Re: Finding TNS listener ports

Hi Mladen,

nmap thinks that only 1521 is an Oracle port, so in case of several listeners on different ports it can't determine real service behind them. For example, I have 2 different listeners on 1521 and 1522, but nmap returns only 1521 as an Oracle service. Moreover, by default nmap scans just the most common 1,000 ports for each protocol, so with default parameters it will not find 1522. The same thing with sshd - I reconfigured it to 1122 and nmap returns 'availant-mgr' for it.

On Thu, Jul 30, 2020 at 3:21 AM Mladen Gogala <gogala.mladen_at_gmail.com> wrote:

> That is still much more cumbersome than nmap:
>
> [root_at_ora19c oracle]# nmap localhost|grep oracle
> 1521/tcp open oracle
> [root_at_ora19c oracle]#
>
> On 7/29/20 4:34 PM, Radoulov, Dimitre wrote:
> >
> > On Solaris I would use something like this:
> >
> > pgrep -lf '[t]nslsnr' |
> > while read p x l x; do
> > printf 'listener %s is listening on the following
> > interfaces/ports:\n' "$l"
> > pfiles "$p" |
> > nawk '/sockname: AF_INET / && !/0.0.0.0/ {
> > _[$3] = $5
> > } END {
> > for (__ in _) print __, _[__]
> > }'
> > done
> >
> >
> --
> Mladen Gogala
> Database Consultant
> Tel: (347) 321-1217
>
> --
> http://www.freelists.org/webpage/oracle-l
>
>
>

-- 
Best regards,
Sayan Malakshinov
Oracle performance tuning engineer
Oracle ACE Associate
http://orasql.org

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