Determine what service listening on port
Mike Burger
mburger at bubbanfriends.org
Sat Jul 14 11:21:50 UTC 2007
For the record...telnet is a TCP based client and server. You can not
connect to a UDP service with a TCP client, such as telnet, in order to
determine anything.
> 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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--
Mike Burger
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