Hello Peter! I'm not using the Split DNS on my router yet! Let me explain what's happening. I have a web server running on my private network on the machine 10.10.10.11 and I can access it using the mentioned address. This server have a FDQN and I can reach it from outside my network (Internet) without any issue. I would like to use the FDQN to access it from machines inside my private network, but I cannot due to some security feature on cisco router. I have read some articles stating we need to have a "Split DNS" to allow machines inside the private network can access the web server on the address 10.10.10.11 using the FDQN, as machines outside the private network do. I tryed to find a simple "Split DNS" to try here, but I didn't found any that could be used. All I have found are very complex examples. I'm using the following firmaware on the router: HomeNet#sh version Cisco IOS Software, 1841 Software (C1841-IPBASEK9-M), Version 12.4(24)T3, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2010 by Cisco Systems, Inc. Compiled Tue 23-Mar-10 05:11 by prod_rel_team ROM: System Bootstrap, Version 12.4(13r)T5, RELEASE SOFTWARE (fc1) HomeNet uptime is 23 hours, 37 minutes System returned to ROM by power-on System image file is "flash:c1841-ipbasek9-mz.124-24.T3.bin" I'm not using Cisco Router as a DHCP server, since I have a Linux machine running ISC-DHCP-SERVER on my network. I have attached some pictures to ilustrate the issue, one accessing using FDQN and other using server IP address.   Best Regards! Marcio ... View more

Hi Paul, I have copied default configuration from flash to startup-config and tryed again. Despite that, I got the same error again, but instead of stop doing the configuration I have continued. At the end the connection has been estabilished and all the users inside the Lan network are now reaching external sites pages. Regards, Marcio ... View more

Hi Paul, I tryed to configure the router as you have suggested but the same error appear every time I try to enable pppoe in any of the FastEthernet Interfaces, as following: Int fa0/0 descritption DSL Interface no ip address ppoe enable PPPoE create bba subblock failed Another issue is when I tryed to configure " ppp chap sent-username USERNAME password P@ssw0rd (this is the password that ISP gave it  to you" In this case I got the following error: Router(config)#int Dialer1 Router(config-if)#ip address negotiated Router(config-if)#ip mtu 1492 Router(config-if)#encapsulation ppp Router(config-if)#dialer pool 1 Router(config-if)#ppp chap sent-username XXXXXXXXXXX password XXXXXX                             ^ % Invalid input detected at '^' marker. No matter how I try to do this I get the same error. Regards, Marcio ... View more