For more details, there are several man pages you can read:
- invoke IPSEC utilities
- convert ASCII to Internet address, subnet, or range
- convert binary data bytes from and to ASCII formats
- convert binary data from and to ASCII formats
- convert IPSEC Security Association IDs to and from ASCII
- convert subnet/mask ASCII form to and from addresses
- convert unsigned-long numbers to and from ASCII
- control automatically-keyed IPSEC connections
- spew out collected IPSEC debugging information
- convert bit count to Internet subnet mask
- manipulate IPSEC extended routing tables
- is this Internet subnet mask a valid one?
- given Internet address and subnet mask, return host part
- set Klips -kernel IPSEC support, debug features and level
- show minimal debugging information
- take manually-keyed IPSEC connections up and down
- convert Internet subnet mask to bit count
- read additional command-line
options from file
- IPsec IKE keying daemon
- generate random bits in ASCII form
- convert Internet address range to ASCII
- generate RSA signature key
- control IPSEC subsystem
- manage IPSEC Security Associations
- group/ungroup IPSEC Security Associations
- given Internet address and subnet mask, return subnet number
- associate IPSEC virtual interface with real interface
- control interface for IPSEC keying daemon
- IPSEC configuration and connections
- secrets for IKE/IPsec authentication
- invoke IPSEC utilities
- convert Internet addresses to and from ASCII
- convert ASCII to Internet address, subnet, or range
- convert binary data bytes from and to ASCII formats
- convert binary data from and to ASCII formats
- convert IPSEC Security Association IDs to and from ASCII
- convert subnet/mask ASCII form to and from addresses
- convert unsigned-long numbers to and from ASCII
- control automatically-keyed IPSEC connections
- spew out collected IPSEC debugging information
- convert bit count to Internet subnet mask
- manipulate IPSEC extended routing tables
- is this Internet subnet mask a valid one?
- given Internet address and subnet mask, return host part
- set Klips (kernel IPSEC support) debug features and level
- show minimal debugging information
- take manually-keyed IPSEC connections up and down
- convert Internet subnet mask to bit count
- read additional command-line
options from file
- IPsec IKE keying daemon
- generate random bits in ASCII form
- convert Internet address range to ASCII
- generate RSA signature key
- control IPSEC subsystem
- manage IPSEC Security Associations
- group/ungroup IPSEC Security Associations
- given Internet address and subnet mask, return subnet number
- associate IPSEC virtual interface with real interface
- control interface for IPSEC keying daemon
- IPSEC configuration and connections
- secrets for IKE/IPsec authentication