So, I've set up a new router, enabled ssh and set up PPTP, but am unable to access any the router remotely.

I have one other older router that works perfectly and looking at it the only main difference I see is that although it is also set up as a Router, there is a Bridge interface on it. Out of curiosity I added a Bridge interface to my newer router to see if that would make it work, but it actually ended up blocking all traffic, so I removed it.

To be honest, I just don't see what having a Bridge interface should matter. I can ssh to the device within the LAN, just on the external interface. What am I doing wrong?

Thanks!

Have you opened the 22 port in the firewall for all interfaces?
For PPTP:
These rules open these ports on all interfaces, use with caution if secutity is a sensible issue, use them to test and then if it works add more parameters to rules for security like: "src-address-list=" or "in-interface="

Well, let's put it this was for ssh, it is listed in the Filter as:

0 ;;; SSH for secure shell
chain=input action=accept protocol=tcp dst-port=222 log=no
log-prefix=""

So wouldn't that be the same?
BTW, note that the 0 means it's in position ZERO.

Just wanted to verify, on your last post you said the filter rule was setup for port 222, is that a typo or is your rule setup for port 222?

Make sure the ssh IP service is enabled.

222 was on purpose to help in preventing hacks on port 22.

Do an export so we can see your settings.

So here are the results of the commands you asked me to provide. A few things I have removed for privacy reasons:

/ip service export
/ip service
set telnet disabled=yes
set ftp disabled=yes
set ssh port=222
set api disabled=yes

/ip firewall filter export
/ip firewall filter
add chain=input protocol=tcp src-port=222
add chain=input comment="default configuration" protocol=icmp
add chain=input comment="allow winbox" dst-port=8291 protocol=tcp
add chain=input comment="allow api" dst-port=8728 protocol=tcp
add chain=input comment="default configuration" connection-state=established
add chain=input comment="default configuration" connection-state=related
add action=drop chain=input comment="default configuration" in-interface=ether1-gateway
add chain=forward comment="default configuration" connection-state=established
add chain=forward comment="default configuration" connection-state=related
add action=drop chain=forward comment="default configuration" connection-state=invalid
add chain=input comment="acccept lan" in-interface=!ether1-gateway src-address=192.168.1.0/24
add action=drop chain=input comment="drop everything else"

/interface export
/interface bridge
add auto-mac=no name=Bridge
/interface ethernet
set [ find default-name=ether1 ] name=ether1-gateway
set [ find default-name=ether2 ] name=ether2-master-local
set [ find default-name=ether3 ] disabled=yes master-port=ether2-master-local name=ether3-slave-local
set [ find default-name=ether4 ] disabled=yes master-port=ether2-master-local name=ether4-slave-local
set [ find default-name=ether5 ] disabled=yes master-port=ether2-master-local name=ether5-slave-local
/interface pptp-server
add name=pptp-in1 user=********

/interface bridge export
/interface bridge
add auto-mac=no name=Bridge

Ok, figured it out.
I just needed to change src-port to dst-port and everything worked!