What does tcp6 mean in netstat?
tcp6 refers to the TCP/IP version 6 (IPv6) protocol that your apache is using to connect to the external host. Just tcp would mean that the TCP/IP version 4 (IPv4) that is being used. – debal. Mar 20 ’14 at 8:49.
What does listening mean in netstat?
LISTENING means that a service is listening for connections on that port. Once a connection is established it will be ESTABLISHED, and you’ll have a matching foreign address on the line. Other states you might see during the setup and shutdown stages include SYN_SENT and TIME_WAIT.
What does :: 1 mean in netstat?
0.0″, which, when LISTEN is specified, means “any IP address.” You might also see “::1” which is the IPv6 loopback address. In IPv6, a colon separates every 16 bits, or 4 hex digits. However, consecutive zeroes in the address can be “collapsed” or omitted one time in any IPv6 address. Even if the address is all zeroes.
What does the output of netstat say about tcp6?
Please anyone explain the follow output of netstat: What does tcp6 mean? tcp6 simply means TCP protocol over IP v6. tcp6: The protocol used. Here it is TCP over IPv6 0: The count of bytes not copied by the user program connected to this socket.
Which is protocol does netstat show the connection?
Shows connections for the protocol specified by Protocol. In this case, the Protocol can be tcp, udp, tcpv6, or udpv6. If this parameter is used with -s to display statistics by protocol, Protocol can be tcp, udp, icmp, ip, tcpv6, udpv6, icmpv6, or ipv6.
What does it mean to use TCP over IP v6?
tcp6 simply means TCP protocol over IP v6. tcp6: The protocol used. Here it is TCP over IPv6 0: The count of bytes not copied by the user program connected to this socket. 0: The count of bytes not acknowledged by the remote host. Local Address
Why are some SSHD sockets identified as tcp6 / udp6?
After you make any changes to sshd_config restart sshd for the changes to take effect. Basically, even if you completely disable IPv6, some sockets will get identified as “TCP6/UDP6” due to curious kernel reasons.