There is a checksum problem with the traceroute packets
generated by the gRouter. I am fixing it now. Will release
the revised code very soon.


| Muthucumaru Maheswaran                Web:   |
| School of Computer Science            Email: [EMAIL PROTECTED]      |
| McGill University                     Phone: (514) 398-1465             |
| 213B McConnell Engineering Building   Fax: (514) 398-3883               |
| 3480 University Street                                                  |
| Montreal, QC H3A 2A7, Canada                                            |

On Sat, 20 Sep 2008, Daniel Ng wrote:

> For the auto-routing between 3 routers, an easier fix is just to compile 
> twice, without disabling anything.  This was tested with auto-routing and 
> auto-gen IP/MAC both enabled.
> ________________________________________
> From: Alexis Malozemoff [EMAIL PROTECTED]
> Sent: September 19, 2008 7:04 PM
> To: Daniel Ng
> Subject: Re: ssh on UMLs
> SSH works.  You need to start sshd on the server.  The command is
> /usr/sbin/sshd (you need the full path).
> I've created the topology in parts 2 and 3 in GINI and it works fine.
> You may need to fiddle around with saving the file and toggling route
> computation, but in the end I've made it work.  Are you getting all
> the "nexthop address not found" errors when compiling?  That's what I
> got before, but randomly toggling the ip/mac and route generation
> fixed it.  Maybe something we should fix in the next version...
> For traceroute, I believe the issue is with the router.  Maybe the
> professor can confirm this.
> Also, is the password for the filesystem, just4now, documented
> anywhere?  Should I send an e-mail to everyone in the class?
> Otherwise, they can't really use SSH.
> Alex
> On Fri, Sep 19, 2008 at 5:28 PM, Daniel Ng <[EMAIL PROTECTED]> wrote:
> > We tried ssh'ing between UMLs and this still doesn't work.  It seems that 
> > assignment 1 will need this feature.  Is it going to be fixed?  We keep 
> > getting the port 22: Connection refused error.
> >
> > Also, we ran into a strange bug when designing the second topology of the 
> > assignment.  It seems that interconnecting 3 routers in a triangular shape 
> > does not auto generate the routes properly.  It does most of the job, but a 
> > few nexthop addresses were incomplete.  Fixing this in the code might be 
> > tricky so I'm not sure if I can finish it over the weekend, but I'll give 
> > it a try.  Fixing it manually is not hard.  We can just disable autorouting 
> > and then fill in any incomplete (e.g. 192.168.1.) addresses.
> >
> > Another problem we ran into is using traceroute between 2 UMLs.  I vaguely 
> > remember using traceroute with GINI before and it worked fine, but maybe 
> > that was with the old router.  When we do traceroute now, it only gives us 
> > a bunch of *s instead of addresses.  From reading the man pages, it seems 
> > that this problem is usually the case when ttl for the packets is set too 
> > low.  Do you know if this is because of the router?
> >
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