Can anyone explain this behaviour and if this is a bug or a poor design decision? Sophos Connect automatically downloads the new policy and reestablishes the SSL VPN tunnel. The Sophos Connect policy isn't defined or activated on the firewall. This is possibly an MR4+ issue but we encountered this after upgrading to MR 5. SURF detected one or more of the following log lines below in the awarrenhttp log file of the SFOS appliance. abc This issue may occur if theres a mismatched local and remote connection ID configured, Problem #4 -Traffic does not pass through the IPsec VPN Tunnel, Sophos Firewall: Troubleshooting steps when traffic is not passing through the VPN tunnel, Problem #5 Invalid HASH_V1 payload length, decryption failed? Well put strongswan service in debugging while we troubleshoot IPsec VPN issues. Contact Sophos Support if the website is not accessible. Please copy it manually. The purpose of this post is to help understand troubleshooting steps and explain how to fix the most common IPsec issues that can be encountered while using the Sophos Firewall IPsec VPN(site to site) feature. The troubleshooting steps below are for Windows only. The Sophos Connect service (scvpn) is not running. Verify if firewall rules are created to allow VPN traffic. This error applies to SSL VPN connections only. & Parsed IKE_AUTH response1[ N(AUTH_FAILED) ]. If you have issues connecting to your remote network, click the events tab, find the timestamp from when you attempted a connection, and find the relevant error. Make sure the preshared key matches in the VPN configuration on both firewalls. Note: Proxy ID for other firewall vendors may be referred to as the Access List or Access Control List (ACL). The network adapter (ethernet or Wi-Fi) has no IP address. To prevent the prompt from showing in the future, contact your firewall administrator. __________________________________________________________________________________________________________________. I can configure the default profile on the XG to tunnel everything (use as default gateway) and then my individual split profiles still work as they should. Find answers to your questions by entering keywords or phrases in the Search bar above. If you don't have access to the firewall or router, for example, if you're in a hotel, connect through your mobile hotspot and try to connect again. If you don't have a network connection, follow these instructions. PDF Configuration Guide SOPHOS XG Firewall - TheGreenBow Cause: The remote firewall couldn't authenticate the local request because the ID types don't match. Override hostname is configured, but it does not resolve to a valid or correct public IP address. The WAN address on the remote gateway isn't connected directly to the internet. Phase 2 fail, IPSec policy invalidated proposal with error 32 Overview . That worked for me. Sophos Firewall: Status Code 502 Invalid headers in response Set the phase 2 key life lower than the phase 1 value in both firewalls. Check your local firewall or router configuration and allow traffic on those ports. Sophos Connect then downloads the new policy to re-establish the tunnel. Make sure the VPN configuration on both firewalls has the same settings for the following: Phase 1: Encryption, authentication, and DH group. IPSec VPN Error: IKE Phase-2 Negotiation is Failed as Initiator, Quick Mode I had not configured the Advanced settings as it didn't exist prior to MR4. Enter the following command: ip xfrm state. To prevent key exchange collisions, follow these guidelines: Sophos Firewall only supports time-based rekeying. You've either taken a step backwards or closeda function you didn't realise people were using. IPsec connection is established between a Sophos Firewall device and a third-party firewall. Table of Contents Problem #1 - Incorrect traffic selectors (SA) Verify networks being presented by both local and remote ends match DDNS is configured, but it does not resolve to the correct or valid public IP address. 09-02-2014 Failed SA: 216.204.241.93[500]-216.203.80.108[500] message id:0x43D098BB. You can also match keywords within the logs by entering. If the firewall administrator changes the SSL VPN policy on Sophos Firewall while the tunnel is in a connected state, if it's an SSL VPN over TCP tunnel, the Sophos Connect client detects and downloads the new policy immediately. Thegrepcommandapplies a search filter for the keyword within the logs. IPsec authentication fails during phase 1 setup. You can see that the SA (Security Association) isn't shown. The client isn't able to resolve the gateway hostname. The remote ID has to match the configured ID or phase 1 will not come up, and thus the IPsec VPN wont work. Thank you for the feedback. The most common phase-2 failure is due to Proxy ID mismatch. Applies to the following Sophos product(s) and version(s): Sophos Firewall 18.0, 17.5, 17.0 . Sophos Firewall: Website inaccessible due to 502 status code - invalid header in response KB-000041466 May 31, 2021 0 people found this article helpful. Proceed to the next steps if the website is accessible. Solved: vpn phase 2 error - IPSEC(ipsec_process_proposal): invalid The purpose of this post is to help understand troubleshooting steps and explain how to fix the most common IPsec issues that can be encountered while using the Sophos Firewall IPsec VPN (site to site) feature. The gateway isn't responding to IKE negotiation messages. If the connection was added using a provisioning file, verify the hostname provided. Your browser doesnt support copying the link to the clipboard. This issue may occur if the networks being negotiated on either end of the tunnels dont match on both ends. 2020-11-13 13:56:39 12[ENC] <5> could not decrypt payloads, 2020-11-13 13:56:39 12[IKE] <5> message parsing failed, 2020-11-13 13:56:39 12[ENC] <5> generating INFORMATIONAL_V1 request 2070455846 [ HASH N(PLD_MAL) ], 2020-11-13 13:56:39 12[NET] <5> sending packet: from 10.0.0.4[500] to 72.138.xxx.xxx[500] (124 bytes), 2020-11-13 13:56:39 12[IKE] <5> ID_PROT request with message ID 0 processing failed, 2020-11-13 13:56:39 04[NET] sending packet: from 10.0.0.4[500] to 72.138.xxx.xxx[500], 2020-11-13 13:56:39 12[DMN] <5> [GARNER-LOGGING] (child_alert) ALERT: parsing IKE message from 72.138.xxx.xxx[4500] failed, 2020-11-03 04:17:03 03[NET] received packet: from 40.75.xxx.xxx[4500] to 192.168.1.16[4500] (96 bytes), 2020-11-03 04:17:03 03[ENC] parsed IKE_AUTH response 1 [ N(AUTH_FAILED) ], 2020-11-03 04:17:03 03[IKE] received AUTHENTICATION_FAILED notify error, 2020-11-03 04:17:03 03[DMN] [GARNER-LOGGING] (child_alert) ALERT: creating local authentication data failed, 2020-11-03 04:17:03 03[IKE] IKE_SA AUTHENTICATION_FAILED set_condition COND_START_OVER, 2020-11-03 04:17:03 03[IKE] IKE_SA has_condition COND_START_OVER retry initiate in 60 sec, 2020-11-03 04:17:03 03[CHD] CHILD_SA To_Azure_Sophos-1{191} state change: CREATED => DESTROYING, 2020-11-03 04:17:03 03[IKE] IKE_SA To_Azure_Sophos-1[123] state change: CONNECTING => DESTROYING, 2020-11-03 13:18:07 21[NET] <136> received packet: from 72.138.xxx.xxx[4500] to 10.0.0.4[4500] (464 bytes), 2020-11-03 13:18:07 21[ENC] <136> parsed IKE_AUTH request 1 [ IDi IDr AUTH SA TSi TSr N(MULT_AUTH) N(EAP_ONLY) N(MSG_ID_SYN_SUP) ], 2020-11-03 13:18:07 21[CFG] <136> looking for peer configs matching 10.0.0.4[10.0.0.4]72.138.xxx.xxx[72.138.xxx.xxx], 2020-11-03 13:18:07 21[CFG] <136> candidate "Azure_to_Sophos-1", match: 20/20/1052 (me/other/ike), 2020-11-03 13:18:07 21[CFG] selected peer config 'Azure_to_Sophos-1', 2020-11-03 13:18:07 21[IKE] tried 2 shared keys for '10.0.0.4' - '72.138.xxx.xxx', but MAC mismatched, 2020-11-03 13:18:07 21[DMN] [GARNER-LOGGING] (child_alert) ALERT: peer authentication failed, 2020-11-03 13:18:07 21[ENC] generating IKE_AUTH response 1 [ N(AUTH_FAILED) ], 2020-11-03 13:18:07 21[NET] sending packet: from 10.0.0.4[4500] to 72.138.xxx.xxx[4500] (96 bytes), 2020-11-03 13:18:07 21[IKE] IKE_SA Azure_to_Sophos-1[136] state change: CONNECTING => DESTROYING. A look at the ikemgr.log with the CLI command: ( description contains 'IKE protocol notification message received: INVALID-ID-INFORMATION (18).' 2020-09-20 00:25:13 05[DMN] [GARNER-LOGGING] (child_alert) ALERT: the received traffic selectors did not match: 172.16.19.0/24 === 10.0.1.0/24 << Local and remote network did not match. The output shows that IPSec SAs have been established. The connection imported from a provisioning file has a duplicate display name. Help us improve this page by. If it doesn't resolve, contact your ISP. After much stuffing around and spotting a clue in the MR4 release notes, we figured out we had to have the Use as default gateway turned on in the GUI and then all the clients could connect. 2020-09-20 00:29:42 22[NET] <10> received packet: from 72.138.xx.xx[4500] to 10.0.0.4[4500] (464 bytes), 2020-09-20 00:29:42 22[ENC] <10> parsed IKE_AUTH request 1 [ IDi IDr AUTH SA TSi TSr N(MULT_AUTH) N(EAP_ONLY) N(MSG_ID_SYN_SUP) ], 2020-09-20 00:29:42 22[CFG] <10> looking for peer configs matching 10.0.0.4[10.0.0.1]72.138.xx.xx[72.138.xx.xx], 2020-09-20 00:29:42 22[CFG] <10> no matching peer config found, 2020-09-20 00:29:42 22[DMN] <10> [GARNER-LOGGING] (child_alert) ALERT: peer authentication failed, 2020-09-20 00:29:42 22[ENC] <10> generating IKE_AUTH response 1 [ N(AUTH_FAILED) ], 2020-09-20 00:29:42 22[NET] <10> sending packet: from 10.0.0.4[4500] to 72.138.xx.xx[4500] (96 bytes), 2020-09-20 00:29:42 22[IKE] <10> IKE_SA (unnamed)[10] state change: CONNECTING => DESTROYING, 2020-09-20 00:29:42 04[NET] sending packet: from 10.0.0.4[4500] to xx.xx[4500], SFVUNL_AI01_SFOS 19.0.1 MR-1-Build365# ipsec statusall. Check that you have a valid IP address and that your existing network connection is working. 2020-09-20 00:25:13 05[IKE] failed to establish CHILD_SA, keeping IKE_SA, Logs on remote(respond only) Sophos firewall, 2020-09-24 18:51:19 13[NET] <100> received packet: from 72.138.xx.xx1[500] to 10.0.0.4[500] (872 bytes), 2020-09-24 18:51:19 13[ENC] <100> parsed ID_PROT request 0 [ SA V V V V V V ], 2020-09-24 18:51:19 13[CFG] <100> looking for an ike config for 10.0.0.472.138.xx.xx, 2020-09-24 18:51:19 13[IKE] <100> no IKE config found for 10.0.0.472.138.xx.xx, sending NO_PROPOSAL_CHOSEN, 2020-09-24 18:51:19 13[ENC] <100> generating INFORMATIONAL_V1 request 1316998708 [ N(NO_PROP) ], 2020-09-24 18:51:19 13[NET] <100> sending packet: from 10.0.0.4[500] to 72.138.107.211[500] (40 bytes), 2020-09-24 18:51:19 13[IKE] <100> IKE_SA (unnamed)[100] state change: CREATED => DESTROYING, 2020-09-24 09:50:54 06[NET] received packet: from 40.84.xx.xx [500] to 192.168.1.16[500] (40 bytes), 2020-09-24 09:50:54 06[ENC] parsed INFORMATIONAL_V1 request 1316998708 [ N(NO_PROP) ], 2020-09-24 09:50:54 06[IKE] informational: received NO_PROPOSAL_CHOSEN error notify, 2020-09-24 09:50:54 06[IKE] IKE_SA NO_PROPOSAL_CHOSEN set_condition COND_START_OVER, 2020-09-24 09:50:54 06[IKE] flush_queue(IKE_MOBIKE), 2020-09-24 09:50:54 06[IKE] ### destroy: 0x7f9b88001f80, 2020-09-24 09:50:54 06[IKE] flush_queue(IKE_NATD), 2020-09-24 09:50:54 06[IKE] flush_queue(IKE_INIT), 2020-09-24 09:50:54 06[IKE] IKE_SA has_condition COND_START_OVER retry initiate in 60 sec, 2020-09-24 09:50:54 06[IKE] IKE_SA To_Azure_Sophos-1[108] state change: CONNECTING => DESTROYING. Allowed users and groups and you can't do it in the GUI (from the VPN area) unless the Advanced settings area is configured. Help us improve this page by, Comparing policy-based and route-based VPNs, Remote peer reports no match on the acceptable proposals, Tunnel established but traffic stops later. During the phase 2 negotiation, the local and remote subnets specified on the firewalls didn't match. Cause: Mismatched phase 1 proposals between the two peers. If the connection was added by importing an Open VPN (. Resolution. The output shows the transform sets for the VPN exist, that is, the SAs match. Pricing for Sophos Home Premium is $59.99 (MSRP) for up to 10 PC and Mac devices; pricing may vary based on seasonal promotions All existing Sophos Home Free accounts (that switched to Free before November 11th 2021), worldwide will retain their Sophos Home Free license with all of the existing features, including protection for up to three PC . If the preshared key matches, verify with the ISP or on the upstream devices if they've corrupted the packet. 04:12 PM Contact your firewall administrator if you need further help. Possible reasons for the failure are as follows: Thank you for your feedback. The possible causes are as follows: The remote gateway responded to IKE negotiations from Sophos Connect with this error notification. If you need further assistance, contact Sophos Support. Open the command prompt as an administrator and enter the following commands: If the connection is configured with a provisioning file, Sophos Connect automatically tries to reconnect. Disclaimer: This information is provided as-is for the benefit of the Community. Phase 1 is up \ Initiating establishment of Phase 2 SA \ Remote peer reports no match on the acceptable proposals The remote firewall shows the following error message: NO_PROPOSAL_CHOSEN Cause: Mismatched phase 2 proposal. As I had to configure the Advanced settings area in MR5 (let's call it the default profile) to just save the screen, then things stopped working. Security Associations (1 up, 0 connecting): To_Azure_Sophos-1[11]: ESTABLISHED 6 minutes ago, 192.168.1.16[72.138.xx.xx]52.179.xx.xx[10.0.0.4], To_Azure_Sophos-1[11]: IKEv2 SPIs: de12479abd022538_i* e9aa15057931f8d2_r, rekeying in 77 minutes, To_Azure_Sophos-1[11]: IKE proposal: AES_CBC_256/HMAC_SHA2_512_256/PRF_HMAC_SHA2_512/CURVE_25519, To_Azure_Sophos-1{11}: INSTALLED, TUNNEL, reqid 6, ESP in UDP SPIs: c2a06117_i ce6446d0_o, To_Azure_Sophos-1{11}: AES_CBC_256/HMAC_SHA2_512_256, 0 bytes_i, 0 bytes_o, rekeying in 14 minutes, To_Azure_Sophos-1{11}: 172.16.19.0/24 === 10.0.1.0/24, SFVUNL_AI01_SFOS 19.0.1 MR-1-Build365# ip route show table 220, 10.0.1.0/24 dev ipsec0 scope link src 172.16.19.16, 2020-11-13 04:55:06 17[NET] received packet: from 20.36.xxx.xxx[500] to 192.168.1.16[500] (124 bytes). Common configuration errors that prevent Sophos Firewall devices from establishing site-to-site IPsec VPN connections. They must choose one of the options below: You canceled the certificate warning prompt, and the connection was terminated. In this case, contact your firewall administrator. The message no matching peer config found indicated that the connection ID wasnt configured to match on both sites. On Sophos Firewall, import the certificate, and then select it for. Due to negotiation timeout. The firewall administrator changed the SSL VPN settings on Sophos Firewall after an SSL VPN connection was established and saved by Sophos Connect. If you configured traffic-based rekeying on the third-party remote firewall, change it to time-based rekeying. Phase 1 succeeds, but Phase 2 negotiation fails. 1997 - 2023 Sophos Ltd. All rights reserved. In the following topics, you can see error messages, possible causes for the errors, and information on what to do next. If you experience any issues that aren't listed, see General troubleshooting. This could be due to any of the following reasons: If DNS resolution is failing for the gateway, follow these instructions. The firewall or the router is blocking UDP ports 500 and 4500. Verify the network objects on either end match exactly down to the correct subnets and even individual addresses. Traffic stops flowing after some time. This may be because the firewall administrator changed the local ID on the firewall, and the new configuration file wasn't imported to Sophos Connect. XG firewall supports only one profile as of today, if you go down the road with the XG config with split tunneling. The Sophos Connect client tried to establish an SSL VPN connection with an existing policy it has saved for this connection. 2020-11-13 04:55:06 17[ENC] invalid HASH_V1 payload length, decryption failed? Issue a new certificate for Sophos Firewall signed by a public CA. Please contact Sophos Professional Services if you require assistance with your specific environment. Sophos XG Firewall: Mails failed to deliver due to retry time not reached for any . Is it on the official roadmap to properly support multiple IPSEC profiles? The Sophos Connect client imports the SSL VPN configuration by connecting to the Sophos Firewall user portal using the provisioning file's properties. If the subnets match, the remote administrator must check the remote firewall's logs if the error persists. 2020-09-20 00:25:13 05[NET] received packet: from 72.138.xx.xx[4500] to 10.0.0.4[4500] (1168 bytes), 2020-09-20 00:25:13 05[ENC] parsed CREATE_CHILD_SA request 2 [ SA No KE TSi TSr ], 2020-09-20 00:25:13 05[CFG] looking for a child config for 10.0.1.0/24 === 172.16.19.0/24, 2020-09-20 00:25:13 05[IKE] traffic selectors 10.0.1.0/24 === 172.16.19.0/24 inacceptable. Sophos Connect IPSEC tunnel fails with MR5 unless Use as default Thank you for your feedback. 02-21-2020 The policy gateway is unreachable because it's turned off. The connection was created using a provisioning file. Steps to put the strongswan service in debug: SSH into the Sophos firewall by following this KBA: To connect using SSH, you may use any SSH client to connect to port 22 of the SFOS device. If the firewall administrator changes the SSL VPN policy on Sophos Firewall while the tunnel is in a connected state, and it's an SSL VPN over TCP tunnel, then the Sophos Connect client detects and disconnects the tunnel with an error.
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