查询域名是否坐反向解析

nslookup <IP地址>

nslookup 8.8.8.8

Server:  UnKnown
Address:  192.168.1.1

Non-authoritative answer:
Name:    dns.google
Address:  8.8.8.8

dig -x <IP地址>

dig -x 8.8.8.8

; <<>> DiG 9.16.15 <<>> -x 8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54321
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;8.8.8.8.in-addr.arpa.    IN  PTR

;; ANSWER SECTION:
8.8.8.8.in-addr.arpa. 300 IN  PTR dns.google.

import dns.resolver

def reverse_dns_lookup(ip_address):
    try:
        result = dns.resolver.resolve(ip_address, 'PTR')
        return result[0].to_text()
    except dns.resolver.NXDOMAIN:
        return f"No reverse DNS entry found for {ip_address}"
    except dns.resolver.NoAnswer:
        return f"No answer from DNS server for {ip_address}"
    except dns.resolver.Timeout:
        return f"Timeout while querying DNS server for {ip_address}"

# 示例使用
ip_address = "8.8.8.8"
print(reverse_dns_lookup(ip_address))