New Features and Enhancements:
- Supports Scheduled system reboot
- Scheduled WAN restart
- SSL VPN Wizard
- Optimization of firewall rules movement (UP/DOWN)
Issue(s) resolved since last release v4.3.0-19 :
- In load balancing mode able to see packet on WAN2 interface SNAT with WAN1 IP and vice versa
- Not able to add static route with subnet mask of class A and class B for class C IP address
- SIP module is running when ALG in disable state
- Can't disable DMZ with specific configuration
- Support for SSL VPN in windows 8 64-bit machine
- When Router's MAC Address type is "Use this computer's MAC Address" or "Use this MAC Address", Router RADVD can't get IPv6 Advertisement Prefixes by WAN stateless prefix Delegation
- When load balancing is enabled, DDNS can't work normally
- Customize SMTP settings
- Octet 4 of IP address do not support 255 in remote management page
- When WAN2,WAN3 and WAN4 are down, WAN2,WAN3 and WAN4 Tx Pkts value are not 0 in Router Statistics page.
- When Load Balancing is enabled, DDNS can't work normally
- SNMP subnet mask Octet 1,2,3 only input 255,the Octet 4 cann't input 255
Known Issues and limitations:
- Bandwidth functionality is not working over VPN GW-GW tunnel
- No NAT translation of SIP headers during register, outbound call and SDP
- Observed Inconsistant behaviour with voice traffic when server is lying in LAN and DMZ side
- Unable to establish the fourth call from LAN side
- Unable to establish the IPv6 manual tunnel with traffic selector as Any/Any
- Not able to run multicast traffic over L2TP
- Not able to do NetBIOS over L2TP tunnel
- Displaying the message as address not found instead of 'Blocked from this Browser' for IPv6 policy 'Deny Login From Defined Browsers'
- Able to Configure IPv6 Address pools and DMZ Adverisements prefixes through CLI when DMZ is not enabled
- Firewalllogs6 table is not updating properly for enabling and disabling logs through CLI
- Able to run Port triggering inbound traffic with the open port from any WAN hosts
- Voice traffic is not exchanging between windows live messangers
- Unable to configure IPsec VPN policies using WAN IP aliases
- Unable to run traffic over IPsec VPN client tunnel when Encryption Algorithm is null in Phase-2 parameters
- Unable to send the logs over VPN tunnel
- Daylight saving functionality is not working for time zone "GMT-0"
- PPPoE over IPv6 WANs are getting restarted and IPv4 WAN is not responding after changing WAN mode for multiple times
- Able to establish VPN GW-GW tunnel with mismatch user-FQDN and able to run traffic
- Traffic is not following WAN upload or download(higher one of them )speeds if the upload and download speeds having large difference
- Establish L2TP connection from WAN secondary addresses fail
- Able to select same WAN for both primary and secondary WANs for auto rollover WAN mode in IPv4/IPv6 dual stack mode
- IPv6 IPsec VPN Passthrough functionality is not working
- Unable to get the IP to LAN host after rebooting the device continuously for overnight
- SSL-VPN client is getting disconnected after establishing maximum tunnels
- NFS service support: Only support NFS v4 "mount" command, do not support NFS v2, v3 and "showmount" command
Installation Instructions:
- Using the Download Link below, download and extract the new firmware to a convenient place such as your desktop. The filename after extracting is srx5308_v4.3.1-22.img
Download Link: http://www.downloads.netgear.com/files/GDC/SRX5308/SRX5308_V4.3.1-22.zip
Note: Reboot the firewall before begining the update process.
- Select Administration > Settings Backup and Firmware Upgrade from the main/submenu.
- In the Router Upgrade section, click Browse.
- Locate the downloaded file and click Upload.
This will start the software upgrade to your VPN firewall. This may take some time. Do not interrupt the upgrade process.
At the conclusion of the upgrade, your firewall will reboot.
Last Updated:10/17/2025
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Article ID: 24624