[Bug 215256] Problem with natd + carp

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215256

            Bug ID: 215256
           Summary: Problem with natd + carp
           Product: Base System
           Version: 11.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: dipdill at hotmail.com
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

I'm not really sure where this bug fits as it is a problem with natd/carp.

I have 2 router systems that I just upgraded from 10.3 to 11.0.  Both just
basic installs running natd and carp.

When I have the 2 systems up and running one is master and the other is in
backup status.  The natd on the backup system is still somehow impacting
traffic.  If I go into the backup system and do a /etc/rc.d/natd stop...
traffic starts to flow thru the master system again.

All of my other systems point to the carp vip 192.168.32.1 as their default
gateway.  The natd is configured on the carp vip of 10.140.241.5.

Here is my configs.  If there is anything else that you need to help
troubleshoot this... please let me know.

Thanks

Don

Master rc.conf:

ifconfig_em1="inet 192.168.32.111 netmask 255.255.248.0"
ifconfig_em1_alias0="inet vhid 111 pass ch at ng3m3 alias 192.168.32.1/21"
ifconfig_em2="inet 10.140.241.3 netmask 255.255.255.240"
ifconfig_em2_alias0="inet vhid 120 pass ch at ng3m3 alias 10.140.241.5/28"

defaultrouter="10.140.241.2"

gateway_enable="YES"
firewall_enable="YES"
firewall_logging="YES"
firewall_type="open"
firewall_script="/etc/ipfw.rules"

natd_enable="YES"
natd_interface="10.140.241.5"
natd_flags="-f /etc/natd.conf"

Master natd.conf:

port 8668
alias_address 10.140.241.5

log_denied yes
deny_incoming no
use_sockets yes
same_ports no
log_ipfw_denied yes

Backup rc.conf:

ifconfig_em1="inet 192.168.32.112 netmask 255.255.248.0"
ifconfig_em1_alias0="inet vhid 111 advskew 50 pass ch at ng3m3 alias
192.168.32.1/21"
ifconfig_em2="inet 10.140.241.4 netmask 255.255.255.240"
ifconfig_em2_alias0="inet vhid 120 advskew 50 pass ch at ng3m3 alias
10.140.241.5/28"

defaultrouter="10.140.241.2"

gateway_enable="YES"
firewall_enable="YES"
firewall_logging="YES"
firewall_type="open"
firewall_script="/etc/ipfw.rules"

natd_enable="YES"
natd_interface="10.140.241.5"
natd_flags="-f /etc/natd.conf"

Backup natd.conf:

port 8668
alias_address 10.140.241.5

log_denied yes
deny_incoming no
use_sockets yes
same_ports no
log_ipfw_denied yes

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