USG 310 - public IP behind PPPoE

Lukas · January 2022

Hello,
how to correctly configure public IP behind PPPoE with dynamic IP? This is my configuration withou public IP:

! model: ZyWALL 310

! firmware version: 4.70(AAAB.0)

!

interface-name ge1 wan1

interface-name ppp0 wanTvinet

account pppoe TVINET

user ***

encrypted-password ***

authentication chap-pap

compression no

idle 0

!

interface wan1

type external

description TVINET VDSL

upstream 10000

downstream 50000

mtu 1500

ping-check default-gateway method icmp period 30 timeout 5 fail-tolerance 5 probe-condition any

no ping-check activate

ip address 0.0.0.0 0.0.0.0

!

interface vlan848

port wan1

vlan-id 848

description TVINET_VLAN_848

ip address dhcp metric 0

upstream 1048576

downstream 1048576

mtu 1500

type external

ip rip send version 2

ip rip receive version 2

ip ospf priority 1

ip ospf cost 10

!

interface wanTvinet

bind vlan848

description PPPoE TVINET

connectivity nail-up

account TVINET

metric 0

upstream 1048576

downstream 1048576

mtu 1492

ipv6 nd ra accept

!

Connection itself works fine, but I need to set the public IP - according to my ISP, they routed my public IP behind the dynamic IP address received on wanTvinet interface. Now I am not sure, where to set the public IP?

Zyxel_Tobias · February 2022

Hi @Lukas

Please help to log a ticket, so we can do a deeper Packet-Trace analysis and assist you:

https://support.zyxel.eu/hc/en-us/requests/new?ticket_form_id=114093996354

Regards,

Tobias

Zyxel_Tobias · January 2022

Hi,

you may use a SNAT in Policy Routing to send out WAN Traffic with Public IP from your ISP.

https://support.zyxel.eu/hc/en-us/articles/360001440613-Policy-Routes-USG-VPN-ATP-Different-scenario-usages-configurations

If you need to configure it on Dial-In, then these are the steps:

https://support.zyxel.eu/hc/en-us/articles/360005190500-Instructions-for-setting-up-a-hardware-ZyWALL-USG-series-gateway-using-a-static-IP-address-for-connecting-to-the-Internet

Kind Regards,
Tobias

Lukas · January 2022

Hi @Zyxel_Tobias,
Thank you for your answer.

I know how to configure pulic IP on direct ethernet connections, but I am not sure where to put public IP in this situation - on wan1 or vlan848? First thing I need to test is simple PING from Internet. I have tried to set the public IP on wan1 and then on vlan848 interface, but the PING did not work (even with temporary disabled firewall).

Zyxel_Tobias · January 2022

Hi Lukas,

on WAN1 should be fine, VLAN is only the Dial-in linking object here.

Regards,

Tobias

Lukas · February 2022

Thank you, @Zyxel_Tobias
I have put public IP (withou gateway - ISP did not privede any gateway) to the wan1 interface:

interface wan1

type external

description TVINET VDSL

upstream 10000

downstream 50000

mtu 1500

ping-check default-gateway method icmp period 30 timeout 5 fail-tolerance 5 probe-condition any

no ping-check activate

ip address *.*.*.* 255.255.255.254

!

I have temporary disabled firewall, but the ping from outside is not working. Ping from LAN side is working fine. What else should I check, so that the ping from outside Internet is working?

Zyxel_Tobias · February 2022

Hi @Lukas

Please help to log a ticket, so we can do a deeper Packet-Trace analysis and assist you:

https://support.zyxel.eu/hc/en-us/requests/new?ticket_form_id=114093996354

Regards,

Tobias

USG 310 - public IP behind PPPoE

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