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Added iptables rules to make sure BGP don't ack back to BGP peer syn messages #1561

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merged 2 commits into from
Apr 13, 2020
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Added iptables rules to make sure BGP don't ack back to BGP peer syn messages #1561

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Added iptables rules to make sure BGP don't
abdosi Apr 13, 2020
d7e572c
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abdosi Apr 13, 2020
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30 changes: 20 additions & 10 deletions ansible/roles/test/tasks/qos_sai.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -37,14 +37,18 @@
- lldpd
- lldp-syncd

- name: Disable bgpd
- name: Ensure BGP Daemon stopped
become: yes
lineinfile: dest=/etc/quagga/daemons
regexp=^bgpd=.*$
line='bgpd=no'
notify:
- Restart Quagga Daemon
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supervisorctl: state=stopped name=bgpd
delegate_to: "{{ ansible_host }}_bgp"

- name: Add iptables rule to drop BGP SYN Packet from peer so that we do not ACK back
shell: "iptables -A INPUT -j DROP -p tcp --destination-port bgp"
become: true

- name: Add ip6tables rule to drop BGP SYN Packet from peer so that we do not ACK back
shell: "ip6tables -A INPUT -j DROP -p tcp --destination-port bgp"
become: true

- meta: flush_handlers

Expand Down Expand Up @@ -467,14 +471,20 @@
- lldpd
- lldp-syncd

- name: Remove iptables rule to drop BGP SYN Packet from Peer
shell: "iptables -D INPUT -j DROP -p tcp --destination-port bgp"
become: true

- name: Remove ip6tables rule to drop BGP SYN Packet from Peer
shell: "ip6tables -D INPUT -j DROP -p tcp --destination-port bgp"
become: true

- name: Enable bgpd
become: yes
lineinfile: dest=/etc/quagga/daemons
regexp=^bgpd=.*$
line='bgpd=yes'
supervisorctl: state=started name=bgpd
delegate_to: "{{ ansible_host }}_bgp"
notify:
- Restart Quagga Daemon
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delegate_to: "{{ ansible_host }}_bgp"

- name: Restore original watermark polling status
shell: counterpoll watermark {{watermark_status.stdout}}
Expand Down