1 DNS IntroductionDNS (domain Name System) can provide valuable data during the detection process, the basic function of DNS is to convert the domain name to an IP address. (If you don't know much about DNS, it's going to take a lot of effort!) Now
Common Linux commands: nslookup, lsmd5sum, uname, and history1. nslookup
DNS developers all know what the nslookup (name server lookup: domain name query) command is for. It comes with windows. However, in Linux, enter nslookup to display the
1. install the software packages dig and nslookup. Centos: # yuminstallbind-utilsDebian: # apt-getupdate # apt-getinstalldnsutils set the dns server IP address in/etc/resolv. conf before querying. II. usage
1. install the software packageInstall
After DNS compilation is complete, the system prompts "XNDOMAIN -- Linux Enterprise Application-Linux server application" during nslookup. The following is a detailed description. Attaches all the compilation content, and red indicates the modified
Some commands for configuring the DNS server and nslookup in Linux-Linux Enterprise Application-Linux server application information. The following is a detailed description. There are two email servers: 192.168.1.1 (B .test.cn in windows) and 192.16
Http://www.computerhope.com/unix/unslooku.htmAbout NslookupThe nslookup command is used to query Internet name servers interactively for information.Overviewnslookup, which stands for "name Server Lookup", was a useful tool for finding out
tcpdump Grab Bag:
want to output dot decimal: tcpdump-n * * *Want to output MAC address: TCPDUMP-E * * *Catch target a package: tcpdump DST A//requires root permission, or sudo.
The contents of the network package, including the source IP address,
Usually collect some commands for easy use.1:LS-LRT Sort by Time show2:nslookup View DNS resolution3:lsof-p Process NumberLsof ' which httpd '//That process is using Apache executable fileLSOF/ETC/PASSWD//The process is taking
Passive Information collectionFeatures:Based on open channelNo direct contact with the targetAvoid leaving all traces.Standard Reference--osint:U.S. militaryNorth Atlantic Treaty Organization noun explanationdns--domain Name System domain Name
Netstat Command Overview:Netstat is a very useful tool for monitoring TCP/IP networks, which can display routing tables, actual TCP network connections, TCP and UDP snooping, process memory management, and status information for each network
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