FreeRadius not responding to requests from external host

[Matthew Newton]

On 09/03/2022 17:27, Darren Share wrote:
> If this is what you mean, this is it:
> 
> 14:55:13.682482 IP (tos 0x0, ttl 64, id 60077, offset 0, flags [DF], proto UDP (17), length 93)
>      172.31.1.36.58188 > 172.31.2.11.1812: RADIUS, length: 65
>          Access-Request (1), id: 0x0c, Authenticator: 563b39fc146c0193e012f3787be53c16
>            User-Name Attribute (1), length: 8, Value: darren
>            CHAP-Password Attribute (3), length: 19, Value:
>            CHAP-Challenge Attribute (60), length: 18, Value: ......#5|:O.....
> 
> The application is configured to retry three times, so I get three packets as above, and no response from FR.

So there's something on the system blocking the packets. iptables, 
ebtables, nftables, etc.

As Alan already said, FreeRADIUS will tell you if it receives packets. 
It's not saying anything, so it's not receiving anything. tcpdump is 
showing packets, so they're hitting the server.

Not much else to add here. It's an OS issue.

-- 
Matthew