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New Member

udp port 0

have notice that one of our nodes UNIX server is sending udp packets to many nodes on the internet and the nodes are replying back to the server using udp packets. this consume about 512kbps , and the attack is into port 0 (udp port 0). we have implement access-list to deny the udb into port 0 , but it didnt work????, can the router deny udp port 0 , if not , how can i solve such a problem. thx

3 REPLIES
Bronze

Re: udp port 0

You can specify the access-list to deny any address (source or destination) and any port (source or destination). Ensure that you have configured the access-list correctly, and that you have applied it to the correct interface and in the correct direction (in or out).

New Member

Re: udp port 0

ok i did that , but deny udp port 0 is not working ,it seem that the router dont deny (filter) port 0.....??

Silver

Re: udp port 0

Deny all udp only except ports you want to allow. Log all denys if you want record of them. Hope this gives you what you want.

Regards,

Don

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