IPsec

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  Unexpected traffic hitting IPsec interface
  • Slugger  

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  @Slugger said in Unexpected traffic hitting IPsec interface: Basically I'd just like to know how I might go about troubleshooting this if I didn't know which peer was producing the packets. Excellent question! My understanding is that all packets are delivered to the kernel from the same place, so the encapsulation envelope information is lost by the time it is hitting the firewall. Maybe turn on debug on IPsec and look at the logs? See Advanced Settings > IPsec Logging Controls > IPsec traffic; you could try the diag or raw setting and have a look at what gets logged. Keep in mind if you make that sort of change, I think it will restart the tunnels.
• B

  IPSEC VPN tunnel between pfSense 2.4.4 and Draytek keeps rebuilding
  • bramqu  

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  Hi Bram, How is the connection going to the Draytek. I tried v1 and had far more success but it still randomly dropped the connection and doesn't reconnect in a very timely manner. Super frustrating... Do you have the config for both sides you ended up on if its been very stable? Thanks,
• Z

  Can establish outgoing connections through IPsec tunnel but can't establish incomming connections
  • zoquero  

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  Pfsense ipsec to Cyberoam traffic issue
  ipsec • • pek44  

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  I try change mode from tunnel IPv4 to Route (VTI) but after change IPsec not connect.
• K

  IPSec Tunnel Issue.
  • Kevin S Pare  

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  I would start here.
• M

  how to connect other building site to main site using vpn??
  • marksantos  

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  Just create both phases of an IPSec tunnel in one. Settings are pretty intuitive. Then do the same at the other end, matching and reversing the relevant settings. Then test using endpoints, not the UI
• O

  IPSec pfSense to Unifi USG
  • orangehand  

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  As I posted elsewhere, you CANNOT test the VPN via the UI Ping utility. It always fails. You need to test the tunnel using endpoints. I am assuming this is a small bug?
• O

  IPSec tunnel to Unifi USG up but no traffic passes
  • orangehand  

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  Doh - there was never an issue it seems. BEWARE: unless I was doing it wrong (using defaults) you cannot test the VPN by pinging the other end from within the UI; you have to test using endpoints. Wasted hours on that one!! Netgate, is that a bug?
• S

  pfSense IPSEC VPN to Azure VM no Internet
  • SlevinBKelevra  

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• U

  Ipsec PfSense Host traffic not to VPn Tunnel
  • UnknownNR1  

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  shame on me found this Thread, solved it. https://forum.netgate.com/topic/146217/traffic-from-firewall-trough-ipsec-tunnel-fails/2
• A

  Avaya VPN to Virtual PFSense using IPSec Mobile
  • Alastair  

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  Update After doing some wireshark traces I concluded the traffic was not getting back to the phone. I was able to identify a routing issue that was causing the problem and resolve it. I have now been able to connect the Avaya VPN handset through the IPSec tunnel to my phone system. So just in case anyone else tries to set this up the the following settings in the Avaya handset work: VPN VENDOR - OTHER Gateway address - 0.0.0.0 (set by DHCP) External Phone IP Address 0.0.0.0 (set by DHCP) External Subnet - 0.0.0.0 (set by DHCP) External DNS - 0.0.0.0 (set by DHCP) Encapsulation - 4500-4500 Copy TOS - No Auth Type - PSK with XAUTH VPN User TYPE - any VPN User -vpnuser VPN PW - * IKE ID (Group Name) - none Pre-Shared Key (PSK) - * IKE Phase 1 IKE ID Type - IPV4 ADDRESS IKE Xchg Mode - Aggressive IKE DH GROUP - 2 IKE Encryption Alg - AES-256 IKE Auth Alg - SHA-1 IKE Config Mode - Enabled. IKE Phase 2 IPSEC PFS DH Group - No PFS IPSEC Encryption Alg - AES-256 IPSec Auth Alg - SHA-1 Protected Network - 0.0.0.0/0
• V

  Windows 10 can't connect with IKEv2 with EAP-TLS
  • vitormazuco  

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  @kiokoman apear the policy mismatch error, and continues with this error https://serverfault.com/a/537556 but It not fix on me
• L

  Any limitations on the # of IPsec tunnels on PFsense community edition?
  • lionelgalvan1  

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  No limit in the code, though there might be practical limits based on your specific set of circumstances. Perform normal troubleshooting and log evaluation and communication with the other side as to why that tunnel will not come up.
• L

  IPSec - Set specific external interface
  • leacho73  

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  @jimp Perfect, works a treat! - thank you for your help!!
• F

  [Version - 2.4.4-RELEASE-p3(amd64)]Changing Phase 1 Key Exchange version to IKEv2 messes up ipsec status command output
  • fawo123  

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  You don't have to check that box, but you can. IKEv2 is more efficient there, it doesn't need to separate all those out. Some other equipment (notably Cisco) doesn't like that, though.
• T

  IPSEC DNS Traffic issue
  • TechUnplugged  

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  Great Apply IP addresses and networks to all of that and show your configuration. Need to see all of the interfaces, all of the interface rules including IPsec tabs, all of the IPsec configuration, etc. Then explain exactly what is NOT working in a manner such that there is no guessing involved.
• D

  No Site To Site L2TP on PfSense ?
  • denis31  

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  @denis31, I wouldn't expect many people on this forum to know what / how the Motorola RFS L2TPv3 link works, however, as luck would have it, I do. I'm assuming you have another RFS at the other end of the L2TPv3 link. I've never tried do to what you are looking to do with pfSense, I'd have to spin up a lab to have a crack at it. Ultimately, I'd suggest you have a rethink on how you can replace the L2TPv3 link with an IPSEC link. You can configure the RFS to run an IPSEC tunnel to pfSense, its not as simple to configure as L2TPv3 by any stretch, but it works. If you are using the L2TPv3 to do stuff like adopting remote APs, you will ultimately have to migrate your environment from Bridged tunnelling to Local egress.
• L

  Reach mobile client from LAN via IPsec tunnel
  • lemonfan  

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  Some more debugging on the fw: ping 192.168.2.145 Generates ICMP echo request packages on the gw interface (sk0/sk2), no ICMP echo reply is received (obviously). Result: ping command gets no answer. ping -S 192.168.1.10 192.168.2.145 Generates ICMP echo request packages on the ipsec interface (enc0) and the clients answers back with ICMP echo reply packages. Result: ping command is ok. route add 192.168.2.144/28 192.168.1.10 ping 192.168.2.145 Generates ICMP echo request packages on the ipsec interface (enc0) and the clients answers back with ICMP echo reply packages. Result: ping command is ok. BUT: Even with the above route, i can ping the client only from the fw itself, but not from the network. I`ve also tried playing with NAT rules to force the fw source address, but no lock so far. Any further idea to solve the problem?
• M

  IPSEC Service not starting after initial install
  • macaddict89  

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  ugh I'm not smart
• R

  Traffic from Firewall trough IPSEC Tunnel fails
  • Rolfieo  

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  Also, you might be better off using VTI.
• D

  SG-3100 - routing all internet access over IPSEC tunnel
  • dhb  

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  What I found interesting was there was traffic on the wan side of the local router that appeared to be going directly to the sftp server. I expected this to all be inside the IPSEC tunnel. If that is the case (I have not looked at the captures) you are not routing/policy routing the traffic into the IPsec correctly.
• G

  found 1 matching config, but none allows pre-shared key authentication using Main Mode
  • Gorf  

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• F

  Ip Sec
  • felipe_antocheski  

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  Not sure what you mean. You may be better posting here:- https://forum.netgate.com/category/67/pfsense-international-support
• M

  Valid configuration for IKEv2 VPN for iOS and OSX
  • matp  

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  @shpokas said in Valid configuration for IKEv2 VPN for iOS and OSX: This hint worked for me, on both IOS and OS X. https://lists.strongswan.org/pipermail/users/2015-October/008842.html For details on my setup, please see https://forum.cheapessaywriter.org/index.php?topic=106694.0 Thank you for the link. Helped me to find a solution to my dns settings on ios.
• T

  Remote VPN Ipsec Tunnel not reachable from mobile clients
  • trasher mx  

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  @trasher-mx Then you need to show / check the phase 2 settings on both sides of the tunnel and show/check the rules on the openvpn interface Or using tcpdump to find the place where the packets are blocked
• M

  IPsec Phase 2 entry for access to WAN interface?
  • marama  

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  @marama So, you can try to use Policy NAT with some pseudo net which translates to 192.168.0.0/24 of WAN (10.0.0.0/24 in example): Port Forward with source field: or 1:1 NAT with destination field
• N

  Can I route internet traffic from site B through site A via Ipsec VTI?
  • ngoehring123  

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  https://forum.netgate.com/post/862316
• B

  IPSEC + VTI + IKEV2 - will not auto-reconnect
  • bbrendon  

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  @Derelict Well, VTI is routed, so I'm not sure what you mean by source address. Would the traffic have to be coming from the numbered VTI interface? Maybe I need to setup a cron job to ping from the VTI interface on the pfsense itself? These are the logs from the two sides (links below). I'm not sure what is relevant so I posted the whole thing. The internet connection was down at the manuf site from 11:40 to 12:01. After 12:01 I wasn't able to get the VPN to reconnect by itself. office: https://pastebin.com/2vqEF2Fp manuf: https://pastebin.com/jHXpAiwt
• M

  How to setup mobile connections for plain ipsec and l2tp at the same time.
  • mooncaptain  

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• M

  Mobile Device connects but can't connect to host - can ping host from pfsense web config
  • mooncaptain  

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  AWS config problem - I reinsntalled pfsense on AWS carefully following instructions and resolved most of the issues. Still had to tweak the elastic IP assignment to get the LAN assignment to be available in pfsense. The instructions seem to indicate that the elastic ip should be assigned to an interface in AWS but when I changed it to be assigned to the pfsense instance then the ip showed up as a network interface in pFsense.
• T

  IPSEC with outbound NAT + 1:1 NAT
  • Tiski  

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  Few complements (i haven't have solved the issue) I see the following states vtnet4 icmp 10.45.226.1:15026 (172.20.74.31:47548) -> 10.45.226.3:15026 0:0 enc0 icmp 10.45.226.3:47548 (10.100.45.2:47548) <- 172.20.74.31:47548 0:0 where enc0 is ipsec i assume and vtnet4 is the LAN interface. This issue is driving me mad, i can provide schemes, and answer to anyone willing to help.
• 

  IPsec Stop working after few commands
  • kiokoman  

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  Either the states are being removed or you have some asymmetric routing happening that is cutting off the connection after the half-open state times out.
• Q

  multiple connection l2TP behind a NAT
  • qsdfg  

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  IPsec Site-to-Site with NAT
  • jf5264835  

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  Well, doesn't matter now, I got it properly working using OpenVPN, took all of an hour including coffee time, vs IPsec which has been weeks in the making. Thank you for steering me into the light @Derelict
• G

  IKEv2 VPN for Windows 10 and OSX - HOW-TO!
  • gbitglenn  

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  Actually I was focusing on that cause I didn't see this in the OSX successful connection, but there also: 24 22:12:29 charon 08[CFG] <2> looking for peer configs matching 192.x.x.x[%any]....x.x.x.x.[172.16xx.x] Aug 24 22:12:29 charon 08[CFG] <2> candidate "bypasslan", match: 1/1/24 (me/other/ike) Aug 24 22:12:29 charon 08[CFG] <2> candidate "con-mobile", match: 1/1/1052 (me/other/ike) Aug 24 22:12:29 charon 08[CFG] <2> ignore candidate 'con-mobile' without matching IKE proposal Aug 24 22:12:29 charon 08[CFG] <bypasslan|2> selected peer config 'bypasslan' Aug 24 22:12:29 charon 08[IKE] <bypasslan|2> peer requested EAP, config unacceptable Aug 24 22:12:29 charon 08[CFG] <bypasslan|2> no alternative config found
• C

  IPSec tunnels going down sometimes when phase 2 renegotiation happens.
  • careymichael  

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  Well you should have everything at p3 anyway. I'm not aware of any particular issue between p2 and p3 though. Do you have any logs showing the negotiation failure from either end? Steve
• D

  ipsec mobile with 2f Google Authenticator
  • digitalcomposer  

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  You might get that to work with an IKEv1 Xauth style setup. It definitely will not work with IKEv2 EAP, though because EAP won't work with PAP.
• G

  IPsec advanced settings MSS clamping vs IPsec interface MSS clamping
  • girtsd  

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  @Konstanti Thank you! That clears it up! I will be using the settings on the IPsec interface tab.
• S

  IPSEC only works for 30 seconds after connecting or works for 5 days if you REBOOT
  • syndicate604  

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• O

  IPSec/VTI/BGP: MSS clamping on VPN traffic
  • oyermolenko  

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  nowadays just keep disabled P2 with needed nets for scrubbing.