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    s23
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    my ipfw-ruleset

    #--- begin ipfw.rules ---#
    
    
    # Erlaube Loopback
    add 1000 allow ip from any to any via lo0
    
    # Erlaube Pakete von bestehenden Verbindungen
    add 1010 allow tcp from any to any established
    add 1020 allow all from any to any frag
    
    # Erlaube notwendigen ICMP Traffic (etwa Ping)
    add 1030 allow icmp from any to any icmptype 0,3,4,11,12
    
    # Erlaube Network Time (NTP)
    add 2010 allow udp from any 123 to any 123 
    
    # Erlaube FTP
    #add 2020 allow tcp from any to any 21 in setup
    #add 2021 allow tcp from any 20 to any 1024-65535 in setup
    
    # passive mode FTP erlauben - nicht empfohlen - wird ins log geschrieben
    # um Missbrauch nachvollziehen zu koennen
    # add 2022 allow log tcp from any 1024-65535 to any 1024-65535 in setup
    
    # Erlaube SSH
    add 2030 allow tcp from any to any 22 in setup
    
    # Erlaube Telnet
    # add 2040 allow tcp from any to any 23 in setup
    
    # Erlaube DNS
    add 2050 allow udp from any to any 53 out
    add 2051 allow udp from any 53 to any in
    
    # Erlaube Titeluebertragung Shoutcast mp3 Streaming (iTunes)
    # add 2090 allow udp from any 8000 to any in
    
    # Erlaube Websharing
    # add 3005 allow tcp from any to any 80 in setup
    
    # Resette Verbindungen auf den Authentication Service 
    #und schreibe sie ins log.
    # Auf einen Reset antwortet ein Server schneller als auf einen Deny
    add 5010 reset log tcp from any to any 113 in
    
    # Verbiete alle uebrigen eingehenden Pakete und schreibe sie ins log
    add 5020 deny log all from any to any in
    
    #andere ausgehende verbindugn zulassen
    add 5040 allow ip from any to any out setup
    
    
    
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