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The most common example is the IP addresses (or prefix) of the nodes in a cluster using a remote replication feed with the gateway as the destination.

Troubleshooting tips

If you occasionally see the error SEC_ERROR_UNKNOWN_ISSUER , verify you don't have lingering old haproxy processes , and kill them manually.

To check if your selfsigned CA certificate is trusted run the following command:

trust list --filter=ca-anchors | grep Self -i -A2 -B4

Example Output you should see:
pkcs11:id=%f4%a2%f6%c6%e4%db%bc%c8%a1%23%83%d3%67%14%7c%51%c1%8d%bd%ba;type=cert
    type: certificate
    label: SelfSigned certificates
    trust: anchor
    category: authority

for CentOS7 and haproxy 1.8 by default require additional log settings to see the output in a file, add the following line in /etc/rsyslog.conf after the boot.log

local2.*    /var/log/haproxy.log

then run

systemctl restart rsyslog

you should now see haproxy logging in /var/log/haproxy.log

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