Authenticate/Decrypt packet error: packet HMAC authentication failed

Our UTM release is 9.707-5

Hallo Christian and welcome to the UTM Community!

Please show us the lines from the UTM's SSL VPN log for the time when the authentication failure occurred.

Cheers - Bob

Hi Bob,

sorry the wrong log file now the right log file. You'll find the Authenticate/Decrypt packet error in bold characters below.

Best Regards,

Christian 

Mon Sep 13 07:59:40 2021 OpenVPN 2.3.8 i686-w64-mingw32 [SSL (OpenSSL)] [LZO] [IPv6] built on Oct 30 2018
Mon Sep 13 07:59:40 2021 library versions: OpenSSL 1.0.2l 25 May 2017, LZO 2.09
Mon Sep 13 07:59:40 2021 MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:25340
Mon Sep 13 07:59:40 2021 Need hold release from management interface, waiting...
Mon Sep 13 07:59:41 2021 MANAGEMENT: Client connected from [AF_INET]127.0.0.1:25340
Mon Sep 13 07:59:41 2021 MANAGEMENT: CMD 'state on'
Mon Sep 13 07:59:41 2021 MANAGEMENT: CMD 'log all on'
Mon Sep 13 07:59:41 2021 MANAGEMENT: CMD 'hold off'
Mon Sep 13 07:59:41 2021 MANAGEMENT: CMD 'hold release'
Mon Sep 13 08:00:12 2021 MANAGEMENT: CMD 'username "Auth" "c.modrok"'
Mon Sep 13 08:00:12 2021 MANAGEMENT: CMD 'password [...]'
Mon Sep 13 08:00:13 2021 Socket Buffers: R=[65536->65536] S=[65536->65536]
Mon Sep 13 08:00:13 2021 MANAGEMENT: >STATE:1631512813,RESOLVE,,,,,,
Mon Sep 13 08:00:13 2021 Attempting to establish TCP connection with [AF_INET]62.72.104.227:443 [nonblock]
Mon Sep 13 08:00:13 2021 MANAGEMENT: >STATE:1631512813,TCP_CONNECT,,,,,,
Mon Sep 13 08:00:14 2021 TCP connection established with [AF_INET]62.72.104.227:443
Mon Sep 13 08:00:14 2021 TCPv4_CLIENT link local: [undef]
Mon Sep 13 08:00:14 2021 TCPv4_CLIENT link remote: [AF_INET]62.72.104.227:443
Mon Sep 13 08:00:14 2021 MANAGEMENT: >STATE:1631512814,WAIT,,,,,,
Mon Sep 13 08:00:14 2021 MANAGEMENT: >STATE:1631512814,AUTH,,,,,,
Mon Sep 13 08:00:14 2021 TLS: Initial packet from [AF_INET]62.72.104.227:443, sid=93e813b4 38df2d27
Mon Sep 13 08:00:14 2021 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Mon Sep 13 08:00:14 2021 VERIFY OK: depth=1, C=lu, L=Munsbach, O=Ethenea, CN=Ethenea VPN CA, emailAddress=licadmin@ethenea.com
Mon Sep 13 08:00:14 2021 VERIFY X509NAME OK: C=lu, L=Munsbach, O=Ethenea, CN=FW-LU-01, emailAddress=licadmin@ethenea.com
Mon Sep 13 08:00:14 2021 VERIFY OK: depth=0, C=lu, L=Munsbach, O=Ethenea, CN=FW-LU-01, emailAddress=licadmin@ethenea.com
Mon Sep 13 08:00:15 2021 Data Channel Encrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Mon Sep 13 08:00:15 2021 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Sep 13 08:00:15 2021 Data Channel Decrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Mon Sep 13 08:00:15 2021 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Sep 13 08:00:15 2021 Control Channel: TLSv1.2, cipher TLSv1/SSLv3 DHE-RSA-AES256-GCM-SHA384, 2048 bit RSA
Mon Sep 13 08:00:15 2021 [FW-LU-01] Peer Connection Initiated with [AF_INET]62.72.104.227:443
Mon Sep 13 08:00:16 2021 MANAGEMENT: >STATE:1631512816,GET_CONFIG,,,,,,
Mon Sep 13 08:00:18 2021 SENT CONTROL [FW-LU-01]: 'PUSH_REQUEST' (status=1)
Mon Sep 13 08:00:18 2021 PUSH: Received control message: 'PUSH_REPLY,route-gateway 10.242.2.1,route-gateway 10.242.2.1,topology subnet,ping 10,ping-restart 120,route 192.168.102.0 255.255.255.0,route 192.168.12.0 255.255.255.0,route 192.168.101.0 255.255.255.0,route 192.168.103.0 255.255.255.0,route 192.168.104.0 255.255.255.0,route 192.168.105.0 255.255.255.0,route 192.168.10.0 255.255.255.0,route 192.168.11.0 255.255.255.0,route 172.16.80.0 255.255.255.0,route 192.168.70.0 255.255.255.0,route 192.168.71.0 255.255.255.0,route 192.168.72.0 255.255.255.0,route 192.168.13.0 255.255.255.0,dhcp-option DNS 192.168.12.34,dhcp-option DNS 192.168.12.32,dhcp-option DOMAIN ethna-capital.local,ifconfig 10.242.2.22 255.255.255.0'
Mon Sep 13 08:00:18 2021 OPTIONS IMPORT: timers and/or timeouts modified
Mon Sep 13 08:00:18 2021 OPTIONS IMPORT: --ifconfig/up options modified
Mon Sep 13 08:00:18 2021 OPTIONS IMPORT: route options modified
Mon Sep 13 08:00:18 2021 OPTIONS IMPORT: route-related options modified
Mon Sep 13 08:00:18 2021 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Mon Sep 13 08:00:18 2021 ROUTE_GATEWAY 192.168.178.1/255.255.255.0 I=5 HWADDR=70:5a:0f:46:7b:f6
Mon Sep 13 08:00:18 2021 open_tun, tt->ipv6=0
Mon Sep 13 08:00:18 2021 TAP-WIN32 device [Ethernet 3] opened: \\.\Global\{D2F18D38-D917-4E49-A9FB-27B6015721FA}.tap
Mon Sep 13 08:00:18 2021 TAP-Windows Driver Version 9.21
Mon Sep 13 08:00:18 2021 Set TAP-Windows TUN subnet mode network/local/netmask = 10.242.2.0/10.242.2.22/255.255.255.0 [SUCCEEDED]
Mon Sep 13 08:00:18 2021 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.242.2.22/255.255.255.0 on interface {D2F18D38-D917-4E49-A9FB-27B6015721FA} [DHCP-serv: 10.242.2.254, lease-time: 31536000]
Mon Sep 13 08:00:18 2021 Successful ARP Flush on interface [11] {D2F18D38-D917-4E49-A9FB-27B6015721FA}
Mon Sep 13 08:00:18 2021 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Mon Sep 13 08:00:18 2021 MANAGEMENT: >STATE:1631512818,ASSIGN_IP,,10.242.2.22,,,,
Mon Sep 13 08:00:22 2021 TEST ROUTES: 14/14 succeeded len=14 ret=1 a=0 u/d=up
Mon Sep 13 08:00:22 2021 MANAGEMENT: >STATE:1631512822,ADD_ROUTES,,,,,,
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 62.72.104.227 MASK 255.255.255.255 192.168.178.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.102.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.12.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.101.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.103.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.104.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.105.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.10.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.11.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 172.16.80.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.70.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.71.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.72.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 C:\WINDOWS\system32\route.exe ADD 192.168.13.0 MASK 255.255.255.0 10.242.2.1
Mon Sep 13 08:00:22 2021 Route addition via service succeeded
Mon Sep 13 08:00:22 2021 Initialization Sequence Completed
Mon Sep 13 08:00:22 2021 MANAGEMENT: >STATE:1631512822,CONNECTED,SUCCESS,10.242.2.22,62.72.104.227,443,192.168.178.40,50406

Mon Sep 13 08:33:02 2021 Authenticate/Decrypt packet error: packet HMAC authentication failed
Mon Sep 13 08:33:02 2021 Fatal decryption error (process_incoming_link), restarting

Mon Sep 13 08:33:02 2021 SIGUSR1[soft,decryption-error] received, process restarting
Mon Sep 13 08:33:02 2021 MANAGEMENT: >STATE:1631514782,RECONNECTING,decryption-error,,,,,
Mon Sep 13 08:33:02 2021 Restart pause, 5 second(s)
Mon Sep 13 08:33:07 2021 Socket Buffers: R=[65536->65536] S=[65536->65536]
Mon Sep 13 08:33:07 2021 MANAGEMENT: >STATE:1631514787,RESOLVE,,,,,,
Mon Sep 13 08:33:07 2021 Attempting to establish TCP connection with [AF_INET]62.72.104.227:443 [nonblock]
Mon Sep 13 08:33:07 2021 MANAGEMENT: >STATE:1631514787,TCP_CONNECT,,,,,,
Mon Sep 13 08:33:11 2021 TCP connection established with [AF_INET]62.72.104.227:443
Mon Sep 13 08:33:11 2021 TCPv4_CLIENT link local: [undef]
Mon Sep 13 08:33:11 2021 TCPv4_CLIENT link remote: [AF_INET]62.72.104.227:443
Mon Sep 13 08:33:11 2021 MANAGEMENT: >STATE:1631514791,WAIT,,,,,,
Mon Sep 13 08:33:11 2021 MANAGEMENT: >STATE:1631514791,AUTH,,,,,,
Mon Sep 13 08:33:11 2021 TLS: Initial packet from [AF_INET]62.72.104.227:443, sid=07ddf319 08cfbc0e
Mon Sep 13 08:33:11 2021 VERIFY OK: depth=1, C=lu, L=Munsbach, O=Ethenea, CN=Ethenea VPN CA, emailAddress=licadmin@ethenea.com
Mon Sep 13 08:33:11 2021 VERIFY X509NAME OK: C=lu, L=Munsbach, O=Ethenea, CN=FW-LU-01, emailAddress=licadmin@ethenea.com
Mon Sep 13 08:33:11 2021 VERIFY OK: depth=0, C=lu, L=Munsbach, O=Ethenea, CN=FW-LU-01, emailAddress=licadmin@ethenea.com
Mon Sep 13 08:33:13 2021 Data Channel Encrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Mon Sep 13 08:33:13 2021 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Sep 13 08:33:13 2021 Data Channel Decrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Mon Sep 13 08:33:13 2021 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Sep 13 08:33:13 2021 Control Channel: TLSv1.2, cipher TLSv1/SSLv3 DHE-RSA-AES256-GCM-SHA384, 2048 bit RSA
Mon Sep 13 08:33:13 2021 [FW-LU-01] Peer Connection Initiated with [AF_INET]62.72.104.227:443
Mon Sep 13 08:33:14 2021 MANAGEMENT: >STATE:1631514794,GET_CONFIG,,,,,,
Mon Sep 13 08:33:15 2021 SENT CONTROL [FW-LU-01]: 'PUSH_REQUEST' (status=1)
Mon Sep 13 08:33:15 2021 AUTH: Received control message: AUTH_FAILED
Mon Sep 13 08:33:15 2021 SIGUSR1[soft,auth-failure] received, process restarting
Mon Sep 13 08:33:15 2021 MANAGEMENT: >STATE:1631514795,RECONNECTING,auth-failure,,,,,
Mon Sep 13 08:33:15 2021 Restart pause, 5 second(s)
Mon Sep 13 08:34:10 2021 MANAGEMENT: CMD 'username "Auth" "c.modrok"'
Mon Sep 13 08:34:10 2021 MANAGEMENT: CMD 'password [...]'
Mon Sep 13 08:34:10 2021 Socket Buffers: R=[65536->65536] S=[65536->65536]
Mon Sep 13 08:34:10 2021 MANAGEMENT: >STATE:1631514850,RESOLVE,,,,,,Mon Sep 13 08:34:10 2021 Attempting to establish TCP connection with [AF_INET]62.72.104.227:443 [nonblock]
Mon Sep 13 08:34:10 2021 MANAGEMENT: >STATE:1631514850,TCP_CONNECT,,,,,,Mon Sep 13 08:34:11 2021 TCP connection established with [AF_INET]62.72.104.227:443
Mon Sep 13 08:34:11 2021 TCPv4_CLIENT link local: [undef]
Mon Sep 13 08:34:11 2021 TCPv4_CLIENT link remote: [AF_INET]62.72.104.227:443
Mon Sep 13 08:34:11 2021 MANAGEMENT: >STATE:1631514851,WAIT,,,,,,
Mon Sep 13 08:34:11 2021 MANAGEMENT: >STATE:1631514851,AUTH,,,,,,
Mon Sep 13 08:34:11 2021 TLS: Initial packet from [AF_INET]62.72.104.227:443, sid=dd3862ba 15b0737e
Mon Sep 13 08:34:11 2021 VERIFY OK: depth=1, C=lu, L=Munsbach, O=Ethenea, CN=Ethenea VPN CA, emailAddress=licadmin@ethenea.com
Mon Sep 13 08:34:11 2021 VERIFY X509NAME OK: C=lu, L=Munsbach, O=Ethenea, CN=FW-LU-01, emailAddress=licadmin@ethenea.com
Mon Sep 13 08:34:11 2021 VERIFY OK: depth=0, C=lu, L=Munsbach, O=Ethenea, CN=FW-LU-01, emailAddress=licadmin@ethenea.com
Mon Sep 13 08:34:13 2021 Data Channel Encrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Mon Sep 13 08:34:13 2021 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Sep 13 08:34:13 2021 Data Channel Decrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Mon Sep 13 08:34:13 2021 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Sep 13 08:34:13 2021 Control Channel: TLSv1.2, cipher TLSv1/SSLv3 DHE-RSA-AES256-GCM-SHA384, 2048 bit RSA
Mon Sep 13 08:34:13 2021 [FW-LU-01] Peer Connection Initiated with [AF_INET]62.72.104.227:443
Mon Sep 13 08:34:14 2021 MANAGEMENT: >STATE:1631514854,GET_CONFIG,,,,,,
Mon Sep 13 08:34:15 2021 SENT CONTROL [FW-LU-01]: 'PUSH_REQUEST' (status=1)
Mon Sep 13 08:34:15 2021 PUSH: Received control message: 'PUSH_REPLY,route-gateway 10.242.2.1,route-gateway 10.242.2.1,topology subnet,ping 10,ping-restart 120,route 192.168.102.0 255.255.255.0,route 192.168.12.0 255.255.255.0,route 192.168.101.0 255.255.255.0,route 192.168.103.0 255.255.255.0,route 192.168.104.0 255.255.255.0,route 192.168.105.0 255.255.255.0,route 192.168.10.0 255.255.255.0,route 192.168.11.0 255.255.255.0,route 172.16.80.0 255.255.255.0,route 192.168.70.0 255.255.255.0,route 192.168.71.0 255.255.255.0,route 192.168.72.0 255.255.255.0,route 192.168.13.0 255.255.255.0,dhcp-option DNS 192.168.12.34,dhcp-option DNS 192.168.12.32,dhcp-option DOMAIN ethna-capital.local,ifconfig 10.242.2.22 255.255.255.0'
Mon Sep 13 08:34:15 2021 OPTIONS IMPORT: timers and/or timeouts modified
Mon Sep 13 08:34:15 2021 OPTIONS IMPORT: --ifconfig/up options modified
Mon Sep 13 08:34:15 2021 OPTIONS IMPORT: route options modified
Mon Sep 13 08:34:15 2021 OPTIONS IMPORT: route-related options modified
Mon Sep 13 08:34:15 2021 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Mon Sep 13 08:34:15 2021 Preserving previous TUN/TAP instance: Ethernet 3
Mon Sep 13 08:34:15 2021 Initialization Sequence Completed
Mon Sep 13 08:34:15 2021 MANAGEMENT: >STATE:1631514855,CONNECTED,SUCCESS,10.242.2.22,62.72.104.227,443,192.168.178.40,60029

Those are logs from the client, Christian.  Please show the log from the UTM for the corresponding time frame.  Also, a picture of the 'Advanced' tab in 'SSL VPN'.

Cheers - Bob

Motte said:

Mon Sep 13 08:33:02 2021 Authenticate/Decrypt packet error: packet HMAC authentication failed

This is usually when the client and server aren't sharing the same cipher authentications.  They need to match, i.e. 

cipher AES-256-CBC

The ciphers have to match on both sides.

Motte said:

Mon Sep 13 08:33:02 2021 Authenticate/Decrypt packet error: packet HMAC authentication failed

This is usually when the client and server aren't sharing the same cipher authentications.  They need to match, i.e. 

cipher AES-256-CBC

The ciphers have to match on both sides.