Linux Firewalls: Attack Detection and Response with iptables, psad, and fwsnort

Index

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echo services

echo-reply messages 2nd 3rd

echo-request messages 2nd 3rd 4th

email

     client/server email combinations

     DMZ 2nd 3rd

     IMAP 2nd 3rd 4th 5th 6th

     POP 2nd 3rd 4th 5th

     remote clients 2nd

     SMTP 2nd

         SMTP clients 2nd 3rd 4th

         SMTP servers 2nd 3rd 4th 5th

"Email Bombing and Spamming,"

enabling

     DNS 2nd 3rd 4th 5th 6th 7th

         choke DMZ configuration 2nd

         DMZ name server gateway configuration 2nd

         DNS lookups as clients 2nd

         DNS lookups as forwarding servers 2nd 3rd

         zone transfers

     Internet services 2nd 3rd 4th

     kernel-monitoring support 2nd

     loopback interfaces 2nd

     outgoing traceroute requests

encapsulating security payload (ESP)

     end-to-end transparencies

     ESP (encapsulating security payload)

     ESTABLISHED matches 2nd

     Ethernet addresses 2nd

     executable protections (GrSec)

    expressions (TCPDump)

         direction qualifiers 2nd

         primitives

         protocol qualifiers

         type qualifiers 2nd

EXT

EXT-icmp-in 2nd 3rd

EXT-icmp-out 2nd 3rd

EXT-input 2nd

     DNS traffic 2nd 3rd

     ICMP traffic 2nd

     local client traffic over TCP 2nd 3rd 4th

     local client traffic over UDP 2nd

     local server traffic over TCP 2nd

EXT-log-in chain

EXT-log-out chain

EXT-output 2nd

     DNS traffic 2nd

     ICMP traffic 2nd

     local client traffic over TCP 2nd 3rd 4th

     local client traffic over UDP 2nd

     local server traffic over TCP 2nd

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