valamiert az ipv4 25 portok zarva vannak meg google-on is, csak ipv6 on tudom kinytni telnet-el a ipv6-on, masnak is volt ilyen?
 
	 
 
	patrikx3@demona:~$ sudo  -i 
	Please touch the device. 
	root@demona:~# telnet -6 corifeus.eu 25 
	Trying 2a01:4f8:200:4491::2... 
	Connected to corifeus.eu. 
	Escape character is '^]'. 
	220 corifeus.com ESMTP 
	quit 
	221 2.0.0 Bye 
	Connection closed by foreign host. 
	root@demona:~# telnet -4 corifeus.eu 25 
	Trying 144.76.168.177... 
	^C 
	root@demona:~# telnet -4 corifeus.eu 465 
	Trying 144.76.168.177... 
	Connected to corifeus.eu. 
	Escape character is '^]'. 
	quit 
	Connection closed by foreign host. 
	root@demona:~# telnet -4 corifeus.eu 587 
	Trying 144.76.168.177... 
	Connected to corifeus.eu. 
	Escape character is '^]'. 
	220 corifeus.com ESMTP 
	quit 
	221 2.0.0 Bye 
	Connection closed by foreign host. 
	root@demona:~# telnet -4 corifeus.eu 993 
	Trying 144.76.168.177... 
	Connected to corifeus.eu. 
	Escape character is '^]'. 
	quit 
	Connection closed by foreign host. 
	root@demona:~# telnet -6 corifeus.eu 25 
	Trying 2a01:4f8:200:4491::2... 
	Connected to corifeus.eu. 
	Escape character is '^]'. 
	220 corifeus.com ESMTP 
	quit 
	221 2.0.0 Bye 
	Connection closed by foreign host. 
	root@demona:~#