HI,

I just bought a RB450G, remove the default configuration (bridges)
and put the ip public address in eth1, then connect it to a switch where my ISP radio were plugged.
however, i could not ping that ip public address from any external network.
i do not setup any firewall rule.
I use RouterOS 4.16

please kindly advise.

thanks a lot for your reply

if you need me to post any setup in the router, please advise. I have no where else to ask for...

You should post "/ip address", "/ip route" and "/ip firewall filter".

Hi SurferTim,

as requested

[admin@MikroTik] > /ip route pr
Flags: X - disabled, A - active, D - dynamic,
C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme,
B - blackhole, U - unreachable, P - prohibit
# DST-ADDRESS PREF-SRC GATEWAY DISTANCE
0 ADC 111.XX.YY.ZZZ/30 111.XX.YY.ZZZ ether1 0

[admin@MikroTik] > /ip firewall filter pr
Flags: X - disabled, I - invalid, D - dynamic

[admin@MikroTik] > /ip address pr
Flags: X - disabled, I - invalid, D - dynamic
# ADDRESS NETWORK BROADCAST INTERFACE
0 111.XX.YY.ZZZ/30 111.XX.YY.ZZZ 111.XX.YY.ZZZ ether1

I do not see a default gateway in "/ip route". There should be an entry like this: The xx.xx.xx.xx should be the gateway issued by your ISP.

so you mean to say, if i add the ip default route
then any external network will be able to ping that public address?

i have contact my isp, they said they only able to ping that ip from the gateway's ip address.

i will add the default route, and let you know the result.

Without a default route, you can only access (and respond to) your localnets. All should work fine with a default route.

Thanks SurferTim, it work like a charm!
i cant believe a simple default route is mandatory.

You're welcome! And a default route is mandatory only if you want internet access. Localnet access does not require one. But I guess you know that now.