dns rbl check

: QUOTE: If you want to determine whether an address 11.22.33.44 is blacklisted, software using the blacklist service will issue a DNS query to the blacklisted server (such as the cbl.anti-spam.org.cn), which is like this: check whether the record exists in 44.33.22.11.cbl.anti-spam.org.cn? If the address is blacklisted, the server returns an answer to the valid address. By convention, this address is 127

This article describes how to check whether the local DNS server works normally and how to update it. When we access a website, we directly enter the domain name in the browser, for example, www.webweb.com, when a website fails to be accessed normally, many users instinctively think that there is a problem with the local network or the target server. However, after some troubleshooting, however, it is not c

The other side, the flowers are not open * DNS Server Detection Method:This article focuses on the BIND server. The following experiment targets BIND9 service installed on Solaris10 (Version: 9.2.4 ).The BIND server can detect exceptions in two ways: query to identify exceptions or View CACHE records to identify exceptions.1) identify exceptions through queryThis function requires the BIND log audit function to be enabled. First, run the rndc command

controller to check, the original backup domain controller on the network cable and Nic interface is loose, that is, backup domain controller actually out of the entire network. After the network cable in the backup domain controller is plugged in, the network card on the primary domain controller is started and the system is properly entered, and the fault is eliminated. This failure appears to be due to the loosening of the network cable on the bac

Check whether the dns server change takes effect.First, let's take a look at the domain name resolution sequence priority:1. Local DNS Cache2. Local Hosts file3. DNS ServerView the local DNS Cache: ipconfig/displaydnsClear local DNS