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

[Apteryx]

That's rather embarrassing, but the problem with my VM was that it was
lacking networking support.  I turned this (too) minimal example of a
Guix System:

;;; file: os.scm
(use-modules (gnu services ssh)
             (gnu system)
             (gnu tests))

(simple-operating-system
 (service openssh-service-type
          (openssh-configuration
           (permit-root-login #t)
           (allow-empty-passwords? #t)
           (log-level 'debug))))

Into:
;;; file: os.scm
(use-modules (gnu services networking)
             (gnu services ssh)
             (gnu system)
             (gnu tests))

(simple-operating-system
 (service dhcp-client-service-type)
 (service openssh-service-type
          (openssh-configuration
           (permit-root-login #t)
           (allow-empty-passwords? #t)
           (log-level 'debug))))

After which using the '-nic user,hostfwd=tcp::3333-:22' allowed me to
SSH to localhost port 3333 successfully.  Closing!

** Changed in: qemu
       Status: Confirmed => Invalid

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

Title:
  -net user,hostfwd=... is not working

Status in QEMU:
  Invalid

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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