Date: Wed, 14 Jun 2023 10:18:37 +0000 From: Benoit Chesneau <benoitc@enki-multimedia.eu> To: Alexander Chernikov <melifaro@FreeBSD.org> Cc: "freebsd-net@FreeBSD.org" <freebsd-net@freebsd.org> Subject: Re: can't add a /24 blackhole route with a /32 loopback Message-ID: <U2t98l4c8iB0VFmMFD9ET2Qd-xAeybUqjfNmvBPjEA5OBWiSpLdBRT9Ci6GHqryyLo8JJVnV4rMqNFvWiOKv-_6DkeVcpOTmf6c7HRAA-Qk=@enki-multimedia.eu> In-Reply-To: <0C23EFD2-1535-46B0-9E69-93D58B376CC3@FreeBSD.org> References: <9Jh8lSg93tjEc0-UEU3MQkGuQc7R9Aht0NBt4kEr6-wtgMdf673nws_jGaHelYwz0U78ik2BM4WLUca2JZAjrX-WSbP5QS4rsvoBHZo_JZo=@enki-multimedia.eu> <4DF565CC-D8AE-4F35-A7CF-7ED5AAD27B49@FreeBSD.org> <t_gT66nRcCT4fte7HbEMcM6J2spH-rEGFNYtZqX0GsUlxW4R5_pEVx3ZqtAwphKT4UBZsGZKX9gxeym1SKdc5GmceXGy1rRYEnSU1X6-_8c=@enki-multimedia.eu> <sgx1BljfJfV-Bn0PlfJ0va7yWHE9QraHpTjPBB6jlJWq4aehFwihem8C8f3ikkjvdEGIYY15S3ppTkQpWDfR3LDi_IKewBg7XQ1v9_u3SC4=@enki-multimedia.eu> <5747CC08-6903-4E2F-B0A5-D0CAB08F8165@FreeBSD.org> <0C23EFD2-1535-46B0-9E69-93D58B376CC3@FreeBSD.org>
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------- Original Message -------
On Wednesday, June 14th, 2023 at 11:56, Alexander Chernikov <melifaro@FreeBSD.org> wrote:
> Could you try:
> 1) removing the 1.1.1.0/24 route
> 2) removing the 1.1.1.1/32 from the lo1
> 3) provide the output for `route -n get 1.1.1.0/24`
> 4) provide the output for `route -n get 1.1.1.1/32`
> 5) assign 1.1.1.1/32 to lo1
> 6) provide the output for `route -n get 1.1.1.0/24`
> 7) provide the output for `route -n get 1.1.1.1/32`
> 8) provide the output for `route add -net 1.1.1.0/24 -blackhole`
>
Find the result below. Such thing worked on another machine, I am not sure why. No obvious logs.
```
# route -n get 1.1.1.0/24
route to: 1.1.1.0
destination: 1.1.1.0
mask: 255.255.255.0
fib: 0
interface: lo1
flags: <UP,DONE,STATIC>
recvpipe sendpipe ssthresh rtt,msec mtu weight expire
0 0 0 0 16384 1 0
# route -n get 1.1.1.1/32
route to: 1.1.1.1
destination: 1.1.1.1
gateway: 10.3.1.2
fib: 0
interface: vlan212
flags: <UP,GATEWAY,HOST,DONE,PROTO1>
recvpipe sendpipe ssthresh rtt,msec mtu weight expire
0 0 0 0 9000 1 0
# route delete 1.1.1.0/24
delete net 1.1.1.0
# route -n get 1.1.1.1/32
route: route has not been found
# ifconfig lo1 inet 1.1.1.1/32
# route -n get 1.1.1.1/32
route to: 1.1.1.1
destination: 1.1.1.1
fib: 0
interface: lo1
flags: <UP,HOST,DONE,PINNED>
recvpipe sendpipe ssthresh rtt,msec mtu weight expire
0 0 0 0 16384 1 0
# route add -net 1.1.1.0/24 -blackhole
route: writing to routing socket: Operation not supported
add net 1.1.1.0 fib 0: Operation not supported
# route -n get 1.1.1.0/24
route: route has not been found
```
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