I'm having this error when I try to test the connection to the port 1521 in another server.
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telnet other_server 1521
Trying other_server ...
telnet: connect to address other_server: No route to host
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service firewalld status
Redirecting to /bin/systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:firewalld(1)
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netstat -anp | grep 1521
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 0.0.0.0:1521 0.0.0.0:* LISTEN 14487/tnslsnr
tcp 0 0 172.16.207.6:1521 172.16.207.6:10512 ESTABLISHED 14487/tnslsnr
tcp 0 0 172.16.207.6:10512 172.16.207.6:1521 ESTABLISHED 5865/ora_pmon_prote
What else could be?
Regards