@debian8-arm64:~# ssh user@10.0.2.15 -p 22
  user@10.0.2.15's password: 
  ...
  user@debian8-arm64:~$ exit
  logout
  Connection to 10.0.2.15 closed.

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