发布日期：2013年4月1日

兼容性问题：

• 从3.x.x或者之前的固件版本升级到v4.2.0-22，必须恢复到出厂设置。而且不能导入之前版本的配置备份文件。

新特性

• WAN口支持SNMP
• 实现了SNMP trap的NMS支持
• 添加IPv6的Auto-failover
• 支持IPv6 NMS
• SSL VPN 支持windows 8

解决修复问题

• Can,t record LAN-WAN inbound firewall logs.
• WAN to LAN Drop log is not record.
• MIB Browser walk "netgearVPN" notes timeout.
• After rebooting DUT, secondary WAN is up.
• There are no SNMP trap log received when configure "VPN->Certificates".
• The SNMP trap log error when establish IPv4 SSL VPN tunnel.
• There are no SNMP trap received when establish/disactive IPv4 SSL VPN Port Forwarding tunnel.
• After unplugging and plugging primary WAN port network cable, Auto rollover function cannot work normally.
• IGMP-pass through in Load Balancing mode.
• Experiencing packet loss.
• IPv6 DMZ cannot enable when IPv4 DMZ is disable.
• Syslog full with Error: [Kernel 2] messages.
• After reboot ipv6 wan is not getting up, when the ipv4 wan is down.
• IPv6 WAN2, WAN3, WAN4 stateful IP is not getting flush after changing DHCPv6 server mode to stateless from stateful.
• "Block UDP Flood" option is in enabled state by default.
• When VPN Pass through is disable,IPv6 IPsec VPN also can establish.

已知问题

• IGMP snooping functionality is not working.
• Bandwidth functionality is not working over VPN GW-GW tunnel.
• Device accepting the ports opened in UPnP port map table as remote management customer port.
• Updated  dyndns domain name is not reflecting in the ike policies.
• Able to run Port triggering inbound traffic with the open port from any WAN hosts.
• Send email logs for schedule is not working for hourly ,daily, monthly policies.
• Unable to send the logs over vpn tunnel.
• [IPv6]Auto rollover is not working when IPv6 WAN is configured for PPPoE over IPv6 ISP.
• SNMP TRAPS not coming when ssl port forwarding tunnel is established.
• NFS service support: Only support NFS v4 "mount" command, do not support NFS v2, v3 and "showmount" command.

升级办法：

1. 点击下面的按钮下载升级文件到你的电脑上。
   
     26.4M
    
2. 通过浏览器登录到管理界面，点击 Administration>Settings Backup & Upgrade 管理菜单，在 Router upgrade 选项中点击“浏览”，选中刚才下载的升级文件。
   
3. 点击Upgrade。
   
4. 等待文件传输完毕，路由器将会重新启动，等待直到路由器的 TEST 指示灯熄灭之后，路由器的升级完成。
5. 通过路由器前面面板的Facotry Default 按扭或管理界面 Administration>Settings Backup & Upgrade 的Default 按扭恢复出厂设置值。 
   

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