Skip to main content

[ScreenOS] Firmware upgrade

screenos upgrade:


 Please find the upgrade process below to upgrade remaining firewalls (if boot loader and image key are proper there is no need to update them)

 1.       Upgrade the image key >> GUI access or Console + TFTP access is required.
 2.       Upgrade the OS >> CLI+TFTP access is required.
 3.       Upgrade the Boot loader >> Console + TFTP access required.
 The firewall is in cluster, to upgrade the backup unit first you will need manage-ip configured on it.

 Points to check before upgrading firewall:
 ++ Please check nsrp status ‘get nsrp’. There should be a master and a primary backup (PB) available.
 ++ Check the sessions on master and backup ‘get session info’ à this will ensure that session synchronization is happening properly.
 ++ Check the routes on both the firewalls and they should be identical.
 ++ Check whether both firewalls are in sync ‘exec nsrp sync globacl checksum’
 ++ All above checks are done whether backup firewall is in perfect sync with master and there is no issue. Check all these things again when you upgrade backup firewall and you are  ready to upgrade master.
 ++ After the backup firewall is upgraded and checked, use command ‘exec nsrp vsd-group id 0 mode backup’. This command will forcefully failover the master to backup.


 Please find below the Juniper KB with complete upgrade procedure:
 http://kb.juniper.net/InfoCenter/index?page=content&id=TSB16495 &actp=search

 Please refer to below mentioned Upgrade guide (page 24) which mentions the process of upgrading firewall in clusters.
 http://www.juniper.net/techpubs/software/screenos/screenos6.3.0/630_upg rade.pdf

Comments

Popular posts from this blog

[IDP Series] NIC Bypass

The Internal NICBypass helps prevent network outage due to IDP entering a hang state or experiencing high CPU utilization when the IDP device is in inline mode (transparent mode only). The internal NICBypass employs WatchDog Timers to achieve the functionality.
The nicBypass script which is located in /usr/idp/device/bin/ prevents the interfaces from going into bypass mode when the IDP is working normally by resetting the watchdog timer. It also restores the interfaces to normal mode if they had gone into Bypass mode. The nicBypass script performs this check and takes the action (if required) every "loopInterval" seconds (the script 'sleeps' for "loopInterval" seconds). 
These two parameters can be configured via the idp.cfg file on the IDP Sensor as shown below:                                                                                                               
nicBypass.watchdogInterval             10 (secs)  nicBypass.loopInterval             …

What is vSRX?

vSRX is a virtual firewall appliance for cloud environments. It runs as a VM on Hypervisors hosted on x86 hardware.

It is built on Juniper's OS (JunOS), however unlike FreeBSD linux used by JunOS earlier, vSRX is developed on top of Yocto Linux (WindRiver). This allows the appliance to perform better than any other Virtual Firewall in the market.

vSRX includes below features:
1. Full Stateful Firewall
2. Routing
3. VPN
4. IPS (Intrusion Detection and Prevention)
5. Application Firewall
6. Antivirus
7. AntiSpam
8. Webfiltering
9. Content-filtering
10. High Availability


[vSRX] Installing on KVM

Two ways
VirtManager(GUI)
virt install (cli)
Other ways (Qemu)

On Server:
uname -a
lscpu (architecture, support virtualization (VT-X), NUMA)
lspci / lspci -vvv |grep Ether
dmidecode
lsmod | grep kvm
virsh - qemu:///system list
virsh dumpxml <instance ID> (will show configuration file for the VM, similar to .vmx file in vmware)
virsh net-list --all
virsh domiflist <vm-name>
brctl show