How can I block websites on a cisco asa 5510 firewall.
All websites or specific ones?
If you want to block all web traffic, a straightforward rule preventing HTTP traffic (TCP port 80) as well as HTTPS (port 443) will block any and all web access.
If you just want to block specific sites, I'd recommend an access control list (ACL) configured to deny traffic to those specific site's IP addresses.
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