I've had my RB450G for a number of years, and love it. I rarely have to touch it - in fact, I usually only touch it when I remember to do upgrades. Usually that has not been an issue - I go into webfig and tell it to upgrade, and I'm good to go after a reboot. So I haven't touched the configuration since I originally did it about 5 years ago. It's just worked! (Thanks!)
Unfortunately, last night was the exception - I did the package upgrades - which went from something a couple years out of date (6.24? - it was in the 6 series) to 6.43. It rebooted, and didn't seem to come back up - I pulled the power, restarted (b/c I couldn't find my USB Serial adapter) and it came up - at least my internal network was working fine. I could get between my systems; however, I couldn't get out to the Internet.
After some diagnostics I determined that I could hit the ISP's provided modem from my laptop behind the RB450G, but I couldn't get it to route beyond that.
I've got WLAN (port 1?) set up to go to the ISP's modem where it gets information via DHCP. This seems to be working correctly on the face of things - it gets an IP address (f.e 192.168.1.65) and default routes, etc of the modem address (192.168.1.254).
Ports 2-5 are configured as 192.168.2.17/192.168.2.18/192.168.2.191220.127.116.11. These are all added to bridge1 along with 192.168.3.16, used for other devices.
Beyond this I have a basic firewall configured - only related traffic allowed in, all traffic forwarded out - with NAT enabled so the ISP modem (hopefully) only sees 1 IP address for all the traffic on my network. Everything is presently only IPv4; I may start enabling IPv6...but not ready yet.
I've got an RPi which provides DHCP services plugged directly into Port 2, and the WAP plugged into Port 5. Behind the WAP (which also provides some wired ports) I have my laptop which correctly gets its DHCP address from the RPi, and further can hit the ISP modem's 192.168.1.254 address.
However - the RG450G no longer seems to be doing a default 0.0.0.0 route out to the ISP modem. I can neither access 18.104.22.168 (Google DNS) from my laptop, nor can I do so from within the terminal in the Webfig HTTP interface (ping 8.8.8.. I'm writing this through another laptop connected to the WAP on the ISP's modem. So the issue is certainly the RB450G not applying some route correctly but I can't figure out what is wrong.
So initially I just did a package upgrade which left me with Firmware 3.24 and Router OS 6.43 where I started running into this issue. I then upgraded the Firmware to 3.41 in case there was some conflict between Router OS and the Firmware, but the issue persists.
I'm open to redoing the configuration entirely - and would prefer to do something via Ansible if I did (getting ready to add a 24 port mikrotik switch and two mikrotik WAPs into the mix). Right now, I just want to get backup and running.
Any advice would be greatly appreciated.