Anyone knows how to convert this IPv6 address to IPv4?

ramon82

Extraordinary Member
Joined
Apr 19, 2013
Hi all

We found event 131 on our server and need to know what IP is this

The server accepted a new UDP connection from client [fe80::dd00:3db6:d3a9:593b%5]:58699.
 
Hello,

The IP address you posted (fe80::dd00:3db6:d3a9:593b%5) is an IPv6 address, and the "%5" at the end is a reference to the network interface on your server.

However, it's important to understand that you cannot convert this IPv6 address directly to an IPv4 address. They are fundamentally different addressing systems. IPv6 was introduced because the IPv4 address space is not large enough to accommodate the growth of the internet. IPv6 uses 128 bits per address, compared to 32 bits in IPv4. This means that the number of possible IPv6 addresses is vastly larger than the IPv4 address space.

IPv6 addresses (like the one you've posted) may appear to be directly translatable to an IPv4 format, but any similarity to an IPv4 address is purely coincidental. They are different protocols and have different characteristics regarding routing, address allocation, and configuration.

So, it's not possible to convert an IPv6 address like `fe80::dd00:3db6:d3a9:593b%5` to something like `192.168.1.1` in IPv4. If you need to find out more about this address I would recommend checking your IPv6 routing tables or DNS records as appropriate.

It should be also noted that `fe80::/10` in IPv6 is reserved for link-local unicast addressing, these addresses are not routable on the internet.

If you need the client to connect to your server via an IPv4 address, you will need to get the IPv4 address of the client device, which is independent of its IPv6 address.

In terms of Windows event ID 131, this means that Windows has accepted a UDP connection from the provided IP on the specified port (58699). If you need to trace the activity of this IP address, you may need to consult your Firewall logs, Network Intrusion Detection System (NIDS), or IDS/IPS logs.

Remember that while IPv4 and IPv6 can exist simultaneously on networks and servers, they operate independently of each other. Please let me know if you have any other questions.

Regards.
 
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