Re: IPv4 localhost network problem

[jeff d <fixedored@gmail.com>]

Sent from my coffee machine

On Dec 29, 2009, at 7:36 AM, martin <martin.juhlin@home.se> wrote:

> On Tuesday 29 December 2009 14.26.51 jeff dickison wrote:
> > On Dec 29, 2009, at 7:07 AM, martin <martin.juhlin@home.se> wrote:
> > > Hi,
> > >
> > > I have problem with IPv4 on my local network. Applications that is
> > > trying to
> > > connect to localhost with IPv4 gets “connection refused”. I have
> > > constructed a
> > > simple Java program that is triggering the problem. The program
> > > simple just
> > > N
> > >
> > > Starting by doing the following:
> > >   $ java DummyServer 7000
> > >
> > > When testing with telnet:
> > >   $ telnet -4 localhost 7000
> > >   Trying 127.0.0.1...
> > >   telnet: Unable to connect to remote host: Connection refused
> > >
> > >   $ telnet -6 localhost 7000
> > >   Trying ::1...
> > >   Connected to ip6-localhost.
> > >
> > > Any ideas what can be wrong?
> > >
> > >  Martin
> > > <DummyServer.java>
> >
> > Hi Martin,
> > What's the output of:
> > sudo lsof -i:7000
>
> The output is as following:
>
> $ sudo lsof -i:7000
> COMMAND  PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
> java    6130 martin    4u  IPv6  66197      0t0  TCP *:afs3- 
> fileserver(LISTEN)
> $
>
>   Martin

So, this shows us its only listening on ipv6 and not on ipv4.  Just a  
guess, but I would suspect that there might be an issue with the java  
app.  Are you seeing this issue with other apps?