Hi,
I have a FortiGate 80c (firmware = 4.3.15).
Its WAN2 is connected to an ADSL modem and the IP address is acquired through DHCP from the modem. This connection is a fall-back Internet access in case WAN1 has problem, so IP traffic through it is very very few. Maybe that's the reason why it always lost IP address every few days. Yeah, I check the interface once every three or four days. Most of the time when I open Network > Interface, the IP/Network column for this interface is 0.0.0.0/0.0.0.0. And every time I have to "edit" the interface and click the "Renew" button to acquire the IP address again.
It seems like FortiGate "forgets" to request IP address after expiration date when there's no IP traffic.
Is there any way to make Fgt 80c request IP address from time to time?
Thanks
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I doubt that & had problems before with a fortigate and DSL provider ( century link ) , but here's what you can do to prove this;
1: install the modem on a window-server or linux-server runing dhcp services
2: adjust the lease time to a low value and make sure the unit maintains the lease
If the unit maintains the dhcp lease and request/ack than it's not the fortigate.
note: If your in a pinch you and have multiple interface, you could build 2 vdoms with a single interface in the vdom and server the 2nd vdom interface for testing using the dhcp-server of the fortigate
e.g
vdom == Server ( services the dhcp services )
vdom == Client ( is the dhcp client )
config sys int
edit port1
set vdom "Server" set ip 192.0.2.1 255.255.255.0 set allowaccess ping https ssh snmp set ident-accept enable set type physical set alias "dhcp-server" next
edit port2
set vdom "client" set mode dhcp set allowaccess ping https ssh snmp set ident-accept enable set type physical set alias "dhcp-client" end
and now the dhcp-server;
config system dhcp server edit 1 set default-gateway 192.0.2.1 set interface "port1" config ip-range edit 1 set end-ip 192.0.2.100 set start-ip 192.0.2.10 next end set lease-time 300 set netmask 255.255.255.0 set dns-server1 8.8.4.4 set dns-server2 8.8.8.8
set status enable next end
And just sit and monitor. Every 300secs the port2 interface will renew the lease from the dhcp-server in vdom Server.
BTW: I'm running 4 mr3 patch18 with zero problems.
PCNSE
NSE
StrongSwan
I don't understand what you meant by "install the modem on a window-server or linux-server runing dhcp services". You want me to replace the modem with the window/linux server? Or you want me to replace Fortigate with window/linux server?
Suppose it's the ADSL modem the source of the problem, what do you suggest me to do (without the VDOM-thingy that I don't quite understand)?
PS: I have just checked the connection and it is already down again! This time ADSL connection only lasted two days! That's a new record.
Does power cycling the modem hand out a new address or do you still have to click renew? If you have the testing ability to do so, do you have something else that can hand out DHCP addresses? Not ideal if you need a fail-over but plug that in to WAN2 and see if it drops the address. This way you can see if the problem replicates without the modem isolating the problem.
You also may want to call support on the DSL modem and have them check the leases. When it renews there may not be any available. Just a thought.
I don't understand what you meant by "install the modem on a window-server or linux-server runing dhcp services". You want me to replace the modem with the window/linux server? Or you want me to replace Fortigate with window/linux server?
oops, I meant interface directly. I'm so tie-up with modems(ADSL) ;)
Just cable the interface or any interfaces to a DHCP-SERVER and ensure it maintains the lease. You could test this with any freed interface on the fortigate b4 you bother the ADSL provider, but I'm guessing it's an ADSL modem issues like the above poster stated.
Is the ADSL-modem in a bridged or routed-mode?
PCNSE
NSE
StrongSwan
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