axfr-get: fatal: unable to parse AXFR results: protocol error and Solution

The axfr-get: fatal: unable to parse AXFR results: protocol error error message typically indicates that there was an issue with the communication between the axfr-get tool and the DNS server. This error can occur for a variety of reasons, including network connectivity issues, DNS server configuration problems, or incorrect usage of the axfr-get tool.

Here are a few potential solutions for this error:

1. Check your network connectivity and ensure that you can reach the DNS server from the machine where you are running the axfr-get tool. You can use the ping command to test the connectivity to the DNS server, and the dig command to query the DNS server and verify that it is responding properly.
2. Check the DNS server configuration and ensure that it is configured to allow zone transfers (AXFR) from the IP address of the machine where you are running the axfr-get tool. Most DNS servers will have a configuration option to specify which IP addresses are allowed to perform zone transfers.
3. Check the usage of the axfr-get tool and ensure that you are using the correct syntax and options. The axfr-get tool requires the DNS server IP address, the domain name for the zone that you want to transfer, and the output file where the transfer results will be saved. For example:

axfr-get -d domain.com -s dns.server.ip -f domain.com.zone