Hi!
I have a mikrotik with 2 WAN Links. Link 1 is ISP with PPOE and Link 2 is Starlink (works with DHCP Client). Inside mikrotik i have normal internet access, but the devices connected in bridge can't navigate internet, i believe it's a DNS problem. The computers get correct IP from Mikrotik (DHCP Server).

I try 2 different ways:
1 -> In PPOE and dhcp client connection i unchecked the option "User Peer DNS", and put many DNS in "IP->DNS" section (Google, CloudFare, OpenDNS). Computers remained without internet access.
2-> I remove all DNS servers in "IP->DNS" and checked the "User Peer DNS" in PPOE and DHCP Client.

I have a "Masquerade Scrnat" rule in firewall to WAN interfaces.

What i'm doing wrong? Any ideas?

Without seeing the config NOpe.
/export file=anynameyouwish (minus router serial number, public wanip information, keys etc.)

I attached my .rsc file.

Dont understand the purpose of vlan20 ? Starlink doesnt use vlans??

Dont understand the purpose of vlan20 ? Starlink doesnt use vlans??

The use of the vlan has no relation to starlink. A few devices need to have another IP range (described there in IP -> Address), so that third parties can read data from these devices through VPN.
I tried disabling this vlan to see if it is related to the DNS problem, but the problem persisted.

Well its confusing because you have it tied to the bridge but you dont have /interface bridge vlan settings NOR is is bridge vlan filtering enabled.......

Personally I would delete everything that is non standard and simply have a config that has a simple LAN and your two ISP WANs and troubleshoot the config.
Once its working bring back all the raw rule and other crap polluting the config, vlan20 etc...............

I found something.

If i change "masquerade srcnat" rule, keeping the option "out-interface-list" empty, the internet works.
if a put "out-interface-list" with WAN, which is a list with two link input ports, the internet stops.

What i'm doing wrong?

I have been fighting a starlink DNS issue. I know this sounds strange and I am hoping someone will point out why it is behaving this way.

I don't know what hardware you have but on the interface facing the starlink can you go in and try turning off "Auto Negotiation" and just setting it to "1G baseT full". I was having all sorts of DNS issues but things like ping worked fine. I thought it might have to do with MTU but that didn't seem to make any difference when I adjusted it.

I had my starlink plugged into a RB2011-UAS-2Hnd-IN in bridge mode with no problems but as soon as I plugged everything into my CRS310-8G+2S+ I could not get any DNS resolution from the switch itself or get it pass any DNS traffic to a client on the switch. Setting the internet to negotiate to 100 full or turning off auto negotiation seems to fix it. I do not know why.

@lostgone --> Start your own thread please.

@felipe Post your latest config

@lostgone --> Start your own thread please.

@felipe Post your latest config

Start my own thread for what? I am not having any problems. I was posting what fixed my problem.

have been fighting a starlink DNS issue. I know this sounds strange and I am hoping someone will point out why it is behaving this way.

Sounds like your asking for help to me......but okay, maybe your not.
What a switch has to do with router issues is a bit strange to interject and you have no clarity in which device this adjustment was made.