ndt-users list created

[Richard Carlson <>]

Hi Clay;

At 05:58 PM 8/27/2007, Clayton Keller wrote:
> Is it possible to add the -m switch with the current switches in place?
>
> /usr/local/sbin/web100srv -4 -a -m -l /var/log/web100/web100srv.log

Yes, this is a valid set of options.  The "-m" flag just says the 
server can handle multiple clients at the same time.

> Like the above, or is there going to be an issue with the -m? I did 
> a quick test and now am getting a protocol error again now that the 
> -m is in place, but could this be a firewall issue?

I suspect a firewall issue.  The '-m' option causes the server to 
user ephemeral ports for the client tests.  It simply opens a pair of 
sockets, grabs the port number the OS assigned and sends those port 
numbers to the client over the command channel.  Having ephemeral 
ports blocked by a firewall will cause the tests to fail.

> Also, is there a place to specify the max number of simultaneous 
> tests. I apologize for all the questions, but it's been about 3 
> years since the last configuration, and the documentation on my part 
> was less than stellar.

No, there is no explicit option to set the number of simultaneous 
tests.  However, you may be able to do this implicitly using the 
"--mrange min:max" option.  The mrange options lets you specify a 
range of port numbers that the server can use.  Specifying 6 ports 
may limit you to 3 simultaneously tests.  The web100srv man page has 
the details.

Rich
> Clay
>
> Clayton Keller wrote:
> > It's running now, thanks Rich! I'll continue my tests.
> > Are there known issues with IPv6 and the current release?
> > Clay
> > Richard Carlson wrote:
> > > Hi Clay;
> > >
> > > What happens if you force the web100srv process to us IPv4 
> > > addresses (add the "-4" option to the command line?
> > >
> > > Rich
> > >
> > > At 03:44 PM 8/27/2007, Clayton Keller wrote:
> > > > I am working on my VMWare based installation.
> > > >
> > > > I have recompiled the kernel with the web100 patches:
> > > >
> > > >         # grep Web /var/log/dmesg
> > > >         Web100: initiailizing hash table of size 32768 (order 5)
> > > >         Web100 2.5.12 200609221010 net100: Initialization successful
> > > >
> > > >         # cat /proc/web100/header
> > > >         2.5.12 200609221010 net100
> > > >         <snip>
> > > >
> > > > When I am trying to perform the test, I get the following output:
> > > >         TCP/Web100 Network Diagnostic Tool v5.5.1
> > > >         click START to begin
> > > >         Connected to: 192.168.213.128  --  Using IPv4 address
> > > >         Checking for Middleboxes . . . . . . . . . . . . . . . . 
> > > > . ..Protocol error!
> > > >         Middlebox test FAILED!
> > > >         checking for firewalls . . . . . . . . . . . . . . . . . . .
> > > > Protocol error!
> > > >         Simple firewall test FAILED!
> > > >         running 10s outbound test (client-to-server [C2S]) . . . 
> > > > . . Protocol error!
> > > >         C2S throughput test FAILED!
> > > >         running 10s inbound test (server-to-client [S2C]) . . . 
> > > > . . . Protocol error!
> > > >         S2C throughput test FAILED!
> > > >         Protocol error!
> > > >
> > > > The following ports are opened up on the firewall:
> > > >
> > > > -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 
> > > > 3001 -j ACCEPT
> > > > -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 
> > > > 3002 -j ACCEPT
> > > > -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 
> > > > 3003 -j ACCEPT
> > > > -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 
> > > > 7123 -j ACCEPT
> > > >
> > > > And the services are being ran as such:
> > > >
> > > >         /usr/local/sbin/web100srv -a -l /var/log/web100/web100srv.log
> > > >         /usr/local/sbin/fakewww -l /var/log/web100/fakewww.log
> > > >
> > > > I removed the -m option to keep the issue of random ports needing 
> > > > to be opened for multiple connections while I am still in this 
> > > > initial testing phase.
> > > >
> > > > I am using the following software versions:
> > > >
> > > >         web100-2.5.12-200609221010
> > > >         web100_userland-1.6
> > > >         ndt-3.4.1
> > > >
> > > > Any help would be appreciated, if I'm needing to run some debug 
> > > > I'd be happy to do so, but I'm just curious what I should be 
> > > > looking for at this point.
> > >
> > > ------------------------------------
> > >
> > >
> > >
> > > Richard A. Carlson                              e-mail: 
> > >
> > > Network Engineer                                phone:  (734) 352-7043
> > > Internet2                                       fax:    (734) 913-4255
> > > 1000 Oakbrook Dr; Suite 300
> > > Ann Arbor,  MI  48104

------------------------------------



Richard A. Carlson                              e-mail: 

Network Engineer                                phone:  (734) 352-7043
Internet2                                       fax:    (734) 913-4255
1000 Oakbrook Dr; Suite 300
Ann Arbor,  MI  48104