I try to ping outside internet from Mikrotik terminal but I can't. I tried to ping gmail.com IP as

gmail.com IP is: 74.125.236.53

> ping 74.125.236.53

output:

timout

But If I ping my local system I can able to do as

> ping xxx.xxx.xxx.206

output:

connected

Why can not I able to ping outside my LAN connection?

your ISP may be blocking ICMP

your ISP may be blocking ICMP

I have contact my Internet Service provider about this issue, they told me this is problem with mikrotik router and they don't have enough experience with Mikrotik router, they couldn't help me.

Check your filter rules and if you have a default gateway for the router

Check your filter rules and if you have a default gateway for the router

I don't have any filter and NAT rules. What else I need to check?

Maybe is not having a NAT rule the issue.
Hoe are you connected to the internet and how is your IP setup?

Maybe is not having a NAT rule the issue.
Hoe are you connected to the internet and how is your IP setup?

ether1-Input:
Address = 10.0.0.2/30 Network= 10.0.0.0

ether2-LAN:
Address = 121.222.121.193/28 Network = 121.222.121.192

IPs specified are not correct. I pick some random number.

What routes do you have?

I don't have any filter and NAT rules.

If you do not have any NAT rules, you won't go far from home. You should probably have at least this: If ether1 is not your WAN interface, change that.