Thank you for your response, I did changes as suggested :
and now, on remote side routing :
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.10.10.1 10.10.10.5 255.255.255.255 UGH 0 0 0 tun11
10.10.10.5 * 255.255.255.255 UH 0 0 0 tun11
10.8.0.2 * 255.255.255.255 UH 0 0 0 tun21
192.168.141.254 * 255.255.255.255 UH 0 0 0 vlan1
192.168.20.0 10.10.10.5 255.255.255.0 UG 0 0 0 tun11
10.8.0.0 10.8.0.2 255.255.255.0 UG 0 0 0 tun21
192.168.10.0 * 255.255.255.0 U 0 0 0 br0
192.168.141.0 * 255.255.255.0 U 0 0 0 vlan1
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default 192.168.141.254 0.0.0.0 UG 0 0 0 vlan1
On OpenVPN server side :
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 178.26.23.254 UGS 0 1071098 vr1
10.10.10.0/24 10.10.10.2 UGS 0 3 ovpns2
10.10.10.1 link#12 UHS 0 0 lo0
10.10.10.2 link#12 UH 0 0 ovpns2
127.0.0.1 link#6 UH 0 14102 lo0
192.168.10.0/24 10.10.10.2 UGS 0 54 ovpns2
192.168.20.0/24 link#10 U 0 1279213 bridge
192.168.20.254 link#10 UHS 0 0 lo0
And now I'm checking from host behind OpenVPN server (192.168.20.1)
[~] # ping 192.168.10.130
PING 192.168.10.130 (192.168.10.130): 56 data bytes
^C
--- 192.168.10.130 ping statistics ---
53 packets transmitted, 0 packets received, 100% packet loss
[~] # ping 192.168.10.1
PING 192.168.10.1 (192.168.10.1): 56 data bytes
^C
--- 192.168.10.1 ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
[~] # ping 10.10.10.6
PING 10.10.10.6 (10.10.10.6): 56 data bytes
64 bytes from 10.10.10.6: icmp_seq=0 ttl=63 time=62.1 ms
64 bytes from 10.10.10.6: icmp_seq=1 ttl=63 time=64.8 ms
64 bytes from 10.10.10.6: icmp_seq=2 ttl=63 time=46.9 ms
^C
--- 10.10.10.6 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 46.9/57.9/64.8 ms
[~] # ping 10.10.10.1
PING 10.10.10.1 (10.10.10.1): 56 data bytes
64 bytes from 10.10.10.1: icmp_seq=0 ttl=64 time=0.4 ms
64 bytes from 10.10.10.1: icmp_seq=1 ttl=64 time=0.2 ms
^C
--- 10.10.10.1 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 0.2/0.3/0.4 ms
[~] # ping 10.10.10.2
PING 10.10.10.2 (10.10.10.2): 56 data bytes
^C
--- 10.10.10.2 ping statistics ---
2 packets transmitted, 0 packets received, 100% packet loss
[~] # ping 10.10.10.5
PING 10.10.10.5 (10.10.10.5): 56 data bytes
^C
--- 10.10.10.5 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss
[~] # traceroute 192.168.10.130
traceroute to 192.168.10.130 (192.168.10.130), 30 hops max, 40 byte packets
1 192.168.20.254 (192.168.20.254) 1.113 ms 0.377 ms 0.348 ms
2 *^C
[~] #
So I can ping 10.10.10.6 which is on tunnel end, but nothing on 192.168.10.0 network.
Log from client :
Feb 9 12:23:34 tomato daemon.notice openvpn[1121]: OpenVPN 2.1.1 mipsel-unknown-linux-gnu [SSL] [LZO2] [EPOLL] built on Dec 4 2011
Feb 9 12:23:34 tomato daemon.warn openvpn[1121]: WARNING: No server certificate verification method has been enabled. See http://openvpn.net/howto.html#mitm for more info.
Feb 9 12:23:34 tomato daemon.warn openvpn[1121]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Feb 9 12:23:34 tomato daemon.notice openvpn[1121]: LZO compression initialized
Feb 9 12:23:34 tomato daemon.notice openvpn[1121]: Control Channel MTU parms [ L:1558 D:138 EF:38 EB:0 ET:0 EL:0 ]
Feb 9 12:23:34 tomato daemon.notice openvpn[1121]: Data Channel MTU parms [ L:1558 D:1450 EF:58 EB:135 ET:0 EL:0 AF:3/1 ]
Feb 9 12:23:35 tomato daemon.notice openvpn[1127]: Socket Buffers: R=[32767->65534] S=[32767->65534]
Feb 9 12:23:35 tomato daemon.notice openvpn[1127]: UDPv4 link local: [undef]
Feb 9 12:23:35 tomato daemon.notice openvpn[1127]: UDPv4 link remote: xx.xx.xx.xx:1195
Feb 9 12:23:35 tomato daemon.notice openvpn[1127]: TLS: Initial packet from xx.xx.xx.xx:1195, sid=76b8ea0b 54d5e74d
Feb 9 12:23:35 tomato daemon.notice openvpn[1127]: VERIFY OK: depth=1, xxxxxxxxxxxxxxxxxxxx
Feb 9 12:23:35 tomato daemon.notice openvpn[1127]: VERIFY OK: depth=0, xxxxxxxxxxxxxxxxxxxx
Feb 9 12:23:37 tomato daemon.notice openvpn[1127]: Data Channel Encrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Feb 9 12:23:37 tomato daemon.notice openvpn[1127]: Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Feb 9 12:23:37 tomato daemon.notice openvpn[1127]: Data Channel Decrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Feb 9 12:23:37 tomato daemon.notice openvpn[1127]: Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Feb 9 12:23:37 tomato daemon.notice openvpn[1127]: Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 2048 bit RSA
Feb 9 12:23:37 tomato daemon.notice openvpn[1127]: [ag-net.eu] Peer Connection Initiated with 178.26.16.94:1195
Feb 9 12:23:40 tomato daemon.notice openvpn[1127]: SENT CONTROL [ag-net.eu]: 'PUSH_REQUEST' (status=1)
Feb 9 12:23:40 tomato daemon.notice openvpn[1127]: PUSH: Received control message: 'PUSH_REPLY,route 192.168.20.0 255.255.255.0,route 10.10.10.1,topology net30,ping 10,ping-restart 60,ifconfig 10.10.10.6 10.10.10.5'
Feb 9 12:23:40 tomato daemon.notice openvpn[1127]: OPTIONS IMPORT: timers and/or timeouts modified
Feb 9 12:23:40 tomato daemon.notice openvpn[1127]: OPTIONS IMPORT: --ifconfig/up options modified
Feb 9 12:23:40 tomato daemon.notice openvpn[1127]: OPTIONS IMPORT: route options modified
Feb 9 12:23:40 tomato daemon.notice openvpn[1127]: TUN/TAP device tun11 opened
Feb 9 12:23:40 tomato daemon.notice openvpn[1127]: TUN/TAP TX queue length set to 100
Feb 9 12:23:40 tomato daemon.notice openvpn[1127]: /sbin/ifconfig tun11 10.10.10.6 pointopoint 10.10.10.5 mtu 1500
Feb 9 12:23:40 tomato daemon.notice openvpn[1127]: updown.sh tun11 1500 1558 10.10.10.6 10.10.10.5 init
Feb 9 12:23:41 tomato daemon.notice openvpn[1127]: /sbin/route add -net 192.168.20.0 netmask 255.255.255.0 gw 10.10.10.5
Feb 9 12:23:41 tomato daemon.notice openvpn[1127]: /sbin/route add -net 10.10.10.1 netmask 255.255.255.255 gw 10.10.10.5
Feb 9 12:23:41 tomato daemon.notice openvpn[1127]: Initialization Sequence Completed
And another thing, on client router (Tomato) I have syslog pointing to 192.168.20.1 (internal NAS behind pfsense router), what I see in tcpdump :
12:59:40.108160 IP 10.10.10.6.2048 > 192.168.20.1.514: SYSLOG cron.info, length: 97
12:59:40.144467 IP 10.10.10.6.2048 > 192.168.20.1.514: SYSLOG syslog.info, length: 37
And I can see those entries in syslog, but it's coming from 10.10.10.6 not 192.168.10.1