List of Linux security tools

Sxid
Check the suid, sgid, and files without the master in the system.
Skey
One-time password Tool
Logrotate
Log loop Tool
Logcheck
Log Management Tools
Swatch
Log management tools, more real-time than logcheck
Ssh (openssh)
Secure Connection Authentication
Openssl
Encrypted data transmission and authentication
Portsentry
Anti-scan tool to monitor udp and tcp ports
Tripwire
Provides system integrity check
Gnupg
Encrypt a single file and create a digital signature
Hostsentry
Host-Based Intrusion Detection, logs connections
Ipchains
Package filtering Firewall provided by Linux release
CFS and TCFS
The password file system and the transparent password file system implement encryption of all files in the directory, based on NFS
Anti-sniff
Anti-sniffing tool to check whether there is a sniffer in the Network
Freeswan
VPN tool in linux
Syslog-ng
Replacing the syslog Log File System
Scandns
Tools for dns check and tracking
Whisker
Cgi Scanner
Snoopy
Trace execve system call records to execute commands
Linux kernel patch
Kernel security patch to prevent Buffer Overflow
Krnsniff
A kernel-based listener Module
Iptable
Used to replace the ipchains packet filtering Firewall
Imsafe
Detects buffer overflow and other problems by tracking system calls
Iplog
Logs of incoming and outgoing packets
Solaris designer
Kernel Patch to prevent Buffer Overflow
Stackguard
Patch gcc to prevent Buffer Overflow
DTK Honey
Port AttacK Defense
Antiroute
Block and Record Route-based Tracing

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