ERROR: Linux route delete command failure

altiris · Jan 21, 2015, 3:02 AM

So I set up OpenVPN following this guide, https://www.highlnk.com/2013/12/configuring-openvpn-on-pfsense/

For Tunnel Network, I put "10.0.8.0/24" and I set local network to "192.168.10.0/24" (My LAN interface already uses subnet 192.168.10 …so I am not sure if I that will cause a conflict). Everything else is set up in the way of the guide except for the Dynamic DNS part (I am using same static IP assigned to pfsense WAN...that shouldnt cause a conflict I would think). Now the first time I tried connecting I used this command on my arch linux computer "sudo openvpn --config myconfignamehere.ovpn" and it worked out fine, I used wireshark to check if my data was encrypted and I used the route command to check my IPs and gateways, no errors in terminal either. Now its been a few days (Only I connect) when I use the same command I still get connected to the VPN and encryption is fine but I get this error message

ERROR: Linux route delete command failed: external program exited with error status: 2

Here is the full output when running the command I listed above,

sudo openvpn --config myconfigfile.ovpn 
[sudo] password for joobala: 
Tue Jan 20 21:58:14 2015 OpenVPN 2.3.6 x86_64-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [MH] [IPv6] built on Dec  2 2014
Tue Jan 20 21:58:14 2015 library versions: OpenSSL 1.0.1k 8 Jan 2015, LZO 2.08
Enter Auth Username: *****************************
Enter Auth Password: ******************************
Tue Jan 20 21:58:19 2015 Control Channel Authentication: tls-auth using INLINE static key file
Tue Jan 20 21:58:19 2015 UDPv4 link local (bound): [undef]
Tue Jan 20 21:58:19 2015 UDPv4 link remote: [AF_INET]MYEXTERNALIPHERE:1194
Tue Jan 20 21:58:19 2015 [myconfigfile] Peer Connection Initiated with [AF_INET]MYEXTERNALIPHERE:1194
Tue Jan 20 21:58:21 2015 TUN/TAP device tun0 opened
Tue Jan 20 21:58:21 2015 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Tue Jan 20 21:58:21 2015 /usr/bin/ip link set dev tun0 up mtu 1500
Tue Jan 20 21:58:21 2015 /usr/bin/ip addr add dev tun0 local 10.0.8.6 peer 10.0.8.5
RTNETLINK answers: File exists
Tue Jan 20 21:58:21 2015 ERROR: Linux route add command failed: external program exited with error status: 2
Tue Jan 20 21:58:21 2015 Initialization Sequence Completed

.ovpn config file

dev tun
persist-tun
persist-key
cipher AES-256-CBC
auth SHA1
tls-client
client
remote MYEXTERNALIP 1194 udp
lport 0
verify-x509-name "myconfigfile" name
auth-user-pass
auth-nocache
ns-cert-type server
comp-lzo adaptive

 <ca>-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----</ca> 
 <cert>-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----</cert> 
 <key>-----BEGIN PRIVATE KEY-----
-----END PRIVATE KEY-----</key> 
 <tls-auth>#
# 2048 bit OpenVPN static key
#
-----BEGIN OpenVPN Static key V1-----
-----END OpenVPN Static key V1-----</tls-auth> 
 key-direction 1

Now I dont know if this is client or server related, I tried looking for /usr/bin/ip link but nothing on the client machine….I also read online somewhere that this has to do with the server. Anyway, whats the fix?

Derelict · Jan 21, 2015, 3:11 AM

Looks like your linux already has that ip address assigned to an interface. Is OpenVPN running twice?

Did you turn it off and back on again?

altiris · Jan 24, 2015, 10:14 PM

@Derelict:

Looks like your linux already has that ip address assigned to an interface. Is OpenVPN running twice?

Did you turn it off and back on again?

No openvpn is not running twice, I have tried resetting the machine several times and same problem, this happens on my desktop which runs same distribution of linux on laptop also.

Derelict · Jan 24, 2015, 11:03 PM

Post the routing table of the computer doing this.

altiris · Jan 25, 2015, 5:39 AM

@Derelict:

Post the routing table of the computer doing this.

um..I don't really know what that is lol. Are you referring to /etc/iproute2/rt_tables ?

/etc/iproute2/rt_tables


# reserved values
#
255     local
254     main
253     default
0       unspec
#
# local
#
#1      inr.ruhep

route

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         gateway         0.0.0.0         UG    1024   0        0 enp7s0
10.0.8.0        10.0.8.5        255.255.255.0   UG    20     0        0 tun0
10.0.8.5        *               255.255.255.255 UH    0      0        0 tun0
static-92.452.1 gateway         255.255.255.255 UGH   0      0        0 enp7s0
128.0.0.0       10.0.8.5        128.0.0.0       UG    20     0        0 tun0
192.168.10.0    *               255.255.255.0   U     0      0        0 enp7s0

(I changed static ip to random numbers)

Derelict · Jan 25, 2015, 5:46 AM

That looks fine. What's not working?

altiris · Jan 25, 2015, 2:43 PM

@Derelict:

That looks fine. What's not working?

everything seems to be working, it's just that the error (in op) I got in the terminal was of concern to me, I thought something was wrong either on client or server end.

Derelict · Jan 25, 2015, 7:44 PM

Linux or OpenVPN forum might get you an answer.

altiris · Jan 30, 2015, 2:39 AM

@Derelict:

Linux or OpenVPN forum might get you an answer.

alright I will give it a shot, thank you for assisting me though!

Derelict · Jan 30, 2015, 2:44 AM

You know what. I think a lot of people get strange errors at that point. Not really an error but OpenVPN trying to do something that's already been done or something.