Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    Is there any working site-to-site ipesec config?

    Scheduled Pinned Locked Moved IPsec
    19 Posts 3 Posters 6.3k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • B Offline
      bchristopeit
      last edited by

      If I change

      My identifier: My IP Adress
      Peer identifier: Peer IP Adress

      to

      My identifier: Distinguished name pfsense.localdomain
      Peer identifier: any

      I got:

      Aug 24 09:21:44 charon 15[ENC] <con1000|15>parsed INFORMATIONAL_V1 request 719346522 [ N(INVAL_KE) ]
      Aug 24 09:21:44 charon 15[IKE] <con1000|15>received INVALID_KE_PAYLOAD error notify

      this is from the other site

      Aug 24 09:30:36 charon 11[IKE] <6> no shared key found for 'pfSense.localdomain'[172.31.xxx.xxx] - '213.200.xxx.xxx'[213.200.xxx.xxx]
      Aug 24 09:30:36 charon 11[IKE] <6> no shared key found for 172.31.xxx.xxx - 213.200.xxx.xxx</con1000|15></con1000|15>

      1 Reply Last reply Reply Quote 0
      • DerelictD Offline
        Derelict LAYER 8 Netgate
        last edited by

        Both sides are pfSense 2.3.2?

        Chattanooga, Tennessee, USA
        A comprehensive network diagram is worth 10,000 words and 15 conference calls.
        DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
        Do Not Chat For Help! NO_WAN_EGRESS(TM)

        1 Reply Last reply Reply Quote 0
        • B Offline
          bchristopeit
          last edited by

          Yes

          1 Reply Last reply Reply Quote 0
          • DerelictD Offline
            Derelict LAYER 8 Netgate
            last edited by

            Then you might as well use IKEv2, AES-GCM, etc.

            Refer to the attached diagram.

            pfSense A

            Phase 1

            Disabled: unchecked
            Key Exchange Version: V2
            Internet Protocol: IPv4
            Interface: WAN
            Remote Gateway: 172.25.228.13
            Authentication Method: Mutual PSK
            My Identifier: My IP address
            Peer Identifier: Peer IP Address
            Pre-Shared Key: presharedkey (pick something random and strong here)
            Encryption Algorithm: AES 256 bits
            Hash Algorithm: SHA256
            DH Group: 14
            Lifetime: 28800
            Disable rekey: unchecked
            Disable Reauth: unchecked
            Responder Only: unchecked
            MOBIKE: Disable
            Split Connections: unchecked
            Dear Peer Detection: checked
            Delay: 10
            Max failures: 5

            Phase 2

            Disabled: unchecked
            Mode: Tunnel IPv4
            Local Network: LAN subnet
            NAT/BINAT translation: None
            Remote Network: Network: 172.25.234.0 /24
            Encryption Algorithms: AES256-GCM: Checked (Auto)
            Hash Algorithms: None checked
            PFS key group: 14
            Lifetime: 3600
            Automatically ping host: 172.25.234.1

            pfSense C

            Phase 1

            Disabled: unchecked
            Key Exchange Version: V2
            Internet Protocol: IPv4
            Interface: WAN
            Remote Gateway: 172.25.228.5
            Authentication Method: Mutual PSK
            My Identifier: My IP address
            Peer Identifier: Peer IP Address
            Pre-Shared Key: presharedkey (pick something random and strong here)
            Encryption Algorithm: AES 256 bits
            Hash Algorithm: SHA256
            DH Group: 14
            Lifetime: 28800
            Disable rekey: unchecked
            Disable Reauth: unchecked
            Responder Only: unchecked
            MOBIKE: Disable
            Split Connections: unchecked
            Dear Peer Detection: checked
            Delay: 10
            Max failures: 5

            Phase 2

            Disabled: unchecked
            Mode: Tunnel IPv4
            Local Network: LAN subnet
            NAT/BINAT translation: None
            Remote Network: Network: 172.25.232.0 /24
            Encryption Algorithms: AES256-GCM: Checked (Auto)
            Hash Algorithms: None checked
            PFS key group: 14
            Lifetime: 3600
            Automatically ping host: 172.25.232.1

            And firewall rules on the IPsec tabs on both sides that pass the traffic you need. An example is included that is wide-open. That might or might not meet your needs/threat model.

            pfSense+VPN.png
            pfSense+VPN.png_thumb
            ![Screen Shot 2016-08-24 at 1.07.08 AM.png_thumb](/public/imported_attachments/1/Screen Shot 2016-08-24 at 1.07.08 AM.png_thumb)
            ![Screen Shot 2016-08-24 at 1.07.08 AM.png](/public/imported_attachments/1/Screen Shot 2016-08-24 at 1.07.08 AM.png)

            Chattanooga, Tennessee, USA
            A comprehensive network diagram is worth 10,000 words and 15 conference calls.
            DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
            Do Not Chat For Help! NO_WAN_EGRESS(TM)

            1 Reply Last reply Reply Quote 0
            • B Offline
              bchristopeit
              last edited by

              Thanks it looks better but I got:

              PFSense A
              Aug 24 10:17:17 charon 10[CFG] received stroke: terminate 'con1'
              Aug 24 10:17:17 charon 10[CFG] no IKE_SA named 'con1' found
              Aug 24 10:17:17 charon 10[CFG] received stroke: initiate 'con1'
              Aug 24 10:17:17 charon 15[IKE] <con1|8>initiating IKE_SA con1[8] to 213.200.xxx.xxx
              Aug 24 10:17:17 charon 15[ENC] <con1|8>generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(REDIR_SUP) ]
              Aug 24 10:17:17 charon 15[NET] <con1|8>sending packet: from 172.31.xxx.xxx[500] to 213.200.xxx.xxx[500] (464 bytes)
              Aug 24 10:17:17 charon 15[NET] <con1|8>received packet: from 213.200.xxx.xxx[500] to 172.31.xxx.xxx[500] (464 bytes)
              Aug 24 10:17:17 charon 15[ENC] <con1|8>parsed IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(MULT_AUTH) ]
              Aug 24 10:17:17 charon 15[IKE] <con1|8>local host is behind NAT, sending keep alives
              Aug 24 10:17:17 charon 15[IKE] <con1|8>remote host is behind NAT
              Aug 24 10:17:17 charon 15[IKE] <con1|8>authentication of '172.31.xxx.xxx' (myself) with pre-shared key
              Aug 24 10:17:17 charon 15[IKE] <con1|8>establishing CHILD_SA con1
              Aug 24 10:17:17 charon 15[ENC] <con1|8>generating IKE_AUTH request 1 [ IDi N(INIT_CONTACT) IDr AUTH N(ESP_TFC_PAD_N) SA TSi TSr N(MULT_AUTH) N(EAP_ONLY) ]
              Aug 24 10:17:17 charon 15[NET] <con1|8>sending packet: from 172.31.xxx.xxx[4500] to 213.200.xxx.xxx[4500] (320 bytes)
              Aug 24 10:17:17 charon 15[NET] <con1|8>received packet: from 213.200.xxx.xxx[4500] to 172.31.xxx.xxx[4500] (80 bytes)
              Aug 24 10:17:17 charon 15[ENC] <con1|8>parsed IKE_AUTH response 1 [ N(AUTH_FAILED) ]
              Aug 24 10:17:17 charon 15[IKE] <con1|8>received AUTHENTICATION_FAILED notify error

              PFsense B
              Aug 24 10:17:17 charon 06[NET] <8> received packet: from 213.200.229.167[500] to 172.31.xxx.xxx[500] (464 bytes)
              Aug 24 10:17:17 charon 06[ENC] <8> parsed IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(REDIR_SUP) ]
              Aug 24 10:17:17 charon 06[IKE] <8> 213.200.229.167 is initiating an IKE_SA
              Aug 24 10:17:17 charon 06[IKE] <8> local host is behind NAT, sending keep alives
              Aug 24 10:17:17 charon 06[IKE] <8> remote host is behind NAT
              Aug 24 10:17:17 charon 06[ENC] <8> generating IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(MULT_AUTH) ]
              Aug 24 10:17:17 charon 06[NET] <8> sending packet: from 172.31.xxx.xxx[500] to 213.200.229.167[500] (464 bytes)
              Aug 24 10:17:17 charon 06[NET] <8> received packet: from 213.200.229.167[4500] to 172.31.xxx.xxx[4500] (320 bytes)
              Aug 24 10:17:17 charon 06[ENC] <8> parsed IKE_AUTH request 1 [ IDi N(INIT_CONTACT) IDr AUTH N(ESP_TFC_PAD_N) SA TSi TSr N(MULT_AUTH) N(EAP_ONLY) ]
              Aug 24 10:17:17 charon 06[CFG] <8> looking for peer configs matching 172.31.xxx.xxx[213.200.xxx.xxx]…213.200.229.167[172.31.xxx.xxx]
              Aug 24 10:17:17 charon 06[CFG] <bypasslan|8>selected peer config 'bypasslan'
              Aug 24 10:17:17 charon 06[IKE] <bypasslan|8>no shared key found for '213.200.xxx.xxx' - '172.31.xxx.xxx'
              Aug 24 10:17:17 charon 06[IKE] <bypasslan|8>received ESP_TFC_PADDING_NOT_SUPPORTED, not using ESPv3 TFC padding
              Aug 24 10:17:17 charon 06[ENC] <bypasslan|8>generating IKE_AUTH response 1 [ N(AUTH_FAILED) ]
              Aug 24 10:17:17 charon 06[NET] <bypasslan|8>sending packet: from 172.31.xxx.xxx[4500] to 213.200.xxx.xxx[4500] (80 bytes)</bypasslan|8></bypasslan|8></bypasslan|8></bypasslan|8></bypasslan|8></con1|8></con1|8></con1|8></con1|8></con1|8></con1|8></con1|8></con1|8></con1|8></con1|8></con1|8></con1|8></con1|8></con1|8>

              1 Reply Last reply Reply Quote 0
              • DerelictD Offline
                Derelict LAYER 8 Netgate
                last edited by

                You couldn't have possibly done that that fast. Delete what you have and start over. Carefully. It works. I have it working right here.

                Chattanooga, Tennessee, USA
                A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                Do Not Chat For Help! NO_WAN_EGRESS(TM)

                1 Reply Last reply Reply Quote 0
                • DerelictD Offline
                  Derelict LAYER 8 Netgate
                  last edited by

                  Aug 24 10:04:49    charon      08[NET] <con1|5>sending packet: from 172.31.xxx.xxx[4500] to 213.200.xxx.xxx[4500] (256 bytes)
                  Aug 24 10:04:49    charon      08[NET] <con1|5>received packet: from 213.200.xxx.xxx[4500] to 172.31.xxx.xxx[4500] (80 bytes)

                  You can't sent packets directly between an RFC1918 address and a public address. Either something else is in the middle you're not telling me about or you have the configuration screwed up. Slow down, be careful, do it right, and it'll work.</con1|5></con1|5>

                  Chattanooga, Tennessee, USA
                  A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                  DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                  Do Not Chat For Help! NO_WAN_EGRESS(TM)

                  1 Reply Last reply Reply Quote 0
                  • B Offline
                    bchristopeit
                    last edited by

                    Okay I will delete it and start again.

                    1 Reply Last reply Reply Quote 0
                    • DerelictD Offline
                      Derelict LAYER 8 Netgate
                      last edited by

                      If one side is behind another NAT device, you probably need to set "My identifier" on that side to be the actual public IP address - the one you see from there when you go to http://ifconfig.io/ for example.

                      My identifier: IP address: Actual public IP address

                      Like I said, every situation is different. There is no "universal walk through" to setting up a VPN.

                      Chattanooga, Tennessee, USA
                      A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                      DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                      Do Not Chat For Help! NO_WAN_EGRESS(TM)

                      1 Reply Last reply Reply Quote 0
                      • B Offline
                        bchristopeit
                        last edited by

                        WOHOOOOOO YOU ARE MY HERO !!!!! after I changed my Identifier to the public IP VPN is working. Now I have to setup mobile devices with greenbow. Could I use the same?

                        1 Reply Last reply Reply Quote 0
                        • DerelictD Offline
                          Derelict LAYER 8 Netgate
                          last edited by

                          I hope you take my advice and use IKEv2, AES-GCM, etc.

                          No idea about the remote access. Completely different thread required.

                          Chattanooga, Tennessee, USA
                          A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                          DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                          Do Not Chat For Help! NO_WAN_EGRESS(TM)

                          1 Reply Last reply Reply Quote 0
                          • B Offline
                            bchristopeit
                            last edited by

                            Thank you so much. I did it like your example :). Will create a new thread vor IPSec mobile.

                            1 Reply Last reply Reply Quote 0
                            • T Offline
                              timboau
                              last edited by

                              THANKS!
                              I was about to post this question (i might add it here for some additional key words relating to this)
                              –----------------
                              I've been reading about the 'issues' that might present in swanstrong for the authentication of identifiers that could be causing me problems. (possibly adding pre-shared keys?) I've been trying all sorts but just cant seem to hit a working configuration.
                              I have approx 25 remote PPPoE sites connecting to each other and to a static IP address great. I recently added a new site using Australian NBN (the customer IP is assigned via DHCP)
                              I cant get the new DHCP site to connect to the Static IP server, it connects fine to other PPPoE servers.

                              I'm running APU box and virtual pfsense routers:

                              Do you consider this VPN config the best all rounder settings?
                              What was key to this config allowing the DHCP to Static IP connections to work successfully?

                              1 Reply Last reply Reply Quote 0
                              • DerelictD Offline
                                Derelict LAYER 8 Netgate
                                last edited by

                                Connecting to a static IP address doesn't generally require anything special. Are you connecting from behind another NAT device?

                                Chattanooga, Tennessee, USA
                                A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                                DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                                Do Not Chat For Help! NO_WAN_EGRESS(TM)

                                1 Reply Last reply Reply Quote 0
                                • T Offline
                                  timboau
                                  last edited by

                                  Both IPs are fully Public IPs once being allocated by DHCP rather than PPPoE was the only difference I could discern - the other was always Static.

                                  Anyway - working a treat now :)

                                  Do you consider using those specs as a basic for all tunnels to be the most efficient/CPU wise v's no massive need for crazy security v's stability etc?

                                  I was previously using V2 DH2  P1-AES256 SHA1 / P2 AES128 Hash SHA1

                                  1 Reply Last reply Reply Quote 0
                                  • DerelictD Offline
                                    Derelict LAYER 8 Netgate
                                    last edited by

                                    AES-GCM in a child SA provides authenticated encryption and therefore does not require a separate authentication/hash step (like SHA1/SHA256) and will therefore perform better especially with AES-NI enabled.

                                    I personally believe that AES-128 is perfectly acceptable in almost all circumstances but you will not likely notice a difference between AES-128 and AES-256 so why not…

                                    So, yes, I like the settings I used in this example. That's why I used them. :)

                                    Chattanooga, Tennessee, USA
                                    A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                                    DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                                    Do Not Chat For Help! NO_WAN_EGRESS(TM)

                                    1 Reply Last reply Reply Quote 0
                                    • First post
                                      Last post
                                    Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.