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ENHANCEMENT: - Add enhancement against ICMP type3 code3 DoS attack. The following is the firmware upgrade procedure: If user did not backup the configuration file before firmware upgrade, please follow the procedures below: - Use Browser to login into ZyWALL/USG as administrator. - Click ... read more.
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Zyxel USG20-VPN Firewall Firmware 4.20(ABAR.2)C0 full details