Determine what service listening on port

[Romeo Theriault]

The -sV option on nmap would give you service version information. You might
also want to try connecting to the ports with telnet to see what they might
show.

On 7/13/07, joseph tacuyan <joseph.mailboxlist at gmail.com> wrote:
>
> how about nmapping it?
>
> On 7/13/07, redhat at buglecreek.com <redhat at buglecreek.com> wrote:
> >
> > I have a RHEL ES3 server that has three listening udp ports open.  I'm
> > having a hard time trying to determine what service opened them up.  The
> > ports are udp 1020,1022,1023.  I have tried to following: "netstat -lp",
> > the PID/Program name column just shows a -,  "fuser -n udp 1020",
> > nothing returned, lsof -i :1020. nothing returned.  I have shut down a
> > few services in an attempt to discover who opened the ports, but no
> > luck.  Anything I may have forgotten?
> >
> > Thanks
> >
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