[Dxspider-support] Node verification

[Mike McCarthy, W1NR]

I'm not talking about REVERSE DNS, only the DNS address that is used for 
the users that connect to the node. Even a dynamic ones have a DNS entry 
via noip.com that users use to connect. DNS is VERY difficult to spoof. 
And, I am only talking about the node connection at the host node.

Connection request comes in. Lookup says it's callsign is a node. It has 
an IP it is connecting from. Lookup in a table the DNS for that node 
call. Do a DNS query and match the IP address. If no match, drop. If a 
match, allow. Those with dynamic IP's might have a period where the DNS 
servers need to flush their caches, but TTL should be set to 5 minutes.

You would only need to maintain a table of DNS names for the nodes that 
are using you as a feed.

On 2/10/2025 7:58 AM, Lists via Dxspider-support wrote:
> Unfortunately not every IP address has a reverse DNS (PTR) record plus a lot of end users are connected via networks with dynamic IPs that change on a regular basis.
> 
> Chris - G1FEF
> 


-- 
73 de Mike, W1NR

THAT was the equation. EXISTENCE!... SURVIVAL... must cancel out... 
programming!

- Ruk -