OPNsense Forum

Archive => 17.7 Legacy Series => Topic started by: stormy on January 11, 2018, 03:09:39 am

Title: Losing Default Gateway when Release/Renew of DHCP based port
Post by: stormy on January 11, 2018, 03:09:39 am

Is a known issue or something bad on my setup/steps? 

Using OPNsense 17.7.11-amd64 with PPPOE, I'm able to click RELEASE followed by RENEW on the INTERFACES:OVERVIEW page on the specific port and all works as expected after that.

However, when doing that RELEASE / RENEW on a DHCP connection (not pppoe), the link comes up, gets an IP, but no surfing is possible!

Comparing netstat -rn, before/after, shows that a single line is missing..... for the default gateway!

default x.y.z.q   UGS   igb1

The solution is to ssh into the opnsense box, and add a default gateway, e.g:

route add default x.y.z.q

and boom immediately all works fine..

Any thoughts welcomed..

Stormy.

Title: Re: Losing Default Gateway when Release/Renew of DHCP based port
Post by: mimugmail on January 11, 2018, 05:28:56 am

Is this a Multi WAN setup?

Title: Re: Losing Default Gateway when Release/Renew of DHCP based port
Post by: eugenezv on January 14, 2018, 07:32:59 am

Hello.

Same problem. No multi WAN. After upgrading 16.7->17.1->17.7 (two routers) all PCs in both LANs have lost access to the Internet.

In network adapters properties no default gateway address appears.

As temporary workaround used static addressing of PCs.

Title: Re: Losing Default Gateway when Release/Renew of DHCP based port
Post by: stormy on January 15, 2018, 04:34:38 pm

My setup is sort of Multi-WAN, the second NIC/port is not enabled.

I had this port:  3WANC interface (wan, pppoe0)

but, i've stopped using pppoe for the time, and that port is DOWN.

Instead i got:  4WANH interface (opt2, igb1)

and that is setup as DHCP, it can surf the net, however, clicking RELEASE/renew on that port, causes the above effect, in that default gateway is missing.  I must ssh into the opnsense, and add a default gateway, then all connected devices can surf the internet.

Thanks.

Title: Re: Losing Default Gateway when Release/Renew of DHCP based port
Post by: seph04 on January 30, 2018, 12:57:41 am

Same issue here. OPNsense 17.7, fresh VMWare install

Dual-wan setup with load balancing

WAN port -> Static IPv4
OPT1 -> DHCP

Gateway on WAN port configured as default gateway
Gateway on OPT1 port configured as dynamic


Sometimes DHCP internet connection goes down and DHCP release/renew fails to obtain an IP address.
When this happens system loses internet access and checking for updates fails, 1:1 nat to virtual IPs fails too.

In system -> routes you can see "default" destination route changes its gateway from the ip address of the default gateway on WAN interface to "link #3" (OPT1 interface).

To "fix" this I go to Interfaces -> Overview -> OPT1 release
Then System -> Gateways -> All and edit gateway on WAN interface.

Untick/save/apply/tick/save/apply on "default gateway" checkbox and system can check for updates again.
To restore 1:1 nat mappings I have to delete virtual IPs entries and recreate them again.

In system -> routes you can see "default" destination route changes back to the gateway on WAN interface.