New answers tagged netstat
The reason for this is because all IPv4 addresses are also IPv6 addresses. A small range of IPv6 addresses was set aside to be used for one-to-one mapping of IPv4 addresses. For example, the IPv4 address 192.0.2.128 is accessible via the IPv6 address ::ffff:192.0.2.128. This was done so that any applications which support IPv6 only, could still listen on ...
By default if you dont specify address to Apache Listen parameter, it handles ipv6 address using IPv4-mapped IPv6 addresses. You can take a look in Apache ipv6 The output of netstat doesn't mean Apache is not listening on IPv4 address. It's a IPv4-mapped IPv6 address.
When you execute netstat -tulpn it clearly shows Not all processes could be identified, non-owned process info will not be shown,you would have to be root to see it all.
from wikipedia On Linux, netstat (part of "net-tools") is deprecated, ss (part of iproute2) should be used instead. The net-tools package has not seen a Linux release in more than a decade. That's a long time to go without an update for a program suite designed to manage and monitor an ever-evolving kernel's communications interfaces - especially when ...
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