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Routing Issue after upgrading to Android 4.4.2 #287

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?

After upgrading to Android 4.4.2 from 4.3, I experienced an issue about 
routing, the connection with the server is working properly, but the VPN client 
is only able to direct all traffic in the VPN, disabling the option "redirect- 
gateway ", it only works traffic directed to the private network, any other 
traffic directed to the public network seems to be stuck (which should not pass 
through  VPN). 
Obviously with Android 4.3 version all working properly. 
I would add that under windows 7, disabling the option "redirect-gateway", 
everything works fine, traffic routed on the VPN is only one directed towards 
the private network.

What mobile phone are you using?
Samsung Note 3 NEO SM-N7505 

Which Android Version and stock ROM or aftermarket like cyanogenmod?
Stock Firmware N7505XXUCNH1

Many Thanks.

Original issue reported on code.google.com by surgeon1...@gmail.com on 29 Sep 2014 at 9:46

GoogleCodeExporter commented 9 years ago 
Can you provide a log of your connection?

Original comment by arne@rfc2549.org on 29 Sep 2014 at 10:03

GoogleCodeExporter commented 9 years ago 
[deleted comment]
GoogleCodeExporter commented 9 years ago 
Here it is,
I have masked some parameters..

I thinks the problem is here:
2014-09-29 12:18:26 Options error: route parameter gateway 'wlan0' must be  
a valid address

================================================================================
=
9-29 12:18:21 OpenVPN 2.4-icsopenvpn [git:icsopenvpn_615-c430ab0e0cef9994]  
android-14-armeabi-v7a [SSL (OpenSSL)] [LZO] [SNAPPY] [LZ4] [EPOLL] [MH]  
[IPv6] built on Jun 24 2014
2014-09-29 12:18:21 library versions: OpenSSL 1.0.1h 5 Jun 2014, LZO 2.06
2014-09-29 12:18:21 MANAGEMENT: Connected to management server at  
/data/data/de.blinkt.openvpn/cache/mgmtsocket
2014-09-29 12:18:21 Stato della rete: CONNECTED  to WIFI "WIFI AP"
2014-09-29 12:18:21 MANAGEMENT: CMD 'hold release'
2014-09-29 12:18:21 MANAGEMENT: CMD 'username 'Auth' USERNAME'
2014-09-29 12:18:21 MANAGEMENT: CMD 'bytecount 2'
2014-09-29 12:18:21 MANAGEMENT: CMD 'password [...]'
2014-09-29 12:18:21 WARNING: No server certificate verification method has  
been enabled.  See http://openvpn.net/howto.html#mitm for more info.
2014-09-29 12:18:21 LZO compression initializing
2014-09-29 12:18:21 Control Channel MTU parms [ L:1544 D:140 EF:40 EB:0  
ET:0 EL:0 ]
2014-09-29 12:18:21 Data Channel MTU parms [ L:1544 D:1450 EF:44 EB:393  
ET:0 EL:0 ]
2014-09-29 12:18:21 Local Options String: 'V4,dev-type tun,link-mtu  
1544,tun-mtu 1500,proto TCPv4_CLIENT,comp-lzo,cipher BF-CBC,auth  
SHA1,keysize 128,key-method 2,tls-client'
2014-09-29 12:18:21 Expected Remote Options String: 'V4,dev-type  
tun,link-mtu 1544,tun-mtu 1500,proto TCPv4_SERVER,comp-lzo,cipher  
BF-CBC,auth SHA1,keysize 128,key-method 2,tls-server'
2014-09-29 12:18:21 Local Options hash (VER=V4): '69109d17'
2014-09-29 12:18:21 Expected Remote Options hash (VER=V4): 'c0103fa8'
2014-09-29 12:18:21 TCP/UDP: Preserving recently used remote address:  
[AF_INET]IP-SERVER:1194
2014-09-29 12:18:21 Socket Buffers: R=[1048576->131072] S=[1048576->131072]
2014-09-29 12:18:21 Attempting to establish TCP connection with  
[AF_INET]IP-SERVER:1194 [nonblock]
2014-09-29 12:18:21 Protecting socket fd 4
2014-09-29 12:18:21 MANAGEMENT: CMD 'state on'
2014-09-29 12:18:21 MANAGEMENT: CMD 'needok 'PROTECTFD' ok'
2014-09-29 12:18:22 TCP connection established with [AF_INET]IP-SERVER:1194
2014-09-29 12:18:22 Protecting socket fd 4
2014-09-29 12:18:22 MANAGEMENT: CMD 'needok 'PROTECTFD' ok'
2014-09-29 12:18:22 TCP_CLIENT link local: (not bound)
2014-09-29 12:18:22 TCP_CLIENT link remote: [AF_INET]IP-SERVER:1194
2014-09-29 12:18:22 MANAGEMENT: >STATE:1411985902,WAIT,,,
2014-09-29 12:18:22 P:WR1411985902.430292 28000003 MANAGEMENT:  
>STATE:1411985902,AUTH,,,
2014-09-29 12:18:22 TLS: Initial packet from [AF_INET]IP-SERVER:1194,  
sid=5e09695b 0b86322f
2014-09-29 12:18:22 P:W1411985902.431086 40 WARNING: this configuration may  
cache passwords in memory -- use the auth-nocache option to prevent this
2014-09-29 12:18:23  
P:WWWRRRRRRWWRWRWRRWWRWRWRRWWRWRWRRWWRWR1411985902.999338 14000002 VERIFY  
OK: depth=1, C=TW, ST=Taiwan, L=Taipei, O=Synology Inc., OU=Certificate  
Authority, CN=Synology Inc. CA, emailAddress=product@synology.com
2014-09-29 12:18:23 VERIFY OK: depth=0, C=TW, ST=Taiwan, L=Taipei,  
O=Synology Inc., OU=FTP Team, CN=synology.com,  
emailAddress=product@synology.com
2014-09-29 12:18:23 P:WRRWWRWRWWRRWWWWRWRRRRWRR1411985903.806251 14000002  
Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
2014-09-29 12:18:23 Data Channel Encrypt: Using 160 bit message hash 'SHA1'  
for HMAC authentication
2014-09-29 12:18:23 Data Channel Decrypt: Cipher 'BF-CBC' initialized with  
128 bit key
2014-09-29 12:18:23 Data Channel Decrypt: Using 160 bit message hash 'SHA1'  
for HMAC authentication
2014-09-29 12:18:23 P:WW1411985903.807491 14000002 Control Channel: TLSv1,  
cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA
2014-09-29 12:18:23 [synology.com] Peer Connection Initiated with  
[AF_INET]IP-SERVER:1194
2014-09-29 12:18:24 MANAGEMENT: >STATE:1411985904,GET_CONFIG,,,
2014-09-29 12:18:25 SENT CONTROL [synology.com]: 'PUSH_REQUEST' (status=1)
2014-09-29 12:18:26 P:WRRRR1411985906.005572 22000003 PUSH: Received  
control message: 'PUSH_REPLY,route 192.168.1.0 255.255.255.0,route  
192.168.10.0 255.255.255.0,route 0.0.0.0 0.0.0.0 wlan0,route  
192.168.10.1,topology net30,ping 10,ping-restart 60,ifconfig 192.168.10.6  
192.168.10.5'
2014-09-29 12:18:26 Options error: route parameter gateway 'wlan0' must be  
a valid address
2014-09-29 12:18:26 OPTIONS IMPORT: timers and/or timeouts modified
2014-09-29 12:18:26 Ottenute le informazioni sulle interfacce 192.168.10.6  
e 192.168.10.5, assumendo che il secondo indirizzo sia il peer remoto.  
Utilizzata la maschera /32 per l'IP locale. La modalità impostata da  
OpenVPN è "net30".
2014-09-29 12:18:26 OPTIONS IMPORT: --ifconfig/up options modified
2014-09-29 12:18:26 OPTIONS IMPORT: route options modified
2014-09-29 12:18:26 ROUTE_GATEWAY XX.XX.XX.254/255.255.255.0 IFACE=wlan0  
HWADDR=34:31:11:ea:43:ab
2014-09-29 12:18:26 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
2014-09-29 12:18:26 MANAGEMENT: >STATE:1411985906,ASSIGN_IP,,192.168.10.6,
2014-09-29 12:18:26 MANAGEMENT: CMD 'needok 'IFCONFIG' ok'
2014-09-29 12:18:26 MANAGEMENT: >STATE:1411985906,ADD_ROUTES,,,
2014-09-29 12:18:26 MANAGEMENT: CMD 'needok 'ROUTE' ok'
2014-09-29 12:18:26 MANAGEMENT: CMD 'needok 'ROUTE' ok'
2014-09-29 12:18:26 MANAGEMENT: CMD 'needok 'ROUTE' ok'
2014-09-29 12:18:26 MANAGEMENT: CMD 'needok 'ROUTE' ok'
2014-09-29 12:18:26 MANAGEMENT: CMD 'needok 'DNSSERVER' ok'
2014-09-29 12:18:26 MANAGEMENT: CMD 'needok 'DNSSERVER' ok'
2014-09-29 12:18:26 MANAGEMENT: CMD 'needok 'PERSIST_TUN_ACTION'  
OPEN_AFTER_CLOSE'
2014-09-29 12:18:26 Apertura interfaccia tun in corso:
2014-09-29 12:18:26 Indirizzi locali - IPv4: 192.168.10.6/32 IPv6: null  
MTU: 1500
2014-09-29 12:18:26 DNS Server: 208.67.220.220, 208.67.222.222, Dominio:  
null
2014-09-29 12:18:26 Routes: 192.168.1.0/24, 192.168.10.0/24, 192.168.10.1/32
2014-09-29 12:18:26 Routes excluded: XX.XX.XX.0/24
2014-09-29 12:18:26 VpnService routes installed: 192.168.1.0/24,  
192.168.10.0/24
2014-09-29 12:18:26 MANAGEMENT: CMD 'needok 'OPENTUN' ok'
2014-09-29 12:18:26 Initialization Sequence Completed
2014-09-29 12:18:26 MANAGEMENT:  
>STATE:1411985906,CONNECTED,SUCCESS,192.168.10.6,IP-SERVER
================================================================================
=

Original comment by surgeon1...@gmail.com on 29 Sep 2014 at 10:45

GoogleCodeExporter commented 9 years ago 
Yes the route pushed by the server is wrong. But OpenVPN on other platform will 
you give the same error. You can see that the routes which are installed are:

VpnService routes installed: 192.168.1.0/24,  192.168.10.0/24.

On a sidenote you might hit another bug regarding /32 configuration on 4.4. Can 
you try the prelease version (http://plai.de/android/ics-openvpn-0.6.18pre.apk) 
and see if it makes a difference? If yes, please post the log.

Original comment by arne@rfc2549.org on 29 Sep 2014 at 11:28

GoogleCodeExporter commented 9 years ago 
It's correct that VpnService has installed that routes (192.168.1.0/24, 
192.168.10.0/24), but I cannot understand why all the other traffic directed 
elsewhere (internet) is stuck. 
In this case, VpnService should not change the default gateway but add only 
routes for private network, is it correct?

The new pre-release have the same behavior.

Thanks.

Original comment by surgeon1...@gmail.com on 29 Sep 2014 at 11:54

GoogleCodeExporter commented 9 years ago 
I am really what stuck means in your context (if packets are routed wrong or 
DNS not working etc or your provider dropping DNS request to different DNS 
servers) but if there is really a bug that disables all traffic that is not VPN 
traffic that is more likely a bug in your Android firmware.

Original comment by arne@rfc2549.org on 29 Sep 2014 at 12:26

GoogleCodeExporter commented 9 years ago 
I am really what stuck means in your context (if packets are routed wrong or 
DNS not working etc or your provider dropping DNS request to different DNS 
servers) but if there is really a bug that disables all traffic that is not VPN 
traffic that is more likely a bug in your Android firmware.

Original comment by arne@rfc2549.org on 29 Sep 2014 at 12:26

GoogleCodeExporter commented 9 years ago 
yes, you're right!
the problem is that DNS resolution not working even though I push it.
I use opendns and there aren't any issue related my provider, I use it on wifi 
connection.
I solved routing dns resolution through VPN, I pushed routes for the opendns ip 
and all goes well, but the behavior is strange.

Thanks again.

Original comment by surgeon1...@gmail.com on 29 Sep 2014 at 1:29

GoogleCodeExporter commented 9 years ago 
Closing this issue since the problem is a configuration related problem and no 
general problem

Original comment by arne@rfc2549.org on 29 Sep 2014 at 1:32