[+] VPN na VPS

[gambi]

Witam uruchomiłem sobie VPN-a na VPS-ie według tego poradnika:
https://zaufanatrzeciastrona.pl/post/tw ... erwer-vpn/
Wszystko zrobione według artykułu ale za nic nie mogę uzyskać połączenia z internetem przez VPN.
Klient openvpn na windowsie bezproblemowo łączy się i otrzymuję adres:

Kod: Zaznacz cały

10.8.0.1

Iptables w Centosie ( /etc/sysconfig/iptables ) wygląda tak:

Kod: Zaznacz cały

# Generated by iptables-save v1.4.21 on Mon Sep 19 12:26:52 2016
*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE
-A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE
COMMIT
# Completed on Mon Sep 19 12:26:52 2016

Ale połączenia z internetem niestety nie mogę uzyskać.....
Czy trzeba dodać jeszcze jakieś reguły przekierowujące w iptables?

[LordRuthwen]

A routing jakiś dla tej sieci masz?
Odpal tcpdumpa i zobacz czy ten komputer wogóle gada,

[liske1]

Zrobiłem przed chwilą na nowym serwerze i tam jest kilka małych błędów (robiłem to na debianie, nie na CentOS jak pisali). Po pierwsze nie działał tam plik dh dh2048.pem w konfiguracji, trzeba było zmienić z 1024 na 2048, po drugie sprawdź czy zmieniłeś DNS na te z google.

[gambi]

Zmiana na googlowe DNS-y nie pomogła.
Zastanawiam się jeszcze nad ip VPS, bo chyba jest ipv6 ?

Kod: Zaznacz cały

217.61.1.233

Może to mieć jakieś znaczenie?

[liske1]

217.61.1.233 to jest ipv4. Sprawdź jeszcze, czy dostawca usług nie blokuje Ci portu na VPN. Być może w "panelu admina", jest możliwość odblokowywania portów

[gambi]

Niestety nie ma tam możliwości odblokowania portów.

[liske1]

Pokaż jeszcze plik konfiguracyjny i logi serwera VPN.

[gambi]

Konfiguracja serwera:

Kod: Zaznacz cały

#################################################
# Sample OpenVPN 2.0 config file for            #
# multi-client server.                          #
#                                               #
# This file is for the server side              #
# of a many-clients <-> one-server              #
# OpenVPN configuration.                        #
#                                               #
# OpenVPN also supports                         #
# single-machine <-> single-machine             #
# configurations (See the Examples page         #
# on the web site for more info).               #
#                                               #
# This config should work on Windows            #
# or Linux/BSD systems.  Remember on            #
# Windows to quote pathnames and use            #
# double backslashes, e.g.:                     #
# "C:\\Program Files\\OpenVPN\\config\\foo.key" #
#                                               #
# Comments are preceded with '#' or ';'         #
#################################################

# Which local IP address should OpenVPN
# listen on? (optional)
;local a.b.c.d

# Which TCP/UDP port should OpenVPN listen on?
# If you want to run multiple OpenVPN instances
# on the same machine, use a different port
# number for each one.  You will need to
# open up this port on your firewall.
port 1194

# TCP or UDP server?
;proto tcp
proto udp

# "dev tun" will create a routed IP tunnel,
# "dev tap" will create an ethernet tunnel.
# Use "dev tap0" if you are ethernet bridging
# and have precreated a tap0 virtual interface
# and bridged it with your ethernet interface.
# If you want to control access policies
# over the VPN, you must create firewall
# rules for the the TUN/TAP interface.
# On non-Windows systems, you can give
# an explicit unit number, such as tun0.
# On Windows, use "dev-node" for this.
# On most systems, the VPN will not function
# unless you partially or fully disable
# the firewall for the TUN/TAP interface.
;dev tap
dev tun

# Windows needs the TAP-Win32 adapter name
# from the Network Connections panel if you
# have more than one.  On XP SP2 or higher,
# you may need to selectively disable the
# Windows firewall for the TAP adapter.
# Non-Windows systems usually don't need this.
;dev-node MyTap

# SSL/TLS root certificate (ca), certificate
# (cert), and private key (key).  Each client
# and the server must have their own cert and
# key file.  The server and all clients will
# use the same ca file.
#
# See the "easy-rsa" directory for a series
# of scripts for generating RSA certificates
# and private keys.  Remember to use
# a unique Common Name for the server
# and each of the client certificates.
#
# Any X509 key management system can be used.
# OpenVPN can also use a PKCS #12 formatted key file
# (see "pkcs12" directive in man page).
ca ca.crt
cert server.crt
key server.key  # This file should be kept secret

# Diffie hellman parameters.
# Generate your own with:
#   openssl dhparam -out dh2048.pem 2048
dh dh2048.pem

# Network topology
# Should be subnet (addressing via IP)
# unless Windows clients v2.0.9 and lower have to
# be supported (then net30, i.e. a /30 per client)
# Defaults to net30 (not recommended)
;topology subnet

# Configure server mode and supply a VPN subnet
# for OpenVPN to draw client addresses from.
# The server will take 10.8.0.1 for itself,
# the rest will be made available to clients.
# Each client will be able to reach the server
# on 10.8.0.1. Comment this line out if you are
# ethernet bridging. See the man page for more info.
server 10.8.0.0 255.255.255.0

# Maintain a record of client <-> virtual IP address
# associations in this file.  If OpenVPN goes down or
# is restarted, reconnecting clients can be assigned
# the same virtual IP address from the pool that was
# previously assigned.
ifconfig-pool-persist ipp.txt

# Configure server mode for ethernet bridging.
# You must first use your OS's bridging capability
# to bridge the TAP interface with the ethernet
# NIC interface.  Then you must manually set the
# IP/netmask on the bridge interface, here we
# assume 10.8.0.4/255.255.255.0.  Finally we
# must set aside an IP range in this subnet
# (start=10.8.0.50 end=10.8.0.100) to allocate
# to connecting clients.  Leave this line commented
# out unless you are ethernet bridging.
;server-bridge 10.8.0.4 255.255.255.0 10.8.0.50 10.8.0.100

# Configure server mode for ethernet bridging
# using a DHCP-proxy, where clients talk
# to the OpenVPN server-side DHCP server
# to receive their IP address allocation
# and DNS server addresses.  You must first use
# your OS's bridging capability to bridge the TAP
# interface with the ethernet NIC interface.
# Note: this mode only works on clients (such as
# Windows), where the client-side TAP adapter is
# bound to a DHCP client.
;server-bridge

# Push routes to the client to allow it
# to reach other private subnets behind
# the server.  Remember that these
# private subnets will also need
# to know to route the OpenVPN client
# address pool (10.8.0.0/255.255.255.0)
# back to the OpenVPN server.
;push "route 192.168.10.0 255.255.255.0"
;push "route 192.168.20.0 255.255.255.0"

# To assign specific IP addresses to specific
# clients or if a connecting client has a private
# subnet behind it that should also have VPN access,
# use the subdirectory "ccd" for client-specific
# configuration files (see man page for more info).

# EXAMPLE: Suppose the client
# having the certificate common name "Thelonious"
# also has a small subnet behind his connecting
# machine, such as 192.168.40.128/255.255.255.248.
# First, uncomment out these lines:
;client-config-dir ccd
;route 192.168.40.128 255.255.255.248
# Then create a file ccd/Thelonious with this line:
#   iroute 192.168.40.128 255.255.255.248
# This will allow Thelonious' private subnet to
# access the VPN.  This example will only work
# if you are routing, not bridging, i.e. you are
# using "dev tun" and "server" directives.

# EXAMPLE: Suppose you want to give
# Thelonious a fixed VPN IP address of 10.9.0.1.
# First uncomment out these lines:
;client-config-dir ccd
;route 10.9.0.0 255.255.255.252
# Then add this line to ccd/Thelonious:
#   ifconfig-push 10.9.0.1 10.9.0.2

# Suppose that you want to enable different
# firewall access policies for different groups
# of clients.  There are two methods:
# (1) Run multiple OpenVPN daemons, one for each
#     group, and firewall the TUN/TAP interface
#     for each group/daemon appropriately.
# (2) (Advanced) Create a script to dynamically
#     modify the firewall in response to access
#     from different clients.  See man
#     page for more info on learn-address script.
;learn-address ./script

# If enabled, this directive will configure
# all clients to redirect their default
# network gateway through the VPN, causing
# all IP traffic such as web browsing and
# and DNS lookups to go through the VPN
# (The OpenVPN server machine may need to NAT
# or bridge the TUN/TAP interface to the internet
# in order for this to work properly).
push "redirect-gateway def1 bypass-dhcp"

# Certain Windows-specific network settings
# can be pushed to clients, such as DNS
# or WINS server addresses.  CAVEAT:
# http://openvpn.net/faq.html#dhcpcaveats
# The addresses below refer to the public
# DNS servers provided by opendns.com.
push "dhcp-option DNS 8.8.8.8"
push "dhcp-option DNS 8.8.4.4"

# Uncomment this directive to allow different
# clients to be able to "see" each other.
# By default, clients will only see the server.
# To force clients to only see the server, you
# will also need to appropriately firewall the
# server's TUN/TAP interface.
;client-to-client

# Uncomment this directive if multiple clients
# might connect with the same certificate/key
# files or common names.  This is recommended
# only for testing purposes.  For production use,
# each client should have its own certificate/key
# pair.
#
# IF YOU HAVE NOT GENERATED INDIVIDUAL
# CERTIFICATE/KEY PAIRS FOR EACH CLIENT,
# EACH HAVING ITS OWN UNIQUE "COMMON NAME",
# UNCOMMENT THIS LINE OUT.
;duplicate-cn

# The keepalive directive causes ping-like
# messages to be sent back and forth over
# the link so that each side knows when
# the other side has gone down.
# Ping every 10 seconds, assume that remote
# peer is down if no ping received during
# a 120 second time period.
keepalive 10 120

# For extra security beyond that provided
# by SSL/TLS, create an "HMAC firewall"
# to help block DoS attacks and UDP port flooding.
#
# Generate with:
#   openvpn --genkey --secret ta.key
#
# The server and each client must have
# a copy of this key.
# The second parameter should be '0'
# on the server and '1' on the clients.
;tls-auth ta.key 0 # This file is secret

# Select a cryptographic cipher.
# This config item must be copied to
# the client config file as well.
;cipher BF-CBC        # Blowfish (default)
;cipher AES-128-CBC   # AES
;cipher DES-EDE3-CBC  # Triple-DES

# Enable compression on the VPN link.
# If you enable it here, you must also
# enable it in the client config file.
comp-lzo

# The maximum number of concurrently connected
# clients we want to allow.
;max-clients 100

# It's a good idea to reduce the OpenVPN
# daemon's privileges after initialization.
#
# You can uncomment this out on
# non-Windows systems.
user nobody
group nobody

# The persist options will try to avoid
# accessing certain resources on restart
# that may no longer be accessible because
# of the privilege downgrade.
persist-key
persist-tun

# Output a short status file showing
# current connections, truncated
# and rewritten every minute.
status openvpn-status.log

# By default, log messages will go to the syslog (or
# on Windows, if running as a service, they will go to
# the "\Program Files\OpenVPN\log" directory).
# Use log or log-append to override this default.
# "log" will truncate the log file on OpenVPN startup,
# while "log-append" will append to it.  Use one
# or the other (but not both).
;log         openvpn.log
log-append  openvpn.log

# Set the appropriate level of log
# file verbosity.
#
# 0 is silent, except for fatal errors
# 4 is reasonable for general usage
# 5 and 6 can help to debug connection problems
# 9 is extremely verbose
verb 3

# Silence repeating messages.  At most 20
# sequential messages of the same message
# category will be output to the log.
;mute 20
push "redirect-gateway def1"

[Xela]

serwer zestawił tunel w ogóle? pokaż konfig klienta i logi openvpn po stronie serwera

PS wycinaj komenty we wklejkach bo licho się to czyta

[gambi]

Ostatni fragment z logu serwera:

Kod: Zaznacz cały

/etc/openvpn/openvpn.log                                                                                                                                                                                        406270/397K              100%
Fri Sep 23 12:25:55 2016 ROUTE_GATEWAY 217.61.1.1/255.255.255.0 IFACE=eth0 HWADDR=00:50:56:9f:3d:66
Fri Sep 23 12:25:55 2016 TUN/TAP device tun0 opened
Fri Sep 23 12:25:55 2016 TUN/TAP TX queue length set to 100
Fri Sep 23 12:25:55 2016 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Fri Sep 23 12:25:55 2016 /usr/sbin/ip link set dev tun0 up mtu 1500
Fri Sep 23 12:25:55 2016 /usr/sbin/ip addr add dev tun0 local 10.8.0.1 peer 10.8.0.2
Fri Sep 23 12:25:55 2016 /usr/sbin/ip route add 10.8.0.0/24 via 10.8.0.2
Fri Sep 23 12:25:55 2016 GID set to nobody
Fri Sep 23 12:25:55 2016 UID set to nobody
Fri Sep 23 12:25:55 2016 UDPv4 link local (bound): [undef]
Fri Sep 23 12:25:55 2016 UDPv4 link remote: [undef]
Fri Sep 23 12:25:55 2016 MULTI: multi_init called, r=256 v=256
Fri Sep 23 12:25:55 2016 IFCONFIG POOL: base=10.8.0.4 size=62, ipv6=0
Fri Sep 23 12:25:55 2016 ifconfig_pool_read(), in='client,10.8.0.4', TODO: IPv6
Fri Sep 23 12:25:55 2016 succeeded -> ifconfig_pool_set()
Fri Sep 23 12:25:55 2016 IFCONFIG POOL LIST
Fri Sep 23 12:25:55 2016 client,10.8.0.4
Fri Sep 23 12:25:55 2016 Initialization Sequence Completed
Sat Sep 24 15:36:53 2016 OpenVPN 2.3.12 x86_64-redhat-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [PKCS11] [MH] [IPv6] built on Aug 23 2016
Sat Sep 24 15:36:53 2016 library versions: OpenSSL 1.0.1e-fips 11 Feb 2013, LZO 2.06
Sat Sep 24 15:36:53 2016 Diffie-Hellman initialized with 2048 bit key
Sat Sep 24 15:36:53 2016 Socket Buffers: R=[212992->212992] S=[212992->212992]
Sat Sep 24 15:36:53 2016 ROUTE_GATEWAY 217.61.1.1/255.255.255.0 IFACE=eth0 HWADDR=00:50:56:9f:3d:66
Sat Sep 24 15:36:53 2016 TUN/TAP device tun0 opened
Sat Sep 24 15:36:53 2016 TUN/TAP TX queue length set to 100
Sat Sep 24 15:36:53 2016 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Sat Sep 24 15:36:53 2016 /usr/sbin/ip link set dev tun0 up mtu 1500
Sat Sep 24 15:36:53 2016 /usr/sbin/ip addr add dev tun0 local 10.8.0.1 peer 10.8.0.2
Sat Sep 24 15:36:53 2016 /usr/sbin/ip route add 10.8.0.0/24 via 10.8.0.2
Sat Sep 24 15:36:53 2016 GID set to nobody
Sat Sep 24 15:36:53 2016 UID set to nobody
Sat Sep 24 15:36:53 2016 UDPv4 link local (bound): [undef]
Sat Sep 24 15:36:53 2016 UDPv4 link remote: [undef]
Sat Sep 24 15:36:53 2016 MULTI: multi_init called, r=256 v=256
Sat Sep 24 15:36:53 2016 IFCONFIG POOL: base=10.8.0.4 size=62, ipv6=0
Sat Sep 24 15:36:53 2016 ifconfig_pool_read(), in='client,10.8.0.4', TODO: IPv6
Sat Sep 24 15:36:53 2016 succeeded -> ifconfig_pool_set()
Sat Sep 24 15:36:53 2016 IFCONFIG POOL LIST
Sat Sep 24 15:36:53 2016 client,10.8.0.4
Sat Sep 24 15:36:53 2016 Initialization Sequence Completed
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 TLS: Initial packet from [AF_INET]213.92.164.227:61344, sid=c2ade4c7 d9fb5c10
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 VERIFY OK: depth=1, C=US, ST=CA, L=SanFrancisco, O=Fort-Funston, OU=MyOrganizationalUnit, CN=Fort-Funston CA, name=server, emailAddress=me@myhost.mydomain
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 VERIFY OK: depth=0, C=US, ST=CA, L=SanFrancisco, O=Fort-Funston, OU=MyOrganizationalUnit, CN=client, name=server, emailAddress=me@myhost.mydomain
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 WARNING: 'keydir' is present in remote config but missing in local config, remote='keydir 1'
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 WARNING: this cipher's block size is less than 128 bit (64 bit).  Consider using a --cipher with a larger block size.
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 WARNING: this cipher's block size is less than 128 bit (64 bit).  Consider using a --cipher with a larger block size.
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 Control Channel: TLSv1.2, cipher TLSv1/SSLv3 DHE-RSA-AES256-GCM-SHA384, 2048 bit RSA
Sat Sep 24 15:39:41 2016 213.92.164.227:61344 [client] Peer Connection Initiated with [AF_INET]213.92.164.227:61344
Sat Sep 24 15:39:41 2016 client/213.92.164.227:61344 MULTI_sva: pool returned IPv4=10.8.0.6, IPv6=(Not enabled)
Sat Sep 24 15:39:41 2016 client/213.92.164.227:61344 MULTI: Learn: 10.8.0.6 -> client/213.92.164.227:61344
Sat Sep 24 15:39:41 2016 client/213.92.164.227:61344 MULTI: primary virtual IP for client/213.92.164.227:61344: 10.8.0.6
Sat Sep 24 15:39:43 2016 client/213.92.164.227:61344 PUSH: Received control message: 'PUSH_REQUEST'
Sat Sep 24 15:39:43 2016 client/213.92.164.227:61344 send_push_reply(): safe_cap=940
Sat Sep 24 15:39:43 2016 client/213.92.164.227:61344 SENT CONTROL [client]: 'PUSH_REPLY,redirect-gateway def1 bypass-dhcp,dhcp-option DNS 8.8.8.8,dhcp-option DNS 8.8.4.4,redirect-gateway def1,route 10.8.0.1,topology net30,ping 10,ping-re
start 120,ifconfig 10.8.0.6 10.8.0.5' (status=1)


 

konfig klienta:

Kod: Zaznacz cały

client
port 1194
remote 217.61.1.233
comp-lzo yes
dev tun
proto udp
nobind
auth-nocache
persist-key
persist-tun
verb 2
key-direction 1
<ca>
-----BEGIN CERTIFICATE-----
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-----END CERTIFICATE-----
</ca>
<cert>
-----BEGIN CERTIFICATE-----
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-----END CERTIFICATE-----
</cert>
<key>
-----BEGIN PRIVATE KEY-----
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-----END PRIVATE KEY-----
</key>