Different WAN and Public IP adress - RB2011UiAS-2HnD-IN

[Tunai]

Hi,

I have been using RB2011UiAS-2HnD-IN (as pppoe client) with my adsl modem in bridge mode for two years. 2 months ago I changed my ISP and there were no problems until yesterday.

First I noticed I cannot connect routeros and my home server from my office, I thought internet was down, but when I come home DDNS was giving error like “Request was sent from 212.x.x.x but your ip adress is 100.x.x.x DDNS might not work” and I was having problems opening web pages, some of them work, most of them not.

I contacted the customer support but as expected they dont know anything about the problem and tried to connect my modem but I said I dont use your device so Im on my own for now, until I get logical response to my ticket.

If I disable bridge mode, and use modem as pppoe client, I can access internet without problems even with pc > router > modem config.

But if I use adsl modem as bridge, I have problems as above. So is there anything I can do to fix these in routeros? Add other ip to routeros etc.

Any help is appreciated.

Thanks.

[ZeroByte]

@Tunai

Hi,

I have been using RB2011UiAS-2HnD-IN (as pppoe client) with my adsl modem in bridge mode for two years. 2 months ago I changed my ISP and there were no problems until yesterday.

First I noticed I cannot connect routeros and my home server from my office, I thought internet was down, but when I come home DDNS was giving error like “Request was sent from 212.x.x.x but your ip adress is 100.x.x.x DDNS might not work” and I was having problems opening web pages, some of them work, most of them not.

I contacted the customer support but as expected they dont know anything about the problem and tried to connect my modem but I said I dont use your device so Im on my own for now, until I get logical response to my ticket.

If I disable bridge mode, and use modem as pppoe client, I can access internet without problems even with pc > router > modem config.

But if I use adsl modem as bridge, I have problems as above. So is there anything I can do to fix these in routeros? Add other ip to routeros etc.

Any help is appreciated.

Thanks.

go to the terminal window and dump your configuration with /export compact
Then copy/paste the results into a text editor. Search for instances of your old IP address.
Chances are, there are some hard-wired references to your old public IP somewhere.
This will be the easiest way to find them.

[Tunai]

@ZeroByte

@Tunai

Hi,

I have been using RB2011UiAS-2HnD-IN (as pppoe client) with my adsl modem in bridge mode for two years. 2 months ago I changed my ISP and there were no problems until yesterday.

First I noticed I cannot connect routeros and my home server from my office, I thought internet was down, but when I come home DDNS was giving error like “Request was sent from 212.x.x.x but your ip adress is 100.x.x.x DDNS might not work” and I was having problems opening web pages, some of them work, most of them not.

I contacted the customer support but as expected they dont know anything about the problem and tried to connect my modem but I said I dont use your device so Im on my own for now, until I get logical response to my ticket.

If I disable bridge mode, and use modem as pppoe client, I can access internet without problems even with pc > router > modem config.

But if I use adsl modem as bridge, I have problems as above. So is there anything I can do to fix these in routeros? Add other ip to routeros etc.

Any help is appreciated.

Thanks.

go to the terminal window and dump your configuration with /export compact
Then copy/paste the results into a text editor. Search for instances of your old IP address.
Chances are, there are some hard-wired references to your old public IP somewhere.
This will be the easiest way to find them.

Thanks for the reply, I suppose I explained myself wrong.

My ISP gives me WAN IP adress from 100.x.x.x block but at the same time from 212.x.x.x block and websites shows my ip as 212.x.x.x. If I use routeros as pppoe client I cannot acess internet properly, but using my modem as pppoe and router I still get the 100.x.x.x as wan ip and websites still shows 212.x.x.x as my ip adress but internet works without problems.

So I thought maybe if I enter this 212.x.x.x ip adress somewhere in routeros maybe I can make it work too.

[lyberis1979]

@Tunai

Hi,

I have been using RB2011UiAS-2HnD-IN (as pppoe client) with my adsl modem in bridge mode for two years. 2 months ago I changed my ISP and there were no problems until yesterday.

First I noticed I cannot connect routeros and my home server from my office, I thought internet was down, but when I come home DDNS was giving error like “Request was sent from 212.x.x.x but your ip adress is 100.x.x.x DDNS might not work” and I was having problems opening web pages, some of them work, most of them not.

I contacted the customer support but as expected they dont know anything about the problem and tried to connect my modem but I said I dont use your device so Im on my own for now, until I get logical response to my ticket.

If I disable bridge mode, and use modem as pppoe client, I can access internet without problems even with pc > router > modem config.

But if I use adsl modem as bridge, I have problems as above. So is there anything I can do to fix these in routeros? Add other ip to routeros etc.

Any help is appreciated.

Thanks.

You are behind a NAT from your ISP, had the same issue here mate. Call your ISP to resolve it.

Good Luck. cheers

[Tunai]

@lyberis1979

@Tunai

Hi,

I have been using RB2011UiAS-2HnD-IN (as pppoe client) with my adsl modem in bridge mode for two years. 2 months ago I changed my ISP and there were no problems until yesterday.

First I noticed I cannot connect routeros and my home server from my office, I thought internet was down, but when I come home DDNS was giving error like “Request was sent from 212.x.x.x but your ip adress is 100.x.x.x DDNS might not work” and I was having problems opening web pages, some of them work, most of them not.

I contacted the customer support but as expected they dont know anything about the problem and tried to connect my modem but I said I dont use your device so Im on my own for now, until I get logical response to my ticket.

If I disable bridge mode, and use modem as pppoe client, I can access internet without problems even with pc > router > modem config.

But if I use adsl modem as bridge, I have problems as above. So is there anything I can do to fix these in routeros? Add other ip to routeros etc.

Any help is appreciated.

Thanks.

You are behind a NAT from your ISP, had the same issue here mate. Call your ISP to resolve it.

Good Luck. cheers

Hi,

I thought so. They called me few mins ago, telling me that they will look into this, I highly doubt that they will solve this as I wanted. Maybe my high download usage alerted my ISP to do this, but as long as Im using my own ftp server they cannot block any download with NAT.

But why modem works and routeros fails in this situation? Thats why I ask here, maybe some configuration save me the time and headache that I will surely suffer from my ISP.