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AW: [Openvpn-users] Problem with openvpn and bridging


  • Subject: AW: [Openvpn-users] Problem with openvpn and bridging
  • From: "Ralf Gerhard" <EDV.Gerhard@xxxxxxxxxxx>
  • Date: Tue, 1 Jun 2004 15:54:22 +0200

Hi,

yes, I built the following bridge:
----
firewall:~# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.00096ba37526       no              eth0
                                                        tap0
                                                        tap1
                                                        tap2
                                                        tap3
                                                        tap4
                                                        tap5
----

eth0 is connected to the internal lan. The interfaces
eth1/eth2 are connected to the dmz/internet-router.

Below you will find the output of "ifconfig br0|eth0|tap0".
Interface tap0 has an ip-address, is this correct ?

Regards,

      Ralf Gerhard

firewall:~# ifconfig br0
br0       Link encap:Ethernet  HWaddr 00:09:6B:A3:75:26
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7494576 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9993616 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:795904466 (759.0 MiB)  TX bytes:3921128308 (3.6 GiB)

firewall:~# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:09:6B:A3:75:26
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:7495001 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9993974 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:930863471 (887.7 MiB)  TX bytes:3983530966 (3.7 GiB)
          Interrupt:24 Memory:faef0000-faf00000

firewall:~# ifconfig tap0
tap0      Link encap:Ethernet  HWaddr 00:FF:11:81:19:90
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:292 errors:0 dropped:0 overruns:0 frame:0
          TX packets:922701 errors:0 dropped:53075 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:34708 (33.8 KiB)  TX bytes:74587540 (71.1 MiB)

> Von: openvpn-users-admin@xxxxxxxxxxxxxxxxxxxxx
> [mailto:openvpn-users-admin@xxxxxxxxxxxxxxxxxxxxx] Im Auftrag 
> von Marc Lentwojt
> Gesendet: Dienstag, 1. Juni 2004 10:45
> An: openvpn-users@xxxxxxxxxxxxxxxxxxxxx
> Betreff: Re: [Openvpn-users] Problem with openvpn and bridging
> 
> 
> Hi,
> 
> did you install bridge-utils and build a bridge group ?
> 
> Regards
> 
> Marc
> 
> > Hello,
> >
> > I'm trying to setup a vpn in bridging mode but without
> success up to
> > now. The remote client can't ping a server in the local net.
> >
> > The configuration is based upon the howto by Florin Andrei.
> >
> > VPN server is our firewall (debian woody, openvpn-1.6.0 from
> > backports.org), Client is a XP system. Internal net is 
> 192.168.1.0/24,
> > dmz-net is 195.243.59.96/28
> >
> > In a faq I read "WARNING: Actual Remote Options" could be a
> problem,
> > but the only difference is "ifconfig 192.168.1.0 255.255.255.0" vs.
> > "ifconfig".
> >
> > Below you will find the servers log and the config of the client.
> >
> > Is this a openvpn config problem or does the firewall
> interfere ? Do
> > you have any hints?
> >
> >
> > Thanks in advance,
> >
> >       Ralf Gerhard
> >
> >
> > Server log:
> > Tue Jun  1 09:21:26 2004 129[0]: select : Interrupted system call
> > (code=4)
> > Tue Jun  1 09:21:26 2004 130[0]: SIGTERM received, exiting
> Tue Jun  1
> > 09:21:26 2004 131[0]: Closing TCP/UDP socket Tue Jun  1
> 09:21:26 2004
> > 132[0]: Closing TUN/TAP device Tue Jun  1 09:21:27 2004
> 0[0]: Current
> > Parameter Settings:
> > Tue Jun  1 09:21:27 2004 1[0]:   config = 
> '/etc/openvpn/sagaflor.conf'
> > Tue Jun  1 09:21:27 2004 2[0]:   persist_config = DISABLED
> > Tue Jun  1 09:21:27 2004 3[0]:   persist_mode = 1
> > Tue Jun  1 09:21:27 2004 4[0]:   show_ciphers = DISABLED
> > Tue Jun  1 09:21:27 2004 5[0]:   show_digests = DISABLED
> > Tue Jun  1 09:21:27 2004 6[0]:   genkey = DISABLED
> > Tue Jun  1 09:21:27 2004 7[0]:   askpass = DISABLED
> > Tue Jun  1 09:21:27 2004 8[0]:   show_tls_ciphers = DISABLED
> > Tue Jun  1 09:21:27 2004 9[0]:   proto = 0
> > Tue Jun  1 09:21:27 2004 10[0]:   local = '195.243.59.97'
> > Tue Jun  1 09:21:27 2004 11[0]:   remote = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 12[0]:   local_port = 5000
> > Tue Jun  1 09:21:27 2004 13[0]:   remote_port = 5000
> > Tue Jun  1 09:21:27 2004 14[0]:   remote_float = DISABLED
> > Tue Jun  1 09:21:27 2004 15[0]:   ipchange = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 16[0]:   bind_local = ENABLED
> > Tue Jun  1 09:21:27 2004 17[0]:   dev = 'tap0'
> > Tue Jun  1 09:21:27 2004 18[0]:   dev_type = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 19[0]:   dev_node = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 20[0]:   tun_ipv6 = DISABLED
> > Tue Jun  1 09:21:27 2004 21[0]:   ifconfig_local = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 22[0]:   ifconfig_remote_netmask = 
> '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 23[0]:   ifconfig_noexec = DISABLED
> > Tue Jun  1 09:21:27 2004 24[0]:   ifconfig_nowarn = DISABLED
> > Tue Jun  1 09:21:27 2004 25[0]:   shaper = 0
> > Tue Jun  1 09:21:27 2004 26[0]:   tun_mtu = 1500
> > Tue Jun  1 09:21:27 2004 27[0]:   tun_mtu_defined = ENABLED
> > Tue Jun  1 09:21:27 2004 28[0]:   link_mtu = 1300
> > Tue Jun  1 09:21:27 2004 29[0]:   link_mtu_defined = DISABLED
> > Tue Jun  1 09:21:27 2004 30[0]:   tun_mtu_extra = 32
> > Tue Jun  1 09:21:27 2004 31[0]:   tun_mtu_extra_defined = ENABLED
> > Tue Jun  1 09:21:27 2004 32[0]:   fragment = 1400
> > Tue Jun  1 09:21:27 2004 33[0]:   mtu_discover_type = -1
> > Tue Jun  1 09:21:27 2004 34[0]:   mtu_test = 0
> > Tue Jun  1 09:21:27 2004 35[0]:   mlock = DISABLED
> > Tue Jun  1 09:21:27 2004 36[0]:   inactivity_timeout = 0
> > Tue Jun  1 09:21:27 2004 37[0]:   ping_send_timeout = 10
> > Tue Jun  1 09:21:27 2004 38[0]:   ping_rec_timeout = 45
> > Tue Jun  1 09:21:27 2004 39[0]:   ping_rec_timeout_action = 2
> > Tue Jun  1 09:21:27 2004 40[0]:   ping_timer_remote = ENABLED
> > Tue Jun  1 09:21:27 2004 41[0]:   persist_tun = ENABLED
> > Tue Jun  1 09:21:27 2004 42[0]:   persist_local_ip = ENABLED
> > Tue Jun  1 09:21:27 2004 43[0]:   persist_remote_ip = DISABLED
> > Tue Jun  1 09:21:27 2004 44[0]:   persist_key = ENABLED
> > Tue Jun  1 09:21:27 2004 45[0]:   mssfix_defined = ENABLED
> > Tue Jun  1 09:21:27 2004 46[0]:   mssfix = 0
> > Tue Jun  1 09:21:27 2004 47[0]:   passtos = DISABLED
> > Tue Jun  1 09:21:27 2004 48[0]:   resolve_retry_seconds = 0
> > Tue Jun  1 09:21:27 2004 49[0]:   connect_retry_seconds = 5
> > Tue Jun  1 09:21:27 2004 50[0]:   username = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 51[0]:   groupname = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 52[0]:   chroot_dir = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 53[0]:   cd_dir = '/etc/openvpn'
> > Tue Jun  1 09:21:27 2004 54[0]:   writepid
> > '/var/run/openvpn.sagaflor.pid' Tue Jun  1 09:21:27 2004 55[0]:
> > up_script = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 56[0]:   down_script = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 57[0]:   up_restart = DISABLED
> > Tue Jun  1 09:21:27 2004 58[0]:   daemon = ENABLED
> > Tue Jun  1 09:21:27 2004 59[0]:   inetd = 0
> > Tue Jun  1 09:21:27 2004 60[0]:   log = ENABLED
> > Tue Jun  1 09:21:27 2004 61[0]:   nice = 0
> > Tue Jun  1 09:21:27 2004 62[0]:   verbosity = 4
> > Tue Jun  1 09:21:27 2004 63[0]:   mute = 0
> > Tue Jun  1 09:21:27 2004 64[0]:   gremlin = DISABLED
> > Tue Jun  1 09:21:27 2004 65[0]:   occ = ENABLED
> > Tue Jun  1 09:21:27 2004 66[0]:   http_proxy_server = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 67[0]:   http_proxy_port = 0
> > Tue Jun  1 09:21:27 2004 68[0]:   http_proxy_auth_method = 
> '[UNDEF]' Tue
> > Jun  1 09:21:27 2004 69[0]:   http_proxy_auth_file = 
> '[UNDEF]' Tue Jun
> > 1 09:21:27 2004 70[0]:   http_proxy_retry = DISABLED
> > Tue Jun  1 09:21:27 2004 71[0]:   socks_proxy_server = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 72[0]:   socks_proxy_port = 0
> > Tue Jun  1 09:21:27 2004 73[0]:   socks_proxy_retry = DISABLED
> > Tue Jun  1 09:21:27 2004 74[0]:   comp_lzo = ENABLED
> > Tue Jun  1 09:21:27 2004 75[0]:   comp_lzo_adaptive = ENABLED
> > Tue Jun  1 09:21:27 2004 76[0]:   route_script = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 77[0]:   route_default_gateway = 
> '[UNDEF]' Tue
> > Jun  1 09:21:27 2004 78[0]:   route_noexec = DISABLED
> > Tue Jun  1 09:21:27 2004 79[0]:   route_delay = 0
> > Tue Jun  1 09:21:27 2004 80[0]:   route_delay_defined = DISABLED
> > Tue Jun  1 09:21:27 2004 81[0]:   shared_secret_file = 
> 'static.key' Tue
> > Jun  1 09:21:27 2004 82[0]:   key_direction = 0
> > Tue Jun  1 09:21:27 2004 83[0]:   ciphername_defined = ENABLED
> > Tue Jun  1 09:21:27 2004 84[0]:   ciphername = 'BF-CBC'
> > Tue Jun  1 09:21:27 2004 85[0]:   authname_defined = ENABLED
> > Tue Jun  1 09:21:27 2004 86[0]:   authname = 'SHA1'
> > Tue Jun  1 09:21:27 2004 87[0]:   keysize = 0
> > Tue Jun  1 09:21:27 2004 88[0]:   replay = ENABLED
> > Tue Jun  1 09:21:27 2004 89[0]:   replay_window = 64
> > Tue Jun  1 09:21:27 2004 90[0]:   replay_time = 15
> > Tue Jun  1 09:21:27 2004 91[0]:   packet_id_file = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 92[0]:   use_iv = ENABLED
> > Tue Jun  1 09:21:27 2004 93[0]:   test_crypto = DISABLED
> > Tue Jun  1 09:21:27 2004 94[0]:   tls_server = DISABLED
> > Tue Jun  1 09:21:27 2004 95[0]:   tls_client = DISABLED
> > Tue Jun  1 09:21:27 2004 96[0]:   key_method = 1
> > Tue Jun  1 09:21:27 2004 97[0]:   ca_file = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 98[0]:   dh_file = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 99[0]:   cert_file = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 100[0]:   priv_key_file = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 101[0]:   cipher_list = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 102[0]:   tls_verify = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 103[0]:   tls_remote = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 104[0]:   crl_file = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 105[0]:   tls_timeout = 2
> > Tue Jun  1 09:21:27 2004 106[0]:   renegotiate_bytes = 0
> > Tue Jun  1 09:21:27 2004 107[0]:   renegotiate_packets = 0
> > Tue Jun  1 09:21:27 2004 108[0]:   renegotiate_seconds = 3600
> > Tue Jun  1 09:21:27 2004 109[0]:   handshake_window = 60
> > Tue Jun  1 09:21:27 2004 110[0]:   transition_window = 3600
> > Tue Jun  1 09:21:27 2004 111[0]:   single_session = DISABLED
> > Tue Jun  1 09:21:27 2004 112[0]:   tls_auth_file = '[UNDEF]'
> > Tue Jun  1 09:21:27 2004 113[0]: OpenVPN 1.6.0
> i386-pc-linux-gnu [SSL]
> > [LZO] [PTHREAD] built on May 10 2004 Tue Jun  1 09:21:27
> 2004 114[0]:
> > Static Encrypt: Cipher 'BF-CBC' initialized with 128 bit key Tue Jun  
> > 1 09:21:27 2004 115[0]: Static Encrypt: Using 160
> bit message
> > hash 'SHA1' for HMAC authentication
> > Tue Jun  1 09:21:27 2004 116[0]: Static Decrypt: Cipher 'BF-CBC' 
> > initialized with 128 bit key Tue Jun  1 09:21:27 2004 117[0]: Static 
> > Decrypt: Using 160
> bit message
> > hash 'SHA1' for HMAC authentication
> > Tue Jun  1 09:21:27 2004 118[0]: LZO compression initialized Tue Jun  
> > 1 09:21:27 2004 119[0]: TUN/TAP device tap0 opened Tue Jun  1 
> > 09:21:27 2004 120[0]: Data Channel MTU parms [
> L:1581 D:1400
> > EF:49 EB:19 ET:32 EL:0 ]
> > Tue Jun  1 09:21:27 2004 121[0]: Fragmentation MTU parms [
> L:1581 D:1400
> > EF:48 EB:19 ET:33 EL:0 ]
> > Tue Jun  1 09:21:27 2004 122[0]: Local Options String: 'V3,dev-type 
> > tap,link-mtu 1581,tun-mtu 1532,proto UDPv4,ifconfig 
> > ,comp-lzo,mtu-dynamic,cipher BF-CBC,auth SHA1,keysize 128,secret' 
> > Tue Jun  1 09:21:27 2004 123[0]: Expected Remote Options String: 
> > 'V3,dev-type tap,link-mtu 1581,tun-mtu 1532,proto UDPv4,ifconfig 
> > ,comp-lzo,mtu-dynamic,cipher BF-CBC,auth SHA1,keysize 128,secret' 
> > Tue Jun  1 09:21:27 2004 124[0]: Local Options hash
> (VER=V3): '11529904'
> > Tue Jun  1 09:21:27 2004 125[0]: Expected Remote Options
> hash (VER=V3):
> > '11529904'
> > Tue Jun  1 09:21:27 2004 126[0]: PTHREAD support initialized Tue Jun  
> > 1 09:21:27 2004 127[0]: UDPv4 link local (bound): 195.243.59.97:5000
> > Tue Jun  1 09:21:27 2004 128[0]: UDPv4 link remote: [undef]
> > Tue Jun  1 09:22:44 2004 129[0]: Peer Connection Initiated with
> > 213.7.100.82:5000
> > Tue Jun  1 09:22:47 2004 130[0]: WARNING: Actual Remote Options
> > ('V3,dev-type tap,link-mtu 1581,tun-mtu 1532,proto UDPv4,ifconfig
> > 192.168.1.0 255.255.255.0,comp-lzo,mtu-dynamic,cipher BF-CBC,auth
> > SHA1,keysize 128,secret') are inconsistent with Expected 
> Remote Options
> > ('V3,dev-type tap,link-mtu 1581,tun-mtu 1532,proto UDPv4,ifconfig 
> > ,comp-lzo,mtu-dynamic,cipher BF-CBC,auth SHA1,keysize
> 128,secret') Tue
> > Jun  1 09:23:37 2004 131[0]: Inactivity timeout (--ping-restart), 
> > restarting Tue Jun  1 09:23:37 2004 132[0]: Closing TCP/UDP socket
> > Tue Jun  1 09:23:37 2004 133[0]: Re-using pre-shared static key
> > Tue Jun  1 09:23:37 2004 134[0]: LZO compression initialized
> > Tue Jun  1 09:23:37 2004 135[0]: Preserving previous 
> TUN/TAP instance:
> > tap0
> > Tue Jun  1 09:23:37 2004 136[0]: Data Channel MTU parms [
> L:1581 D:1400
> > EF:49 EB:19 ET:32 EL:0 ]
> > Tue Jun  1 09:23:37 2004 137[0]: Fragmentation MTU parms [
> L:1581 D:1400
> > EF:48 EB:19 ET:33 EL:0 ]
> > Tue Jun  1 09:23:37 2004 138[0]: Local Options String: 'V3,dev-type 
> > tap,link-mtu 1581,tun-mtu 1532,proto UDPv4,ifconfig 
> > ,comp-lzo,mtu-dynamic,cipher BF-CBC,auth SHA1,keysize 128,secret' 
> > Tue Jun  1 09:23:37 2004 139[0]: Expected Remote Options String: 
> > 'V3,dev-type tap,link-mtu 1581,tun-mtu 1532,proto UDPv4,ifconfig 
> > ,comp-lzo,mtu-dynamic,cipher BF-CBC,auth SHA1,keysize 128,secret' 
> > Tue Jun  1 09:23:37 2004 140[0]: Local Options hash
> (VER=V3): '11529904'
> > Tue Jun  1 09:23:37 2004 141[0]: Expected Remote Options
> hash (VER=V3):
> > '11529904'
> > Tue Jun  1 09:23:37 2004 142[0]: UDPv4 link local (bound): 
> > 195.243.59.97:5000 Tue Jun  1 09:23:37 2004 143[0]: UDPv4 link 
> > remote: [undef]
> >
> >
> >
> > Client Config:
> >
> > remote 195.243.59.97
> > port 5000
> > dev tap
> > ifconfig 192.168.1.6 255.255.255.0
> >
> > fragment 1400
> > mssfix
> > secret static.key
> > ping 10
> > comp-lzo
> > verb 4
> > route 195.243.59.96 255.255.255.240 192.168.1.2
> > route-delay 4
> > tap-sleep 1
> >
> >
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> 
> 
> 
> 
> 
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