Method 1: Query using ldd
[example]
#ldd `which vsftpd` |
Grep libwrap
As long as the result shows libwrap.so.0, the service supports tcpwrapper
Method 2: Query using strings
[example]
#strings `which portmap` |
Grep hosts
There are:
/etc/hosts.allow
/etc/hosts.deny
This means that the service supports tcpwrapper.
When we detect whether a service supports tcpwrapper, as long as any of the above two methods are satisfied, it means that the service supports tcpwrapper.
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