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[caclmgrd] Filter DHCP packets based on dest port only #4995

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Jul 17, 2020
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[caclmgrd] Filter DHCP packets based on dest port only #4995

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8 changes: 4 additions & 4 deletions files/image_config/caclmgrd/caclmgrd
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Original file line number Diff line number Diff line change
Expand Up @@ -245,12 +245,12 @@ class ControlPlaneAclManager(object):
iptables_cmds.append("ip6tables -A INPUT -p icmpv6 --icmpv6-type router-advertisement -j ACCEPT")

# Add iptables/ip6tables commands to allow all incoming IPv4 DHCP packets
iptables_cmds.append("iptables -A INPUT -p udp --dport 67:68 --sport 67:68 -j ACCEPT")
iptables_cmds.append("ip6tables -A INPUT -p udp --dport 67:68 --sport 67:68 -j ACCEPT")
iptables_cmds.append("iptables -A INPUT -p udp --dport 67:68 -j ACCEPT")
iptables_cmds.append("ip6tables -A INPUT -p udp --dport 67:68 -j ACCEPT")

# Add iptables/ip6tables commands to allow all incoming IPv6 DHCP packets
iptables_cmds.append("iptables -A INPUT -p udp --dport 546:547 --sport 546:547 -j ACCEPT")
iptables_cmds.append("ip6tables -A INPUT -p udp --dport 546:547 --sport 546:547 -j ACCEPT")
iptables_cmds.append("iptables -A INPUT -p udp --dport 546:547 -j ACCEPT")
iptables_cmds.append("ip6tables -A INPUT -p udp --dport 546:547 -j ACCEPT")

# Add iptables/ip6tables commands to allow all incoming BGP traffic
# TODO: Determine BGP ACLs based on configured device sessions, and remove this blanket acceptance
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