Here are the current export from nat:
# nov/10/2017 06:29:34 by RouterOS 6.41rc52
# software id = R3IZ-BBCZ
#
# model = 2011UiAS
# serial number = 763107FDC325
/ip firewall nat
add action=masquerade chain=srcnat comment="defconf: masquerade" out-interface=\
pppoe-out1
add action=dst-nat chain=dstnat disabled=yes dst-port=443 log=yes protocol=tcp \
to-addresses=172.20.0.100 to-ports=443
currently i disabled the second rule.
here are the filter rules:
# nov/10/2017 06:31:16 by RouterOS 6.41rc52
# software id = R3IZ-BBCZ
#
# model = 2011UiAS
# serial number = 763107FDC325
/ip firewall filter
add action=accept chain=input comment="defconf: accept ICMP" protocol=icmp
add action=accept chain=input comment="defconf: accept established,related" \
connection-state=established,related
add action=accept chain=forward comment="defconf: accept established,related" \
connection-state=established,related
add action=drop chain=input comment="defconf: drop all from WAN" in-interface=\
pppoe-out1 protocol=tcp
add action=fasttrack-connection chain=forward comment="defconf: fasttrack" \
connection-state=established,related
add action=drop chain=forward comment="defconf: drop invalid" connection-state=\
invalid
add action=drop chain=forward comment=\
"defconf: drop all from WAN not DSTNATed" connection-nat-state=!dstnat \
connection-state=new in-interface=pppoe-out1
just for information the ipadress assigned on the pppoe connection is dynamical.
Just now i made a second try, it looks like the problem only exist's with port 443.