OPNsense Forum

English Forums => 24.1 Production Series => Topic started by: MadDieAxx on March 08, 2024, 08:28:37 am

Title: PPPOE / Connection Problems
Post by: MadDieAxx on March 08, 2024, 08:28:37 am

I get FTTB from my ISP with an RJ45 port comming to my appartment.
I need to log me in with PPPOE.

So I set up my WAN port with my PPPOE credentials and i get my public IP 79.133.XXX.XXX and my Gateway 93.91.XXX.XXX.
No modem between my opnsense and my isp port.

Now i made any any firewall rules on WAN and LAN interface.

But my problem is, I cant get to the internet. I cant ping 8.8.8.8 from my PC connetet on LAN. But also from the opnsense itselfe i cant ping 8.8.8.8.

On the firewall logs i see outgoing packets, but no incomming packets that are blocked.

I use the default outgoing NAT rules on my WAN interface.

I also tried to make a route 0.0.0.0/0 to my gateway. But it makes no difference.

A very strange thning is, that i can ping my public ip 79.133.XXX.XXX from my phone using mobile data.

I feel like im missing some essential setting.

Here some screenshots: https://imgur.com/a/dO732Eg

Someone here who can help me?

Thanks!

Title: Re: PPPOE / Connection Problems
Post by: sja1440 on March 08, 2024, 06:48:46 pm

(1) I see that you have pppoe directly over the physical interface (igcxxxxx).

In Italy, ISP pppoe access is always, as far as I know, over a vlan.

Are you certain that you do not need pppoe over a vlanto access your ISP?

(2) I see that you have vlan's on your internal interfaces. Have you set Promiscuos mode on the underlying  igcxxx interface?

(3) Could you please do a packet capture in promiscuous mode on igc1 (not the pppoe interface) when you ping from OPNsense.  What do you see?

Title: Re: PPPOE / Connection Problems
Post by: MadDieAxx on March 09, 2024, 08:43:08 am

SOLVED:
I had to disable firewall packet filtering in advanced firewall settings.
After re enabling it, it worked!

Title: Re: PPPOE / Connection Problems
Post by: sja1440 on March 09, 2024, 09:56:02 am

From you description of how you fixed the problem, it sounds as if you might have made some firewall changes but didnt then clear the firewall states (at Firewall: Diagnostics: States->Reset State Table).  If it happens again, then try resetting the states rather than disabling and then renabling the firewall;-)   Of course you could also reboot if you prefer.

Title: Re: PPPOE / Connection Problems
Post by: MadDieAxx on March 09, 2024, 01:03:10 pm

I did a couple of reboots and also a factory reset. Very strange. But my problem is solved, so i am happy!

Title: Re: PPPOE / Connection Problems
Post by: RamSense on March 09, 2024, 05:42:59 pm

but when you checkmark Disable all packet filtering. you get: Warning: This will convert into a routing-only platform!
Warning: This will also turn off NAT!
If you only want to disable NAT, and not firewall rules, visit the Outbound NAT page.

is that what you want?