asked on

starting tomcat ipv4

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:sunrpc 0.0.0.0:* LISTEN 1/systemd
tcp 0 0 0.0.0.0:8817 0.0.0.0:* LISTEN 5308/mongod
tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN 652/sshd
tcp 0 0 localhost:smtp 0.0.0.0:* LISTEN 907/master
tcp 0 0 localhost:32000 0.0.0.0:* LISTEN 2418/java
tcp 0 0 localhost:27017 0.0.0.0:* LISTEN 1797/mongod
tcp6 0 0 [::]:monkeycom [::]:* LISTEN 2418/java
tcp6 0 0 [::]:sunrpc [::]:* LISTEN 1/systemd
tcp6 0 0 [::]:webcache [::]:* LISTEN 3387/java
tcp6 0 0 [::]:http [::]:* LISTEN 4534/httpd
tcp6 0 0 [::]:ssh [::]:* LISTEN 652/sshd
tcp6 0 0 [::]:ddi-tcp-1 [::]:* LISTEN 28290/node
tcp6 0 0 localhost:smtp [::]:* LISTEN 907/master
tcp6 0 0 [::]:https [::]:* LISTEN 4534/httpd
tcp6 0 0 localhost:mxi [::]:* LISTEN 3387/java
tcp6 0 0 [::]:8009 [::]:* LISTEN 3387/java
udp 0 0 0.0.0.0:sunrpc 0.0.0.0:* 21076/rpcbind
udp 0 0 0.0.0.0:899 0.0.0.0:* 21076/rpcbind
udp6 0 0 [::]:sunrpc [::]:* 21076/rpcbind
udp6 0 0 [::]:899 [::]:* 21076/rpcbind

why services are starting with tcp6? can people access from outside ?

ASKER CERTIFIED SOLUTION

arnold

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ittechlab

ASKER

I am trying to find out why some daemon or service using tcp6 version?

tcp6 0 0 localhost:smtp [::]:* LISTEN 907/master

arnold

ISA long as you have networkv6 set to active, different apps use that to identify to what to bind especially when you set an app to bind to all available network interfaces, that includes IPv6 when it is active.