pppoe connection quandary

RouterOS Beginner Basics
1

Paying too much for a static IP from Centurylink but finally have it issued and setting it up in my RB450G
Setting up PPPoE is pretty straight forward. Followed a good forum post and the wiki. Connection to Centurylink is up:

[admin@MikroTik] /interface pppoe-client> monitor pppoe-out1
status: “connected”
uptime: 11m26s
idle-time: 0s
active-links: 1
service-name: “centurytel.net”
ac-name: “rb2-bras.bran-0A0M4120300063”
ac-mac: 00:30:88:17:40:53
mtu: 1480
mru: 1480
– [Q quit|D dump|C-z pause]

Only two rules in NAT, masquerade and a port forward for a server I will be running. No other rules or filters at this point:

[admin@MikroTik] /ip firewall nat> print
Flags: X - disabled, I - invalid, D - dynamic
0 X ;;; place hotspot rules here
chain=unused-hs-chain action=passthrough

1 ;;; masquerade hotspot network
chain=srcnat action=masquerade src-address=20.20.20.0/24 out-interface=pppoe-out1

2 chain=dstnat action=dst-nat to-addresses=20.20.20.238 to-ports=8080 protocol=tcp
in-interface=wan dst-port=8080

As you can guess, I am not getting out to the web.
Here is the setup for the PPPoE Client connection:

[admin@MikroTik] /interface pppoe-client> print
Flags: X - disabled, R - running
0 R name=“pppoe-out1” max-mtu=1480 max-mru=1480 mrru=disabled interface=wan user=“myusername”
password=“mypass” profile=default service-name=“” ac-name=“” add-default-route=yes
dial-on-demand=yes use-peer-dns=yes allow=pap,chap,mschap1,mschap2
[admin@MikroTik] /interface pppoe-client>

I can connect directly to a pc and setup the connection with no problems. It logs in and goes.
There is just something stopping the 450g from passing info and it wreaks of a firewall issue but I cannot see where.
Forum thoughts?

2 
/ip address print details; /ip route print detail

Other wild guesses: is it possible you need to reboot the provider modem/CPE when changing the device you hook up to it? Many require that, some even require a call to the provider. You could also try changing the WAN port MAC address to that of your PC. Can you ping out from the router itself with a small packet size?

And just out of curiosity: why did you change your inside, private IP space with unroutable addresses to 20.20.20.0/24 in your post?

3

I have the exact same situation. Hoping to find the answer. Will be watching this topic. Funny this is, mine worked fine for three or four months, then one morning, no more. Something had to change on Centurytel’s side because nothing changed in my setup.

4

Found it fellas
It was a DNS entry I made on my DHCP server. I removed that and I am in. I recall trying to ping IP addresses to verify that. In any event, I looked at the IP details of my PC and found the odd DNS entry.
As far as the 20 dot address, I did not change it in the post. Its the addressing I am using on the LAN/Hotspot side of the network. At least for bench time.
Thanks for chiming in.