Linux Network Security Information Collection

1. Learn how to collect information about a network target:

Ping www.baidu.com
Nmap sp 192.168.0.1-255
Telnet www.baidu.com 3306
Whois www.baidu.com

2. Understand the topology of a specific network

3. Learn about how to prevent DNS region transfer:

Zone Transfer is the process of copying regional database files between multiple DNS servers. It is mainly completed through the copy process.
Nslookup:
C: Documents and SettingsAdministrator> nslookup
Default Server: ns.lnpta.net.cn // Default NS
Address: 202.96.64.68 // IP
========================================================== ==========
> Set type = soa authority
========================================================== ==========
> Goplayplay.com
Server: ns.lnpta.net.cn
Address: 202.96.64.68

Non-authoritative answer:
Goplayplay.com
Primary name server = feed19.nameservers.net // DNS
Responsible mail addr = hostmaster.rapidsite.net
Serial = 2010071223
Refresh = 7200 (2 hours)
Retry = 3600 (1 hour)
Expire = 604800 (7 days)
Default TTL = 86400 (1 day)

Goplayplay.com nameserver = ns19a.nameservers.net
Goplayplay.com nameserver = ns19b.nameservers.net
Ns19a.nameservers.net internet address = 161.58.75.72
Ns19a.nameservers.net internet address = 161.58.134.98
Ns19b.nameservers.net internet address = 198.170.241.2
Ns19b.nameservers.net internet address = 161.58.134.114
====================================, Set your own DNS to the other party's ==================
> Server feed19.nameservers.net
Default Server: feed19.nameservers.net // The DNS has been set as the Peer
Address: 161.58.134.130 // IP
========================================================== ==========
> Ls-d goplayplay.com // The detailed information is displayed below, that is, the region is successfully transferred and all DNS records are displayed.