update roles/modify-ipt-gateway/tasks/main.yml ..
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4702cbf332
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@ -100,96 +100,221 @@
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notify:
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- Restart IPv6 Firewall
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- name: addjust line 'adjust_kernel_parameters' (IPv6)
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lineinfile:
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path: /etc/ipt-firewall/main_ipv6.conf
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regexp: '^adjust_kernel_parameters='
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line: '#adjust6_kernel_parameters=true'
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when:
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- main_ipv6_exists.stat.exists
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notify:
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- Restart IPv6 Firewall
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- name: addjust line 'protect_against_several_attack' (IPv6)
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lineinfile:
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path: /etc/ipt-firewall/main_ipv6.conf
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regexp: '^protect_against_several_attacks='
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line: '#protect6_against_several_attacks=true'
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when:
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- main_ipv6_exists.stat.exists
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notify:
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- Restart IPv6 Firewall
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# ---
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# Allow local services from ALL extern netwoks
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# Block Routers
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# ---
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- name: Check if String 'allow_all_ext_traffic_to_local_service..' (IPv4) is present
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shell: grep -q -E "^allow_all_ext_traffic_to_local_service=" /etc/ipt-firewall/main_ipv4.conf
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register: allow_all_ext_traffic_to_local_service_ipv4_present
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- name: Check if String 'drop_syn_flood..' (IPv4) is present
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shell: grep -q -E "^#?drop_syn_flood=" /etc/ipt-firewall/main_ipv4.conf
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register: drop_syn_flood_ipv4_present
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when: main_ipv4_exists.stat.exists
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failed_when: "allow_all_ext_traffic_to_local_service_ipv4_present.rc > 1"
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changed_when: "allow_all_ext_traffic_to_local_service_ipv4_present.rc > 0"
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failed_when: "drop_syn_flood_ipv4_present.rc > 1"
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changed_when: "drop_syn_flood_ipv4_present.rc > 0"
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- name: Adjust file '/etc/ipt-firewall/main_ipv4.conf' (allow_all_ext_traffic_to_local_service)
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- name: Adjust file '/etc/ipt-firewall/main_ipv4.conf' (drop_syn_flood)
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blockinfile:
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path: /etc/ipt-firewall/main_ipv4.conf
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insertafter: '^#?\s*any_access_from_inet_networks'
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insertafter: '^#?\s*protect_against_several_attacks=true'
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block: |
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# =============
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# - Allow local services from ALL extern netwoks
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# =============
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# Protection against syn-flooding
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#
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#drop_syn_flood=false
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# - allow_all_ext_traffic_to_local_service
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# - I have to say that fragments scare me more than anything.
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# - Sending lots of non-first fragments was what allowed Jolt2 to effectively "drown"
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# - Firewall-1. Fragments can be overlapped, and the subsequent interpretation of such
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# - fragments is very OS-dependent (see this paper for details).
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# - I am not going to trust any fragments.
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# - Log fragments just to see if we get any, and deny them too
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# -
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# - allow_all_ext_traffic_to_local_service="local-address:port:protocol [local-address:port:protocol] .."
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# - !! 'drop_fragments' does not work within telekom mobile connections !!
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# -
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# - Note:
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# - =====
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# - - Only 'tcp' and 'udp' are allowed valuse for protocol.
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# -
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# - Example:
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# - allow extern traffic to service at 83.223.73.210 on port 1036
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# - allow extern traffic to https service at 83.223.73.204
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# -
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# - allow_ext_net_to_local_service="
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# - 83.223.73.210:1036:tcp
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# - 83.223.73.204:$standard_https_port:tcp
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# - "
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# -
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# - Blank separated list
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# -
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allow_all_ext_traffic_to_local_service=""
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marker: "# Marker set by modify-ipt-gateway.yml (allow_all_ext_traffic_to_local_service)"
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#drop_fragments=true
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# drop new packages without syn flag
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#
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#drop_new_not_sync=true
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# drop invalid packages
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#
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#drop_invalid_state=true
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# drop packages with unusal flags
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#
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#drop_invalid_flags=true
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# Refuse private addresses on extern interfaces
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#
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# Refuse packets claiming to be from a
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# Class A private network
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# Class B private network
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# Class C private network
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# loopback interface
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# Class D multicast address
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# Class E reserved IP address
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# broadcast address
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#drop_spoofed=true
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# Don't allow spoofing from that server
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#
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#drop_spoofed_out=true
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# Refusing packets claiming to be to the loopback interface protects against
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# source quench, whereby a machine can be told to slow itself down by an icmp source
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# quench to the loopback.
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#drop_ext_to_lo=true
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marker: "# Marker set by modify-ipt-gateway.yml (drop_syn_flood)"
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when:
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- main_ipv4_exists.stat.exists
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- allow_all_ext_traffic_to_local_service_ipv4_present is changed
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- drop_syn_flood_ipv4_present is changed
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- name: Check if String 'allow_all_ext_traffic_to_local_service..' (IPv6) is present
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shell: grep -q -E "^allow_all_ext_traffic_to_local_service=" /etc/ipt-firewall/main_ipv6.conf
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register: allow_all_ext_traffic_to_local_service_ipv6_present
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- name: Check if String 'drop6_syn_flood..' (IPv6) is present
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shell: grep -q -E "^#?drop6_syn_flood=" /etc/ipt-firewall/main_ipv6.conf
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register: drop6_syn_flood_ipv6_present
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when: main_ipv6_exists.stat.exists
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failed_when: "allow_all_ext_traffic_to_local_service_ipv6_present.rc > 1"
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changed_when: "allow_all_ext_traffic_to_local_service_ipv6_present.rc > 0"
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failed_when: "drop6_syn_flood_ipv6_present.rc > 1"
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changed_when: "drop6_syn_flood_ipv6_present.rc > 0"
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- name: Adjust file '/etc/ipt-firewall/main_ipv6.conf' (allow_all_ext_traffic_to_local_service)
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- name: Adjust file '/etc/ipt-firewall/main_ipv6.conf' (drop6_syn_flood)
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blockinfile:
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path: /etc/ipt-firewall/main_ipv6.conf
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insertafter: '^#?\s*any_access_from_inet_networks'
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insertafter: '^#?\s*protect6_against_several_attacks=true'
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block: |
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# Protection against syn-flooding
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#
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#drop6_syn_flood=false
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# drop new packages without syn flag
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#
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#drop6_new_not_sync=true
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# drop invalid packages
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#
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#drop6_invalid_state=true
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# drop packages with unusal flags
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#
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#drop6_invalid_flags=true
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# Refuse spoofed packets pretending to be from your IP address.
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#
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#drop6_from_own_ip=true
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# Refuse private addresses on extern interfaces
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#
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#drop6_spoofed=true
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marker: "# Marker set by modify-ipt-gateway.yml (drop6_syn_flood)"
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when:
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- main_ipv6_exists.stat.exists
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- drop6_syn_flood_ipv6_present is changed
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# ---
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# Block UDP/TCP Ports out
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# ---
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- name: Check if String 'block_udp_extern_out_ports..' (IPv4) is present
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shell: grep -q -E "^block_udp_extern_out_ports=" /etc/ipt-firewall/main_ipv4.conf
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register: block_udp_extern_out_ports_ipv4_present
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when: main_ipv4_exists.stat.exists
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failed_when: "block_udp_extern_out_ports_ipv4_present.rc > 1"
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changed_when: "block_udp_extern_out_ports_ipv4_present.rc > 0"
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- name: Adjust file '/etc/ipt-firewall/main_ipv4.conf' (block_udp_extern_out_ports)
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blockinfile:
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path: /etc/ipt-firewall/main_ipv4.conf
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insertafter: '^#?\s*block_upnp_traffic_out'
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block: |
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# =============
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# - Allow local services from ALL extern netwoks
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# --- Block UDP Ports out
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# =============
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# - allow_all_ext_traffic_to_local_service
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# - UDP Ports to block (only extern out)
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# -
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# - allow_all_ext_traffic_to_local_service="local-address,port,protocol [local-address,port,protocol] .."
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# - Comma separated list of udp ports
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# -
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# - Note:
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# - =====
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# - - Only 'tcp' and 'udp' are allowed valuse for protocol.
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block_udp_extern_out_ports=""
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# =============
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# --- Block TCP Ports out
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# =============
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# - TCP Ports to block (only extern out)
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# -
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# - Example:
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# - allow extern traffic to service at 2a01:30:1fff:fd00::210 on port 1036
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# - allow extern traffic to https service at 2a01:30:1fff:fd00::204
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# - Comma separated list of tcp ports
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# -
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# - allow_ext_net_to_local_service="
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# - 2a01:30:1fff:fd00::210,1036,tcp
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# - 2a01:30:1fff:fd00::204,$standard_https_port,tcp
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# - "
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block_tcp_extern_out_ports="${standard_turn_service_ports}"
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marker: "# Marker set by modify-ipt-gateway.yml (block_udp_extern_out_ports)"
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when:
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- main_ipv4_exists.stat.exists
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- block_udp_extern_out_ports_ipv4_present is changed
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- name: Check if String 'block_udp_extern_out_ports..' (IPv6) is present
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shell: grep -q -E "^block_udp_extern_out_ports=" /etc/ipt-firewall/main_ipv6.conf
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register: block_udp_extern_out_ports_ipv6_present
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when: main_ipv6_exists.stat.exists
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failed_when: "block_udp_extern_out_ports_ipv6_present.rc > 1"
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changed_when: "block_udp_extern_out_ports_ipv6_present.rc > 0"
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- name: Adjust file '/etc/ipt-firewall/main_ipv6.conf' (block_udp_extern_out_ports)
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blockinfile:
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path: /etc/ipt-firewall/main_ipv6.conf
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insertafter: '^#?\s*block_upnp_traffic_out'
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block: |
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# =============
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# --- Block UDP Ports out
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# =============
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# - UDP Ports to block (only extern out)
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# -
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# - Blank separated list
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# - Comma separated list of udp ports
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# -
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allow_all_ext_traffic_to_local_service=""
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marker: "# Marker set by modify-ipt-gateway.yml (allow_all_ext_traffic_to_local_service)"
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block_udp_extern_out_ports=""
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# =============
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# --- Block TCP Ports out
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# =============
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# - TCP Ports to block (only extern out)
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# -
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# - Comma separated list of tcp ports
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# -
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block_tcp_extern_out_ports=""
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marker: "# Marker set by modify-ipt-gateway.yml (block_udp_extern_out_ports)"
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when:
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- main_ipv6_exists.stat.exists
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- allow_all_ext_traffic_to_local_service_ipv6_present is changed
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- block_udp_extern_out_ports_ipv6_present is changed
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# ---
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