SSH tunnels/port forwarding still doesn't work

RouterOS General
1

Hi,

ROS 5.0, SSH client PuTTY on Windows.
I’m able to connect via SSH without problem but when I started port forwarding and succesfully connected to tunneled host,
PuTTY disconnects with message ‘Strange packet received: type 3.’ and ROS log says:

14:24:47 system,info,account user admin logged in from xxx.yyy.222.234 via ssh
14:25:31 ssh,error data not aligned to blocksize
14:25:31 ssh,error bad packet MAC
14:25:31 ssh,error packet not valid
14:25:31 system,info,account user admin logged out from xxx.yyy.222.234 via ssh

@MT staff
Is there any chance that this bug will be fixed in version 5.1?
This bug was mentioned by few forum users weeks ago.
SSH tunneling is realy useful feature, we need it working good.

Edit: Because ver. 5.1 was released, I should ask about fix in ver. 5.2 :smiley:

Regards,

RouterOS 5.1 is out!
2

Please, contact support with the same report (support@mikrotik.com).

3

there where fixes for ssh tunnels in 5.1 can you give more details on how to reproduce the problem? What board it is? What you are running over this tunnel?

4

@janisk
As I wrote earlier, PuTTy on Windows 2003 Server, connected via SSH to RB433AH without problem.
I was able to run port forwarding, traffic type was HTTP, I tried to check some settings on HP printer.
Other users reported similar problem here:
http://forum.mikrotik.com/t/help-please-ssh-tunnelling/45636/1
abeggled reported that is no problem on RB450G.
Maybe this is RB model specific issue?

Regards,

5

@janisk, sergejs
I found what’s wrong.
On this PC when I made SSH tunnels test, development version of PuTTY was installed instead of stable version.
My fault, I should check this twice instead of my complains :frowning:
I also made some tests on MS Windows 2003 Server, Win XP, Win 7 and everything works good :slight_smile:

Regards,

6

ditonet
abeggled > reported that is no problem on RB450G.
Maybe this is RB model specific issue?

@ditonet: in my experiance I also us “testversion” of PuTTY >0.60
Iwill test tomorrow with 0.60

7

For me it’s working with 5.0 and PuTTY 0.60 on RB450G.
I’m doing RDP-Tunnels.

8

@abeggled
Thanks for information, PuTTy ver. 0.60 seems to be good.
I have lack of time, maybe I’ll make some additional test on Firday.

Regards,

9

I’m running into this same issue.
Putty 0.61
Routeros 5.7
SSH Tunnel port 8080 to port 80
when ever I open chrome or IE to that port I get:
"Strange packet received: type 3 and disconnect.

10

dropped back down to ver .60 and it works again

11

The problem is also present on RouterOS 5.8 (running on an RB450) and Putty 0.60-2010-12-08 version from Ubuntu 11.04 64-bit. I can confirm Windows Putty version 0.60 running on Windows XP Professional does not have the problem when connected to the same RB450.

It looks like Ubuntu 11.10 upgraded the Putty version to 0.61-1. Being that the Ubuntu versions don’t behave the same way as the Windows versions, I have some hope the problem has been fixed in the new version.

12

can you send debug logs from client and from ssh server so we can look at them?

13

Putty log doesn’t show anything except the opening connection information. It doesn’t log the error that is displayed on the screen, apparently because Putty terminates before it can log the error.

The RB450 log shows that the user is logged in and out by ssh. It does not show that an error occurred to account for the logout.