I've recently purchased a cisco 837 ADSL router, which is running IOS
12.2. I have been using it with its default out of the box
configuration which includes NAT.
As I know very little about routers and IOS, but would like to learn
more, I thought I'd start out by experimenting with something quite
simple. I am trying to remove the following entry from the default
access-list 111 permit tcp any any eq 139
(Why is this in a default access-list? it seems very insecure to me)
So I copied the config to my windows TFTP server, removed the line,
shown above, from the config file and then copied it back. The problem
is when I copy it back I get an error "%pvc already member of PPPoA
dialer pool" as shown below:
copy tftp://10.10.10.2/NEWCONFIG running-config
Destination filename [running-config]?
Loading NEWCONFIG from 10.10.10.2 (via Ethernet0): !
[OK - 3235 bytes]
% pvc already member of PPPoA dialer pool
3235 bytes copied in 2.224 secs (1455 bytes/sec)
After this I can't access the internet, so I need to power cycle the
router to get back to the original config.
Any help greatly appreciated.