Blocking snmp
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I was curious is it possible to block SNMP outbound on a specific client ?
A bit more info.
Theres a spammer on my friends network (A total of a few hundred hosts), He's running pfsense, Im sure I can find the spammer with tcpdump.I don't have access to the box right now or I probably would have figured this out by now.
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SMTP I assume then (Simple Mail Transfer Protocol)?
If you can identify them by IP then just create a firewall rule blocking access to 25/TCP for those IPs.