4. Issue Connecting pfsense as a client to OpenVPN Access Server

Issue Connecting pfsense as a client to OpenVPN Access Server

  • S

    Hi all,

    I have setup an OpenVPN Access Server on AWS using the AMI.
    I tried connecting to it via a normal windows client and it worked fine, but when I configured it through pfsense OpenVPN client (Auto login) it constantly shows the following status.

    ping restart; reconnecting or status : down

    When I tailed the logs on the Access server side than the following error was found in the logs.

    2019-02-04 09:15:51+0000 [-] OVPN 1 OUT: 'Mon Feb  4 09:15:51 2019 Authenticate/Decrypt packet error: packet HMAC authentication failed'
2019-02-04 09:15:51+0000 [-] OVPN 1 OUT: 'Mon Feb  4 09:15:51 2019 TLS Error: incoming packet authentication failed from [AF_INET]x.x.x.x:40511 (via [AF_INET]x.x.x.x%eth0)'
2019-02-04 09:15:59+0000 [-] OVPN 1 OUT: 'Mon Feb  4 09:15:59 2019 Authenticate/Decrypt packet error: packet HMAC authentication failed'
2019-02-04 09:15:59+0000 [-] OVPN 1 OUT: 'Mon Feb  4 09:15:59 2019 TLS Error: incoming packet authentication failed from [AF_INET]x.x.x.x:40511 (via [AF_INET]x.x.x.x%eth0)'
2019-02-04 09:16:15+0000 [-] OVPN 1 OUT: 'Mon Feb  4 09:16:15 2019 Authenticate/Decrypt packet error: packet HMAC authentication failed'
2019-02-04 09:16:15+0000 [-] OVPN 1 OUT: 'Mon Feb  4 09:16:15 2019 TLS Error: incoming packet authentication failed from [AF_INET]x.x.x.x:40511 (via [AF_INET]x.x.x.x%eth0)'

    Can someone please help me in this ?

    Thanks

    0
  • LAYER 8 Global Moderator

    Without showing what you did or didn't do when you set it up. Ho wae we suppose to help you.

    I have openvpn-as running on vps... Click Click to connect to it. Post up your config from your server and your client so we can see what your doing wrong.

    0
  • S

    @johnpoz

    here is the client configuration.

    dev ovpnc1
verb 1
dev-type tun
dev-node /dev/tun1
writepid /var/run/openvpn_client1.pid
#user nobody
#group nobody
script-security 3
daemon
keepalive 10 60
ping-timer-rem
persist-tun
persist-key
proto udp4
cipher AES-256-CBC
auth none
up /usr/local/sbin/ovpn-linkup
down /usr/local/sbin/ovpn-linkdown
local x.x.x.x
tls-client
client
lport 0
management /var/etc/openvpn/client1.sock unix
remote x.x.x.x 1194
ifconfig x.0.0.x x.0.0.x
route x.x.0.0 255.255.0.0
ca /var/etc/openvpn/client1.ca 
cert /var/etc/openvpn/client1.cert 
key /var/etc/openvpn/client1.key 
tls-crypt /var/etc/openvpn/client1.tls-crypt 
ncp-disable
comp-lzo no
passtos
resolv-retry infinite
topology subnet
key-direction 1
setenv opt tls-version-min 1.0 or highest
setenv FORWARD_COMPATIBLE 1
ns-cert-type server
setenv PUSH_PEER_INFO
    0
  • LAYER 8 Rebel Alliance

    And how about the Server configuration?

    -Rico

    0
  • S

    @Rico Is this what you are talking about ?
    As I am not able to find any other configuration files.

    #
# NOTE:  The ~ symbol used below expands to the directory that
# the configuration file is saved in

# remove for production
# DEBUG=false

# enable AS Connect functionality
AS_CONNECT=true

# temporary directory
tmp_dir=~/tmp

lic.dir=~/licenses

# run_start retries
run_start_retry.give_up=60
run_start_retry.resample=10

# enable client gateway
sa.show_c2s_routes=true

# certificates database
certs_db=sqlite:///~/db/certs.db

# user properties DB
user_prop_db=sqlite:///~/db/userprop.db

# configuration DB
config_db=sqlite:///~/db/config.db

# log DB
log_db=sqlite:///~/db/log.db

# wait this many seconds between failed retries
db_retry.interval=1

# how many retries to attempt before failing
db_retry.n_attempts=6

# On startup, wait up to n seconds for DB files to become
# available if they do not yet exist.  This is generally
# only useful on secondary nodes used for standby purposes.
# db_startup_wait=

# Node type: PRIMARY|SECONDARY.  Defaults to PRIMARY.
# node_type=

# bootstrap authentication via PAM -- allows
# admin to log into web UI before authentication
# system has been configured.  Configure PAM users
# allowed to access via the bootstrap auth mechanism.
boot_pam_service=openvpnas
boot_pam_users.0=openvpn
# boot_pam_users.1=
# boot_pam_users.2=
# boot_pam_users.3=
# boot_pam_users.4=

# System users that are allowed to access the server agent XML API.
# The user that the web server will run as should be in this list.
system_users_local.0=root
system_users_local.1=openvpn_as

# The user/group that the web server will run as
cs.user=openvpn_as
cs.group=openvpn_as

# socket directory
general.sock_dir=~/sock

# path to linux openvpn executable
# if undefined, find openvpn on the PATH
#general.openvpn_exe_path=

# source directory for OpenVPN Windows executable
# (Must have been built with MultiFileExtract)
sa.win_exe_dir=~/exe

# The company name will be shown in the UI
sa.company_name=OpenVPN, Inc.

# server agent socket
sa.sock=~/sock/sagent

# If enabled, automatically generate a client configuration
# when a client logs into the site and successfully authenticates
cs.auto_generate=true

# files for web server (PEM format)
cs.ca_bundle=~/web-ssl/ca.crt
cs.priv_key=~/web-ssl/server.key
cs.cert=~/web-ssl/server.crt

# web server will use three consecutive ports starting at this
# address, for use with the OpenVPN port share feature
cs.dynamic_port_base=870

# which service groups should be started during
# server agent initialization
sa.initial_run_groups.0=web_group
#sa.initial_run_groups.1=openvpn_group

# use this twisted reactor
sa.reactor=epoll

# The unit number of this particular AS configuration.
# Normally set to 0.  If you have multiple, independent AS instances
# running on the same machine, each should have a unique unit number.
sa.unit=0

# If true, open up web ports on the firewall using iptables
iptables.web=true

vpn.server.user=openvpn_as
vpn.server.group=openvpn_as```
    0
  • LAYER 8 Rebel Alliance

    Hmmm no idea what this is. ;-)
    However please try to switch TLS Encryption and Authentication to TLS Authentication in your pfSense Client.

    -Rico

    0
  • S

    @Rico Thanks a lot!! I was able to to connect after switching TLS Encryption and Authentication to TLS Authentication and than after that Added SHA1(160 bit)

    Now I am able to ping the AWS network from pfsense end but not able to ping the remote network (pfsense) side from the AWS end.

    I am not able to ping bidirectionally, Is this a normal behaviour in case of OpenVPN our some pfsense configuration needs to be done ?

    0
  • LAYER 8 Rebel Alliance

    You need to setup your Rules in the Firewall -> Rules -> OpenVPN tab (pfSense WebGUI).
    For testing just do any-any and check if everything works.

    -Rico

    0
  • LAYER 8 Global Moderator

    @shahid3507 said in Issue Connecting pfsense as a client to OpenVPN Access Server:

    tls-crypt /var/etc/openvpn/client1.tls-crypt

    I am like 99% sure that openvpn-as does not support tls-crypt.. Atleast not current 2.6.1 version..

    The AS stores its config in a db, so its a bit harder to show - but there is zero place to turn on crypt for tls in the gui. And do believe reading something about it - they did a while back enable crypt for the connect client (ios and android) but I do not believe the AS server supports it as of yet.

    When you setup the client in pfsense - did you download the client config from the AS to validate what you need to set?

    example - just download my client config from my AS

     Automatically generated OpenVPN client config file
# Generated on Mon Feb  4 07:15:51 2019 by ns1
# Note: this config file contains inline private keys
#       and therefore should be kept confidential!
# Note: this configuration is user-locked to the username below

    Certs will all be inline

    And its just doing auth

    key-direction 1
<tls-auth>
#
# 2048 bit OpenVPN static key (Server Agent)
#
-----BEGIN OpenVPN Static key V1-----
12303adb7486e4ef9d4dae4742741a22
10f785d43598499de66a7da89ee45221
<snipped>
235863ac6188180030d13ab6481e966c
a8bd1f1b1c08bd009430af58ab3e0b88
-----END OpenVPN Static key V1-----
</tls-auth>
    0
  • S

    @johnpoz I have just downloaded the config from AS and followed this document.
    https://www.netgate.com/docs/pfsense/vpn/openvpn/connecting-pfsense-to-an-openvpn-access-server.html

    0
  • LAYER 8 Global Moderator

    Seems you didn't follow the part where it says
    " pfSense may be configured to use the info in the .ovpn file"

    ☺

    0_1549286645395_validateyourauth.png

    And not encryption and auth. Double check all your other settings.

    example here is my client config form pfsense for my openvpn-as server

    dev ovpnc3
verb 1
dev-type tun
dev-node /dev/tun3
writepid /var/run/openvpn_client3.pid
#user nobody
#group nobody
script-security 3
daemon
keepalive 10 60
ping-timer-rem
persist-tun
persist-key
proto udp4
cipher AES-256-CBC
auth SHA256
up /usr/local/sbin/ovpn-linkup
down /usr/local/sbin/ovpn-linkdown
local 64.53.<snipped>
engine rdrand
tls-client
client
lport 0
management /var/etc/openvpn/client3.sock unix
remote <snipped> 1195
ca /var/etc/openvpn/client3.ca 
cert /var/etc/openvpn/client3.cert 
key /var/etc/openvpn/client3.key 
tls-auth /var/etc/openvpn/client3.tls-auth 1
ncp-ciphers AES-128-GCM:AES-192-GCM:AES-256-GCM:AES-128-CBC:AES-192-CBC:AES-256-CBC
comp-lzo no
resolv-retry infinite
route-nopull
fast-io
sndbuf 524288
rcvbuf 524288
[2.4.4-RELEASE][root@sg4860.local.lan]/var/etc/openvpn:

    notice
    tls-auth /var/etc/openvpn/client3.tls-auth 1

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  • S

    @johnpoz
    My bad, missed it.
    By the way do you know anything regarding Bidirectional ping part ?
    I have added any to any config in firewall for all interfaces still it dosen't work.

    Can you please help me in this on how to do it ?
    cc: @Rico

    0
  • LAYER 8 Global Moderator

    What are you trying to ping?

    0
  • S

    The tunnel is connecting and I am able to ping the AWS side (Access server subnet) but when I am trying to ping the client side form the access server or the subnet than it's not reachable.

    0
  • S

    Any Idea regarding this connectivity stuff @Rico ??

    0
  • LAYER 8 Rebel Alliance

    Not atm, I don't have any experience with OpenVPN AS or AWS, sorry. 😑
    But my guess is @johnpoz will come back with some ideas. 😀

    -Rico

    0
  • LAYER 8 Global Moderator

    Ping what exactly? Can you ping the lan IP of pfsense from your aws side?

    0
  • S

    No I can't @johnpoz

    0
  • LAYER 8 Global Moderator

    What is your routing on your aws side show you how to get to your lan network?

    0
  • S

    There was a need to add route for specific traffic and change the OpenVPN settings to act as site to site VPN.
    It is now working.

    Thanks for your help @johnpoz @Rico

    0
 

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