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

Index

[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z]

UDP (User Datagram Protocol) 2nd

     denial-of-service attacks

    DHCP servers

         accessing 2nd 3rd 4th

         message types 2nd

     firewall log messages 2nd

     flooding on incoming packets

     local client traffic over 2nd

     protecting on unprivileged ports 2nd

     query lookup requests

     remote network time servers, accessing 2nd

     rule organization

     service protocol tables 2nd

     traceroute 2nd 3rd

udp filter table match operations

ULOG target extensions 2nd

unclean filter table match extensions 2nd

unicast addresses (IP)

UNIX sockets

unprivileged ports 2nd 3rd

     local TCP services 2nd 3rd

     local UDP services 2nd

updates 2nd 3rd 4th

URG flag

Usenet news services

     news servers, hosting 2nd

     NNTP 2nd

         choke NNTP client DMZ configurations

         gateway NNTP conduit and server DMZ configurations

     peer news feeds

     reading and posting news

user accounts, intrusion detection

User Datagram Protocol [See UDP]

user-defined chains

     branching

     characteristics of

     example 2nd

         connection-tracking 2nd 3rd

         destination-address-check 2nd

         EXT-icmp-in

         EXT-icmp-out

         EXT-input 2nd 3rd 4th 5th 6th 7th 8th 9th

         EXT-log-in

         EXT-log-out

         EXT-output 2nd 3rd 4th 5th 6th 7th 8th 9th

         firewall initialization 2nd 3rd

         installing chains 2nd 3rd 4th

         local_dhcp_client_query

         local_dhcp_client_request 2nd

         local_dns_client_request

         local_dns_server_query

         local_tcp_server_response

         local_udp_client_request

         log-tcp-state

         logging dropped packets 2nd 3rd

         remote_dhcp_server_response 2nd 3rd

         remote_dns_server_response

         remote_tcp_client_request

         remote_udp_server_response

         source-address-check 2nd 3rd

         tcp-state-flags 2nd 3rd