I apologize. I forgot the details. Nmap uses its own services file, in
/usr/share/nmap. Long time ago, I made that file a link to
/etc/services. That, however, is not a default.
On 7/29/2020 8:34 PM, Sayan Malakshinov wrote:
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.
