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LutelWall (formerly known as Lutel Firewall) is high-level linux firewall configuration tool. It uses human-readable and easy to understand configuration to set up Netfilter in most secure way. Its flexibility allows firewall admins build from very simple, single-homed firewalls, to most complex ones - with multiple subnets, DMZ's and traffic redirections. It can be used on a dedicated firewall system, a multi-function gateway/router/server or on a standalone system. Configuration method of this firewall is designed to be as simple as possible without loosing Netfilter flexibility and its security features.
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| Traffic features: |
- flexible control over traffic using rule set
- user-defined protocols support
- support for any kind multiple external and internal interaces (and aliases)
- automated MASQUERADE / SNAT support
- easy to set up DNAT (transparent proxy, redirections to LAN/DMZ etc.)
- rate limit extensions
- packet marking for 3rd party shapers
- TOS (Type of Service) traffic optimizer
- both passive and active FTP support
- DHCP support
- can work as "workstation" firewall
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| Security features: |
- stateful TCP connection tracking with restrictive TCP chain
- blocking all stealth mode scans (FIN, Xmas Tree, Null, Windows scan or ACK scan modes (nmap -sF -sX -sN -sW -sA)
- blocking IP protocol scans (nmap -sO)
- blocking UDP scans (nmap -sU)
- blocking identification via TCP/IP fingerprinting (nmap -O)
- anti-spoof protection, including protection for aliases
- anti-smurf protection
- TCP SYN Flood protection
- UDP / ICMP Flood protection
- IANA reserved addresses checking
- SYSCTL parameters set for increased strength
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| Logging features: |
- logging stealth scans (FIN, Xmas Tree, Null), ACK scan modes (nmap -sF -sX -sN), IP protocol scans (nmap -sO), UDP scans (nmap -sU), nmap fingerprinting attempts.
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| Other features: |
- autodetect of connection type (static/dynamic, external/internal)
- auto update of firewall tool
- auto update IANA reserved list
- display firewall statistics in iptables native, csv or html format
- easy deployment on all distributions
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