我在我的 VPS 中使用 BIND 9 设置 DNS，一切正常，但在 IntoDNS 中存在一些错误 30 分钟前我还添加了第二个名称服务器，但我收到错误这里是输出。
Reverse MX A records (PTR) ERROR: No reverse DNS (PTR) entries. The problem MX records are:
212.178.5.194.in-addr.arpa -> no reverse (PTR) detected
You should contact your ISP and ask him to add a PTR record for your ips
Stealth NS records sent Stealth NS records were sent:
ns2.mydomain.ir
Missing nameservers reported by parent FAIL: The following nameservers are listed at your nameservers as nameservers for your domain, but are not listed at the parent nameservers (see RFC2181 5.4.1). You need to make sure that these nameservers are working.If they are not working ok, you may have problems!
ns2.mydomain.ir
Multiple Nameservers ERROR: Looks like you have less than 2 nameservers. According to RFC2182 section 5 you must have at least 3 nameservers, and no more than 7. Having 2 nameservers is also ok by me.
编辑：如果需要真正的域，mydomain.ir 不是我的真正域告诉我。