Messages

1

General Discussion / Re: BGP network range traffic is blocked by firewall

« on: February 25, 2022, 10:06:07 am »

Thank you!
It did the trick.
I dont know how it worked so far, in a partial way.
Maybe due to reflection settings? I really dont understand. I thought it happens under the hood automatically (SNAT to BGP networks)

2

22.1 Legacy Series / Re: Routing issues after upgrading to 22.1

« on: February 22, 2022, 03:49:36 pm »

All three are already disabled (checkboxes are checked)
I use PCI passthrough to two network interfaces, directly managed by opnsense, so no virtio at all.
Simply two nics, igb0 assigned as LAN, and igb1 assigned as WAN.
No bridge for LAN since it is the only physical network card used for LAN, so I couldnt find reason for this at all (Should I create a bridge for only one nic?)

3

22.1 Legacy Series / Re: Routing issues after upgrading to 22.1

« on: February 22, 2022, 01:30:57 pm »

I have a similar setup - opnsense in proxmox, and I see tcp retransmissions in connectivity between my LAN network to my BGP network.
I dont have VLANs though, nor bridges, just WAN, LAN, and a BGP network advertised in my LAN network with a different subnet, which, any connections to it ends up with TCP retransmissions after a few packets.

Ronny - do you think there is anything that I could do to mitigate it? It sounds awfuly similar in behavior to yours, just that Im without VLANs.

4

General Discussion / Re: BGP network range traffic is blocked by firewall

« on: February 22, 2022, 10:13:54 am »

How come it is the application that is broken, if the only thing that is causing the troubles is the way I communicate with it via my router?
Doest it mean pretty much that I have a misconfiguration with the router? Especially since when I configure it to bypass firewall rules, everything does work as it should

5

General Discussion / Re: BGP network range traffic is blocked by firewall

« on: February 22, 2022, 08:11:51 am »

I do, Im just not sure how to explain them explicitly.
I have a specific service running at home, in that BGP subnet, which at the beginning traffic is flowing OK, but then at some point I see alot of TCP retransmissions from my laptop (tracing with wireshark)
Is there a better way to trace this from the point of view of opnsense to maybe gain better understanding what exactly is breaking here?

If I put that same service regularly to listen on the physical hardware and get ip address that belongs to my home LAN, access to it is working perfect - so it removes suspicion of the service itself being problematic.
If I connect from remotely, via openvpn server (on opnsense), and get assigned with an IP that belongs to openvpn subnet, then access to this service is again working flawlessly.
It only happens while Im on LAN IP address range.

If I go to Firewall settings - Advanced, and check "Disable all packet filtering" everything works well, from within LAN network

6

General Discussion / Re: BGP network range traffic is blocked by firewall

« on: February 21, 2022, 10:02:39 pm »

What firewall table is responsible for allowing/blocking such traffic between those two subnets?
I keep seeing the issue, not only with reset-ack flags,but ack, fin-ack etc. It constantly reproduces and I have no idea what to look at.
Is there anything else that I can do in order to track these connections and what is blocking them?

7

General Discussion / Re: BGP network range traffic is blocked by firewall

« on: February 20, 2022, 07:51:25 am »

Perhps from a different point of view, but how in general do firewalling takes place when the network is internal, yet not part of "LAN"?
Or is the BGP network considered LAN even though the network address range differs?
If I would like to create a block rule for a specific IP on my LAN network, from accessing one of my IPs in my BGP network, how would I define that rule and in what firewall table?

8

General Discussion / Re: BGP network range traffic is blocked by firewall

« on: February 19, 2022, 02:43:13 pm »

Hi, unrelated to the subject -  I really appreciate your work on the community repo :-)

I discovered this issue since I have a service which I access locally within LAN, and when I try to push data (POST ..., its a web service) I get connection resets.
I see it constantly, all the time.
When looking at the live view of the firewall logs, I see gigantic amount of such occurrances of dropped packets to the BGP network.
I dont see any such packets being dropped if I access remotely via openvpn.
I wouldnt say "from time to time", since the logs are full of such denied packets

9

General Discussion / BGP network range traffic is blocked by firewall

« on: February 19, 2022, 09:06:13 am »

I have the following setup for some time now, everything used to work perfectly fine:
Couple of hardware nodes running a kubernetes cluster, publishes ip addresses in the 10.50.0.0/24 network range.
all nodes are connected to opnsense and advertises the routes using BGP.
BGP nodes are all connected, established and I can see the routes properly in the routing table.
My LAN network is 10.0.0.0/24.
To configure the BGP 'stuff' I followed this guide

Im running the latest firmware 22.1.1_3, Im not sure anymore whether I had this issue previously with 21.7.
Most of my firewall rules are generic and pretty much the default in LAN network (see attachment)

When I actually try to access a service, direction out is passing, yet direction in is blocked (see attachment)
Im pretty much stuck, I cant leverage 'rid' to investigate the blocking rule because its a default rule.
So I went ahead and tried to setup an explicit rule in the LAN firewall rules to allow exactly such connections, and also added an explicit deny all rule to troubleshoot whether 'rid' will lead to this rule, but it didn't help.

Im not sure how to proceed from here, how do I set explicit firewall rules betwen my LAN network (10.0.0.0/24) and my BGP network (10.50.0.0/24)?