Juniper SRX DHCP Server
I am adding a new VLAN to my network and I need my SRX to hand out IP addresses for that subnet. The vlan number I am using is 19. I am calling this network PUBLICVLAN Set up the irb … Continue reading →
Category Archives: Juniper
JunOS : Versions running on dual partitions are not same
This appears on the console when booting a Juniper device: WARNING: JUNOS versions running on dual partitions are not same This will happen on an upgrade of JunOS. To resolve this issue, make sure you are currently booted on the … Continue reading →
Restore Juniper SRX from backup
Assuming you backup your SRX every time you make a change (see here) , you may have a need one day to restore your settings. To do so root@srx# load replace scp://username:password@IP.Of.Backup.Server/path/NameOfConfigFileToLoad.conf.gz root@srx# commit Where: username is a username … Continue reading →
Juniper SNMP Settings
SNMP V1 and V2c set snmp location “Text String That Indicates Where This Is At” set snmp contact “usually@MyEmail.com” set snmp community MyCommunityString authorization read-only set snmp community MyCommunityString clients ip.addresses.allowed.access/24 set snmp community MyCommunityString clients moreip.addresses.allowed.access/24 SNMP V3 set … Continue reading →
SRX Dual ISP Failover
I have a simple situation – I have two ISP’s. The gateway of my primary (i.e. providing the fastest service) is 9.9.9.9. The gateway of my secondary isp is 8.8.8.8 # My default route via my primary ISP set routing-options … Continue reading →
Configuring DNAT on Juniper SRX300
I have a web server (10.9.21.17) behind my Juniper SRX firewall. I want to make it available to the Internet. I have one static public ip address (1.1.1.116) and it is bound to the interface facing the Internet edit security … Continue reading →
Alarms on your new Juniper equipment
You get your new Juniper switch configured, everything is working well then you notice the alarm light is on! Dont panic! First: Issue the command: root@switch> show system alarms and (hopefully) you will see one or more of the following: … Continue reading →
Juniper – How to configure NTP
Below provides the basic commands for configuring the date, time and NTP on your Juniper Set the time either set date ntp or set date YYYYYMMDDHHMM Set the name servers set system name-server your.name.server.1 set system name-server your.name.server.2 commit Configure … Continue reading →
Using SCP to back up Juniper Router Configs
srx1> start shell % scp /config/juniper.conf.gz username@myserver.domain.com:/someplace/myrouter.conf.gz Where: /config/juniper.conf.gz will be the latest config that you saved with the “commit” command username – is the username to use to authenticate to the server you are copying the config to myserver.domain.com … Continue reading →
DHCP and/or Ping does not work on inside interface on SRX 300
Problem: Traffic passes through to the outside/Internet on SRX, but the dhcp server does not assign ip addresses and you cannot ping the SRX from the inside Solution: The system services were blocked on the inside network. Example as follows: … Continue reading →