How to block NHRP registration requests?

[fabio rocha]

Folks,

Is there a way to filter or block NHRP registration requests completely on a next-hop server? I know that's an odd question but there are good reasons to do this.

I have already tried several things and none of it has worked. I would be really amazed if someone knew or could come up with a way to do this.

Thanks in advance,

Fábio Rocha.

[Mohammed al Baqari]

can you put an ACL on the hub tunnel interface to block any communication
between spoke tunnel IP and hub tunnel IP.

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[fabio rocha]

>>can you put an ACL on the hub tunnel interface to block any communication
between spoke tunnel IP and hub tunnel IP.

Question is, I only want to block NHRP registration requests and nothing else regarding NHRP. I mean, the resolution and reply requests should not be blocked. I thought there might be a way of doing it using an access-list, but I did not find one.

If I could filter NHRP messages individually (like we can do with ICMP for example) an access-list would work.