Public bug reported:

Firewall rule in ip6table is incorrect, the ports need to be swapped

The file delivered - /usr/share/ufw/iptables/before6.rules
which is then copied to - /etc/ufw/before6.rules  

Delivered by Package:

# allow dhcp client to work
-A ufw6-before-input -p udp -s fe80::/10 --sport 547 -d fe80::/10 --dport 546 
-j ACCEPT

The ports for 
--sport and --dport are swapped

Should be:

-A ufw6-before-input -p udp -s fe80::/10 --sport 546 -d fe80::/10
--dport 547 -j ACCEPT

Package version found in:
  0.36-0ubuntu0.1

** Affects: ufw (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1882314

Title:
  Firewall rule in before6.rules for dhcp6 is wrong

Status in ufw package in Ubuntu:
  New

Bug description:
  Firewall rule in ip6table is incorrect, the ports need to be swapped

  The file delivered - /usr/share/ufw/iptables/before6.rules
  which is then copied to - /etc/ufw/before6.rules  

  Delivered by Package:

  # allow dhcp client to work
  -A ufw6-before-input -p udp -s fe80::/10 --sport 547 -d fe80::/10 --dport 546 
-j ACCEPT

  The ports for 
  --sport and --dport are swapped

  Should be:

  -A ufw6-before-input -p udp -s fe80::/10 --sport 546 -d fe80::/10
  --dport 547 -j ACCEPT

  Package version found in:
    0.36-0ubuntu0.1

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ufw/+bug/1882314/+subscriptions

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