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Re: [Openvpn-users] Unexpected WARNINGS


  • Subject: Re: [Openvpn-users] Unexpected WARNINGS
  • From: Jan Just Keijser <janjust@xxxxxxxxx>
  • Date: Fri, 07 Dec 2007 11:14:11 +0100

Hi Tiger Big,

hmmm I misread your config file a little bit. I saw
tls-client
ifconfig <IP> <IP>
the first statement is a client/server setup (openvpn 2.x) whereas the
second statement is used mostly in point-to-point (openvpn 1.x) setups.
However, if you use
ifconfig <IP> <NETMASK>
which your config file shows then you're fine. Sorry about that.

As for the warnings, your client log file shows that you're connecting
thru an HTTP proxy - I presume this is intentional; it might be best to
reflect this in the openvpn client config file. It should not make much
difference but you never know.

Finally, try reducing the 'tun-mtu' parameter on both sides (to e.g.
1200) and see if that helps at all.

cheers,

JJK

Tiger Big wrote:
> thanks Jan, but still the same results/warnings.
>
> one more question, why would you say "config files don't make sense" ?
> the only difference between my original conf and your modified version
> is the method of how to obtain IP address.
>
>
>
> On Dec 6, 2007 5:06 PM, Jan Just Keijser <janjust@xxxxxxxxx> wrote:
>   
>> your client and server config files don't make sense. Try this for the
>> server config:
>>
>> local xxx.xxx.org
>>
>> port 8080
>> proto tcp-server
>> tls-server
>> server 192.168.10.0 255.255.255.0
>>
>> dev tap0
>> cert X509/Server/server.crt
>> key X509/Server/server.key
>> dh X509/Server/dh1024.pem
>> ca X509/CA/ca.crt
>>
>> keepalive 10 120
>> user nobody
>> group nobody
>> persist-key
>> persist-tun
>> comp-lzo
>> verb 4
>> mute 10
>>
>> and this for the client
>>
>> local abc
>> remote xxx.xxx.org  8080
>>
>> proto tcp-client
>> tls-client
>> dev tap
>> dev-node tap0
>> nobind
>> cert D:\\OpenVPN\\easy-rsa\\keys\\Tiger.crt
>> key D:\\OpenVPN\\easy-rsa\\keys\\Tiger.key
>> ca D:\\OpenVPN\\easy-rsa\\keys\\ca.crt
>>
>> keepalive 10 120
>> comp-lzo
>> verb 4
>> mute 10
>>
>> HTH,
>>
>> JJK
>>
>>
>> Tiger Big wrote:
>>     
>>> Server Configuration (Linux):
>>> −−−−−−−−−−−−−−−−−−
>>> local xxx.xxx.org
>>> port 8080
>>> proto tcp-server
>>> tls-server
>>> dev tap0
>>> cert X509/Server/server.crt
>>> key X509/Server/server.key
>>> dh X509/Server/dh1024.pem
>>> ca X509/CA/ca.crt
>>> ifconfig 192.168.10.11 255.255.255.0
>>> keepalive 10 120
>>> user nobody
>>> group nobody
>>> persist-key
>>> persist-tun
>>> comp-lzo
>>> verb 4
>>> mute 10
>>> −−−−−−−−−−−−−−−−−−
>>>
>>>
>>> Client Configuration (WinXP):
>>> ------------------------------------------
>>> local abc
>>> remote xxx.xxx.org  8080
>>> proto tcp-client
>>> tls-client
>>> dev tap
>>> dev-node tap0
>>> nobind
>>> cert D:\\OpenVPN\\easy-rsa\\keys\\Tiger.crt
>>> key D:\\OpenVPN\\easy-rsa\\keys\\Tiger.key
>>> ca D:\\OpenVPN\\easy-rsa\\keys\\ca.crt
>>> ifconfig 192.168.10.11  255.255.255.0
>>> keepalive 10 120
>>> comp-lzo
>>> verb 4
>>> mute 10
>>> --------------------------------------------
>>>
>>> Output of Server:
>>> −−−−−−−−−−−−−−−−−−−−−−
>>> Wed Nov  7 22:46:52 2007 us=395451 OpenVPN 2.0.9 mipsel-unknown-linux
>>> [SSL] [LZO] built on Oct  8 2007
>>> Wed Nov  7 22:46:53 2007 us=139174 Diffie-Hellman initialized with
>>> 1024 bit key
>>> Wed Nov  7 22:46:53 2007 us=167393 LZO compression initialized
>>> Wed Nov  7 22:46:53 2007 us=177324 Control Channel MTU parms [ L:1576
>>> D:140 EF:40 EB:0 ET:0 EL:0 ]
>>> Wed Nov  7 22:46:53 2007 us=207122 TUN/TAP device tap0 opened
>>> Wed Nov  7 22:46:53 2007 us=209204 TUN/TAP TX queue length set to 100
>>> Wed Nov  7 22:46:53 2007 us=211730 /sbin/ifconfig tap0 192.168.10.11
>>> netmask 255.255.255.0
>>> mtu 1500 broadcast 192.168.10.255
>>>       
>>> Wed Nov  7 22:46:53 2007 us=276813 Data Channel MTU parms [ L:1576
>>> D:1450 EF:44 EB:135 ET:32 EL:0 AF:3/1 ]
>>> Wed Nov  7 22:46:53 2007 us=278702 GID set to nobody
>>> Wed Nov  7 22:46:53 2007 us=279692 UID set to nobody
>>> Wed Nov  7 22:46:53 2007 us=280933 Listening for incoming TCP
>>> connection on 123.45.67.89:8080
>>>       
>>> Wed Nov  7 22:47:00 2007 us=344674 TCP connection established with
>>> 98.76.54.32:48883
>>>       
>>> Wed Nov  7 22:47:00 2007 us=345622 Socket Buffers: R=[43689->65534]
>>> S=[16384->65534]
>>> Wed Nov  7 22:47:00 2007 us=346587 TCPv4_SERVER link local (bound):
>>> 123.45.67.89:8080
>>>       
>>> Wed Nov  7 22:47:00 2007 us=347462 TCPv4_SERVER link remote:
>>> 98.76.54.32:48883
>>>       
>>> Wed Nov  7 22:47:00 2007 us=354161 TLS: Initial packet from
>>> 98.76.54.32:48883 sid=2e4d871b 12ba58ca
>>>       
>>> Wed Nov  7 22:47:02 2007 us=930794 VERIFY OK: depth=1,
>>> /C=CN/ST=SH/L=SH/O=Company/OU=Building_3_/CN=WR850G/Email=xxx@xxxxxxx
>>> <mailto:xxx@xxxxxxx>
>>>       
>>> Wed Nov  7 22:47:02 2007 us=953126 VERIFY OK: depth=0,
>>> /C=CN/ST=SH/O=Company/OU=Building_3_/CN=Tiger/Email= xxx@xxxxxxx
>>> <mailto:xxx@xxxxxxx>
>>>       
>>> Wed Nov  7 22:47:04 2007 us=189347 Data Channel Encrypt: Cipher
>>> 'BF-CBC' initialized with 128 bit key
>>> Wed Nov  7 22:47:04 2007 us=192065 Data Channel Encrypt: Using 160 bit
>>> message hash 'SHA1' for HMAC authentication
>>> Wed Nov  7 22:47:04 2007 us=196237 Data Channel Decrypt: Cipher
>>> 'BF-CBC' initialized with 128 bit key
>>> Wed Nov  7 22:47:04 2007 us=198498 Data Channel Decrypt: Using 160 bit
>>> message hash 'SHA1' for HMAC authentication
>>> Wed Nov  7 22:47:04 2007 us=388832 Control Channel: TLSv1, cipher
>>> TLSv1/SSLv3 EDH-RSA-DES-CBC3-SHA, 1024 bit RSA
>>> Wed Nov  7 22:47:04 2007 us=392021 [Tiger] Peer Connection Initiated
>>> with 98.76.54.32:48883
>>>       
>>
>>     
>>> Wed Nov  7 22:47:05 2007 us=629230 Initialization Sequence Completed
>>> −−−−−−−−−−−−−−−−−−−−−−
>>>
>>> Output of Client:
>>> -----------------------------------------------------
>>> Thu Nov 08 14:46:58 2007 us=24485 Current Parameter Settings:
>>> Thu Nov 08 14:46:58 2007 us=24531   config = 'client.ovpn'
>>> Thu Nov 08 14:46:58 2007 us=24541   mode = 0
>>> Thu Nov 08 14:46:58 2007 us=24552   show_ciphers = DISABLED
>>> Thu Nov 08 14:46:58 2007 us=24562   show_digests = DISABLED
>>> Thu Nov 08 14:46:58 2007 us=24572   show_engines = DISABLED
>>> Thu Nov 08 14:46:58 2007 us=24582   genkey = DISABLED
>>> Thu Nov 08 14:46:58 2007 us=24593   key_pass_file = '[UNDEF]'
>>> Thu Nov 08 14:46:58 2007 us=24603   show_tls_ciphers = DISABLED
>>> Thu Nov 08 14:46:58 2007 us=24614   proto = 2
>>> Thu Nov 08 14:46:58 2007 us=24624 NOTE: --mute triggered...
>>> Thu Nov 08 14:46:58 2007 us=24651 188 variation(s) on previous 10
>>> message(s) suppressed by --mute
>>> Thu Nov 08 14:46:58 2007 us=24666 OpenVPN 2.0.9 Win32-MinGW [SSL]
>>> [LZO] built on Oct  1 2006
>>> Thu Nov 08 14:46:58 2007 us=24748 IMPORTANT: OpenVPN's default port
>>> number is now 1194, based on an official port number assignment by
>>> IANA.  OpenVPN 2.0-beta16 and earlier used 5000 as the default port.
>>> Thu Nov 08 14:46:58 2007 us=24763 WARNING: No server certificate
>>> verification method has been enabled.  See
>>> http://openvpn.net/howto.html#mitm for more info.
>>> Thu Nov 08 14:46:58 2007 us=26495 LZO compression initialized
>>> Thu Nov 08 14:46:58 2007 us=26589 Control Channel MTU parms [ L:1576
>>> D:140 EF:40 EB:0 ET:0 EL:0 ]
>>> Thu Nov 08 14:46:58 2007 us=46092 TAP-WIN32 device [tap0] opened:
>>> \\.\Global\{B45A907D-B030-4F6F-9FE1-001F6C3AEB48}.tap
>>> Thu Nov 08 14:46:58 2007 us=46122 TAP-Win32 Driver Version 8.4
>>> Thu Nov 08 14:46:58 2007 us=46135 TAP-Win32 MTU=1500
>>> Thu Nov 08 14:46:58 2007 us=46156 Notified TAP-Win32 driver to set a
>>> DHCP IP/netmask of 192.168.10.11/255.255.255.0
>>> on interface
>>>       
>>> {B45A907D-B030-4F6F-9FE1-001F6C3AEB48} [DHCP-serv: 192.168.10.0
>>>  lease-time: 31536000]
>>>       
>>> Thu Nov 08 14:46:58 2007 us=53796 Successful ARP Flush on interface
>>> [3] {B45A907D-B030-4F6F-9FE1-001F6C3AEB48}
>>> Thu Nov 08 14:46:58 2007 us=55539 Data Channel MTU parms [ L:1576
>>> D:1450 EF:44 EB:135 ET:32 EL:0 AF:3/1 ]
>>> Thu Nov 08 14:46:58 2007 us=55586 Local Options String: 'V4,dev-type
>>> tap,link-mtu 1576,tun-mtu 1532,proto TCPv4_CLIENT,ifconfig
>>> 192.168.10.0  255.255.255.0
>>> ,comp-lzo,cipher BF-CBC,auth SHA1,keysize
>>>       
>>> 128,key-method 2,tls-client'
>>> Thu Nov 08 14:46:58 2007 us=55602 Expected Remote Options String:
>>> 'V4,dev-type tap,link-mtu 1576,tun-mtu 1532,proto
>>> TCPv4_SERVER,ifconfig 192.168.10.0  255.255.255.0
>>> ,comp-lzo,cipher BF-CBC,auth SHA1,keysize
>>>       
>>> 128,key-method 2,tls-server'
>>> Thu Nov 08 14:46:58 2007 us=55634 Local Options hash (VER=V4): '1b763cc3'
>>> Thu Nov 08 14:46:58 2007 us=55652 Expected Remote Options hash
>>> (VER=V4): '2f5a5592'
>>> Thu Nov 08 14:46:58 2007 us=55680 Attempting to establish TCP
>>> connection with 127.0.0.1:3128
>>>       
>>> Thu Nov 08 14:46:58 2007 us=63009 TCP connection established with
>>> 127.0.0.1:3128
>>>       
>>> Thu Nov 08 14:46:58 2007 us=63039 Send to HTTP proxy: 'CONNECT
>>> xxx.xxx.org:8080  HTTP/1.0'
>>>       
>>> Thu Nov 08 14:46:59 2007 us=159521 HTTP proxy returned: 'HTTP/1.1 200
>>> Connection established'
>>> Thu Nov 08 14:47:01 2007 us=158850 Socket Buffers: R=[8192->8192]
>>> S=[8192->8192]
>>> Thu Nov 08 14:47:01 2007 us=159020 TCPv4_CLIENT link local:
>>> 172.24.201.50
>>>       
>>> Thu Nov 08 14:47:01 2007 us=159037 TCPv4_CLIENT link remote:
>>> 127.0.0.1:3128
>>>       
>>> Thu Nov 08 14:47:01 2007 us=390961 TLS: Initial packet from
>>> 127.0.0.1:3128 , sid=9696962b 6944c74a
>>>       
>>> Thu Nov 08 14:47:03 2007 us=206615 VERIFY OK: depth=1,
>>> /C=CN/ST=SH/L=SH/O=Company/OU=Building_3_/CN=WR850G/emailAddress=
>>> xxx@xxxxxxx <mailto:xxx@xxxxxxx>
>>>       
>>> Thu Nov 08 14:47:03 2007 us=208774 VERIFY OK: depth=0,
>>> /C=CN/ST=SH/O=Company/OU=Building_3_/CN=Server/emailAddress=xxx@xxxxxxx
>>> <mailto:xxx@xxxxxxx>
>>>       
>>> Thu Nov 08 14:47:05 2007 us=389449 NOTE: Options consistency check may
>>> be skewed by version differences
>>> Thu Nov 08 14:47:05 2007 us=389494 WARNING: 'version' is used
>>> inconsistently, local='version V4', remote='version V0 UNDEF'
>>> Thu Nov 08 14:47:05 2007 us=389513 WARNING: 'dev-type' is present in
>>> local config but missing in remote config, local='dev-type tap'
>>> Thu Nov 08 14:47:05 2007 us=389531 WARNING: 'link-mtu' is present in
>>> local config but missing in remote config, local='link-mtu 1576'
>>> Thu Nov 08 14:47:05 2007 us=389549 WARNING: 'tun-mtu' is present in
>>> local config but missing in remote config, local='tun-mtu 1532'
>>> Thu Nov 08 14:47:05 2007 us=389571 WARNING: 'proto' is present in
>>> local config but missing in remote config, local='proto TCPv4_SERVER'
>>> Thu Nov 08 14:47:05 2007 us=389607 WARNING: 'ifconfig' is present in
>>> local config but missing in remote config, local='ifconfig
>>> 192.168.10.0  255.255.255.0 '
>>>       
>>> Thu Nov 08 14:47:05 2007 us=389625 WARNING: 'comp-lzo' is present in
>>> local config but missing in remote config, local='comp-lzo'
>>> Thu Nov 08 14:47:05 2007 us=389643 WARNING: 'cipher' is present in
>>> local config but missing in remote config, local='cipher BF-CBC'
>>> Thu Nov 08 14:47:05 2007 us=389659 WARNING: 'auth' is present in local
>>> config but missing in remote config, local='auth SHA1'
>>> Thu Nov 08 14:47:05 2007 us=389673 NOTE: --mute triggered...
>>> Thu Nov 08 14:47:05 2007 us=389977 3 variation(s) on previous 10
>>> message(s) suppressed by --mute
>>> Thu Nov 08 14:47:05 2007 us=389991 Data Channel Encrypt: Cipher
>>> 'BF-CBC' initialized with 128 bit key
>>> Thu Nov 08 14:47:05 2007 us=390009 Data Channel Encrypt: Using 160 bit
>>> message hash 'SHA1' for HMAC authentication
>>> Thu Nov 08 14:47:05 2007 us=390090 Data Channel Decrypt: Cipher
>>> 'BF-CBC' initialized with 128 bit key
>>> Thu Nov 08 14:47:05 2007 us=390106 Data Channel Decrypt: Using 160 bit
>>> message hash 'SHA1' for HMAC authentication
>>> Thu Nov 08 14:47:05 2007 us=390453 Control Channel: TLSv1, cipher
>>> TLSv1/SSLv3 EDH-RSA-DES-CBC3-SHA, 1024 bit RSA
>>> Thu Nov 08 14:47:05 2007 us=390487 [Server] Peer Connection Initiated
>>> with 127.0.0.1:3128
>>>       
>>> Thu Nov 08 14:47:06 2007 us=630508 TEST ROUTES: 0/0 succeeded len=-1
>>> ret=1 a=0 u/d=up
>>> Thu Nov 08 14:47:06 2007 us=630535 Initialization Sequence Completed
>>> ----------------------------------------------------------
>>>
>>>
>>> Why there're so many WARNINGS:
>>>
>>> 1.Both client and server use same version - 2.0.9,why does the client
>>> say: "NOTE: Options consistency check may be skewed by version
>>> differences"
>>> 2.Many options (like 'comp-lzo')  have been enabled in both client and
>>> server's configuration, why does client say " WARNING: 'comp-lzo' is
>>> present in local config but missing in remote config, local='comp-lzo'"?
>>> ------------------------------------------------------------------------
>>>
>>>       

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