I got static IP lease line connectivity from an ISP. It gave me IP address, network IP, gateway IP and DNS IP. The ISP configured my router remotely. They created a bridge and assigned an IP 192.168.0.1/24. However when I change this bridge address to 192.168.2.1/24 or 10.0.0.1/24 or any internal IP address, the internet connection is lost. There are no other configuration that I know that has anything to do with binding the given lease IP and the internal IP address.
Does it mean that the ISP guy could have configured my router or on their end such that I cannot use any internal IP other than they have set?
Do ISP give out lease static IP with only specific internal address for use?
So if you attach a PC to their router what IP does it get??
When you go whats my IP on the PC, what does it show. ( change the numbers so its representative of the number but not exact ).
@anav, my PC gets IP in the network 192.168.0.1/24 such as 192.168.0.31, when i use whats my IP then I get the leased static external IP that ISP gave me which is say 50.50.50.98.
@rextended, there is no NAT configuration and the dhcp server was configured for a bridge(ether1,ether2 etc) with the network address 192.168.0.1/24, gateway 192.168.1.1.
I asked here because I have got no answer yet from the ISP and even after they give me I am not sure of the rules and how other ISP gave leased internet line.
@rextended, the ISP gave me the followiings:
external IP address:50.50.50.92/30
Network IP:50.50.50.93
Gateway IP:50.50.50.91
and secondary and primary DNS IPs.
Then they have setup a bridge1 with interfaces eth2 to eth10
The bridge1 IP is 192.168.0.1/24, network:192.168.0.0 and gateway 192.168.0.1. A dhcp server with bridge1 as interface has also been created.
So when I change the bridge1 IP address to something else there is not internet connection. I wanted to change the internal IP address(the bridge1 address) and looked into possible configuration that might somehow bind the internal IP to the external IP but cannot find. There is no NAT and firewall settings. So my question can the ISP prohibit me on changing bridge1 IP? how do ISP usually give out static IP? could there be configuration on my router which prohibits me changing the bridge1 IP? if so where should i look into?
You have specific issues particular to your ISP (I could be calling names here), which don’t have much with Mikrotik and ROS. You can’t realistically expect a cookbook recipe for solving your problem if none of forum members ever encountered similar issues. Can you? And calling names won’t attract potential helpers either.
I never understand the need to berate folks for asking a question… Anyway.
There are few steps to change the LAN’s subnet in RouterOS, and in the process you can lose access if you’re not familar with RouterOS. It’s not as plug-and-play as more simple home routers, so does require some knowledge of networking principles.
So just changing an IP address someplace isn’t enough to change the LAN subnet. The issue here is your ISP may have configured other things on the router – that’s the risk here.
But since you have the relevant WAN IPs, and willing to assuming they didn’t configure anything special… You can reset the Mikrotik config to default (e.g. reset button for 8 seconds while powering on). www.mikrotik.com should have the Quick Start guide on one of the tabs for the device. The “Quick Start Guide” largely says connect computer to ether2, and then browse to http://192.168.88.1, and on the “Quick Set” page you set both the LAN and WAN information. You do need to make sure the change the IP and the DHCP Range on the LAN side.
