[plug] Deny an internet connection on workstation

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Good day to all,   Questions: 1.) Is this the proper way to deny internet connection on workstation? (example: deny access of ip 192.168.10.210) Ipchains �A input �s 192.168.10.210- j DENY 2.) Are there any other ways? 3.) How do I allow again the workstation get access?   Thank you SUPERMAN         --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.434 / Virus Database: 243 - Release Date: 12/25/2002