IPsec site to site dropping every 49-55 minutes

TheStormsOfFury

@andrew_cb well, I have the rules as this one setup above, and it still timed out. Maybe I just need to set P2 to timeout at like 24 hours and then apply it and reboot at like 6:00 AM that way it will take it months to timeout during the working period.

It just seems odd that I have "Make before break" enabled, yet it isn't doing that.

Thinking about it, I have it set to WAN SUBNETS as the source as this uses CARP and VIP Ip address. Should I change it to just the "IP address" that is the VIP IP?

TheStormsOfFury

@viragomann @andrew_cb

So i have my firewall rule to block on the WAN VIP address to see if it will stop that 45-50 second down time.

I also performed a test and setup my tunnel times as follows:

Phase 1:

Lifetime 604,800 (7 days/168 hours)
ReKey 604,200 (10 minutes less than lifetime)
ReAuth 160 (2 minutes) (This might need to be 604,640)
Rand Time 60 (1 minute)

Phase 2:

86,400 (1 day/24 hours)
85,800 (10 minutes less than lifetime)
60 (1 minute)

The results were disastrously. The tunnels were resting every 45-50 seconds and it was creating multiple connection visible in the ipsec status.

I reset everything back to the original mentioned above, but we're still timing out at the 55-ish minute mark, which is not good during business hours as phone calls and app connections are failing.

I do have a question. If i am using make before break, do i still need "Phase One Child SA Close Action" to be restart? Shouldn't it be close?

Any thoughts? I'm about ready to move on and try wireguard.

TheStormsOfFury

I did a little checking and the tunnel is going down every 53 minutes 30 seconds (give or take a second).

Then it is down for approximately 38 - 40 seconds.

This is super strange that I have make before break enabled, but it is still doing this.

Thanks in advance!

TSoF

michmoor

@TheStormsOfFury said in IPsec site to site dropping every 49-55 minutes:

We are running CARP and both sites are running identical hardware (Dell R620) with pfSense 24.11-RELEASE.

A couple of things.

Are you using the WAN CARP address to establish your IPsec tunnels?
For your IPsec tunnels. Do you have gateway monitoring enabled?
Have you enabled DPD ?

TheStormsOfFury

@michmoor Thanks for the reply!

1.) I am using the shared Virtual IP address so that way if RTR1 goes down RTR2 can provide the services.

2.) I need to find that feature. inside Phase One there is a "Gateway Duplicate" that is disabled. Do you know where the "gateway monitoring enabled" is by any chance?

3.) DPD is enabled in Phase One on both side of the tunnel.

Thanks again!

TSoF

michmoor

@TheStormsOfFury said in IPsec site to site dropping every 49-55 minutes:

2.) I need to find that feature. inside Phase One there is a "Gateway Duplicate" that is disabled. Do you know where the "gateway monitoring enabled" is by any chance?

System /Routing / Gateways

TheStormsOfFury

@michmoor I found the Gateway monitoring setting in: System > Routing > Gateways > Edit

Gateway Monitoring - Disable Gateway Monitoring
This will consider this gateway as always being up.

Is this what you are talking about? Reading it, without it being checked gateway monitoring is enabled.

I went ahead and disabled the "Gateway Monitoring" and "Gateway Action."

Thanks again,

TSoF

michmoor

@TheStormsOfFury
I care more about Gateway Action. If that's set, lets unselect for now. Im assuming you are NOT in a multi-wan configuration

What that does is that if there is an issue with your gateway monitor IP (packet loss, jitter) this will bring down the IPsec connection in your case.

TheStormsOfFury

@michmoor said in IPsec site to site dropping every 49-55 minutes:

@TheStormsOfFury
I care more about Gateway Action. If that's set, lets unselect for now. Im assuming you are NOT in a multi-wan configuration

What that does is that if there is an issue with your gateway monitor IP (packet loss, jitter) this will bring down the IPsec connection in your case.

Correct, we are in a single WAN configuration. They were both "enabled" or "un-checked" and i went ahead and "checked" them on both sites

TSoF

michmoor

@TheStormsOfFury great. Let’s monitor IPsec stability.
How soon will you know if it dropped?

Edit: to be clear, disable gateway action is checked? It should be

TheStormsOfFury

@michmoor In about 5 minutes. That will be the 53 minute mark. I did make the changes on both sites as well.

Thanks!

TSoF

TheStormsOfFury

@michmoor no dice. Still timed out at 53 minutes and 29 seconds for 39 seconds.

Thanks for the suggestions! Open if you have any more.

my logs roll over so quick, i'll have to wait as it's already pushed out.

Thanks again!

TSoF

michmoor

@TheStormsOfFury

Have you read the suggestions here?

https://docs.netgate.com/pfsense/en/latest/troubleshooting/ipsec-connections.html#dpd-is-unsupported-and-one-side-drops-while-the-other-remains

TheStormsOfFury

@michmoor said in IPsec site to site dropping every 49-55 minutes:

https://docs.netgate.com/pfsense/en/latest/troubleshooting/ipsec-connections.html#dpd-is-unsupported-and-one-side-drops-while-the-other-remains

DPD is enabled on both sites; however, i did not have the periodic keepalive or ping set. I did go ahead and enable that and also changed it from "child actions" of restart / reconnect to close and clear SA. This time when I reset the tunnels instead of creating multiple connections, it only created one.

Now we wait 53 minutes and see what happens.

Thanks agian!

TSoF

michmoor

@TheStormsOfFury
If this doesnt fix i strongly feel there is some mismatch between the two. If you don't mind sharing your P1/P2 settings from each side. Pictures preferred.

andrew_cb

@TheStormsOfFury Yes, that rule looks correct now.
If you enable logging and call it something like "Block VPN subnets leaks to WAN" you can check under Status > System Logs > Firewall and see all the times that the rule is triggered.

andrew_cb

@TheStormsOfFury It might help to increase all the IPsec logging by one so that you can gather more data about what is happening during the re-keying. Also increase the size of the IPsec log so that more information is visible before being overwritten.

Also, does RTR2 show anything in its logs? I wonder if due to the way that IPsec is part of the kernel, maybe RTR2 responding to some of the traffic during the re-key?

TheStormsOfFury

@andrew_cb

So, inside VPN > IPsec > Advanced Settings

There is a list of 16 IPsec logging controls. Which would you recommend increasing so we can get the best results??

https://imgur.com/2g4WGXh

TheStormsOfFury

@michmoor So it still closed and I'm going to now past copies of the P1/P2 configs per site.

While I was taking these images, I was confirming that they were all identical. Let me know if you see something I missed.

Site 1 Phase 1: https://imgur.com/eldBRXO

Part 1: https://imgur.com/G4kEzHl
Part 2: https://imgur.com/x44xLAj
Part 3: https://imgur.com/N70XlmN
Site 1 Phase 2 ONE
Part 1: https://imgur.com/DYdObqD
Part 2: https://imgur.com/iwBOlBM
Site 1 Phase 2 TWO
Part 1: https://imgur.com/m1R7THi
Part 2: https://imgur.com/Q7PiEI0

Site 2 Phase 1: https://imgur.com/xgtr7Rh

Part 1: https://imgur.com/jckl5jQ
Part 2: https://imgur.com/x44xLAj
Part 3: https://imgur.com/TBvYo0b
Site 2 Phase 2 ONE
Part 1: https://imgur.com/PkvVr1R
Part 2: https://imgur.com/aBcSz2n
Site 2 Phase 2 TWO
Part 1: https://imgur.com/Of4Phes
Part 2: https://imgur.com/aksgmlq

michmoor

@TheStormsOfFury
Thanks for this and thanks for being organized in how you presented the pictures.

Curious. For picture https://imgur.com/Of4Phes

I noticed that the Local Network is set to 'Network' 10.0.1.0 which is different for the other site. Is this network not directly connected to pfsense? Is it routed (another gateway/router behind pfsense)?

edit: I don't think that's the problem just curious. Trying to better understand the environment.