Good morning Libreswan-folks! I cannot understand, why my libreswan-VPN does not work correctly. It connects but, I get no data through - no ping, no ssh.
Before I start my vpn the routing is like this: $ ip ro default via 192.168.42.129 dev enp0s12u2 proto dhcp metric 100 169.254.0.0/16 dev enp0s12u2 scope link metric 1000 192.168.42.0/24 dev enp0s12u2 proto kernel scope link src 192.168.42.91 metric 100 192.168.42.129 dev enp0s12u2 scope link for explanation: The client is a roadwarrior, in this case my DHCP-server/router is 192.168.42.129 and my local address is 192.168.42.91 Now I start my vpn with following configuration config setup protostack = netkey conn Office1 type = tunnel authby = secret left = 192.168.42.91 leftid = @office_vpn_admin leftsubnet = 192.168.92.0/24 leftvti = 192.168.92.234/24 right = some-domain.tld rightid = @Office keyexchange = ike ike = aes256-sha2;dh14 phase2 = esp phase2alg = aes256-sha2;dh14 sha2_truncbug = yes ikelifetime = 4h keylife = 8h auto = route aggrmode = yes vti-interface = vti0 vti-routing = yes mark = 5/0xffffffff The connection show up: 003 "Office1": IKEv1 Aggressive Mode with PSK is vulnerable to dictionary attacks and is cracked on large scale by TLA's 002 "Office1" #17: initiating Aggressive Mode 112 "Office1" #17: STATE_AGGR_I1: initiate 010 "Office1" #17: STATE_AGGR_I1: retransmission; will wait 0.5 seconds for response 010 "Office1" #17: STATE_AGGR_I1: retransmission; will wait 1 seconds for response 003 "Office1" #17: ignoring unknown Vendor ID payload [0048e2270bea8395ed778d343cc2a076] 003 "Office1" #17: ignoring unknown Vendor ID payload [5cbeb399eb835a7d7a2eb495905db061] 003 "Office1" #17: ignoring unknown Vendor ID payload [810fa565f8ab14369105d706fbd57279] 002 "Office1" #17: Peer ID is ID_FQDN: '@Office' 002 "Office1" #17: WARNING: connection Office1 PSK length of 13 bytes is too short for sha2_256 PRF in FIPS mode (16 bytes required) 002 "Office1" #17: Peer ID is ID_FQDN: '@Office' 004 "Office1" #17: STATE_AGGR_I2: sent AI2, ISAKMP SA established {auth=PRESHARED_KEY cipher=aes_256 integ=sha2_256 group=MODP2048} 002 "Office1" #18: initiating Quick Mode PSK+ENCRYPT+TUNNEL+PFS+UP+AGGRESSIVE+IKEV1_ALLOW+IKEV2_ALLOW+SAREF_TRACK+IKE_FRAG_ALLOW+ESN_NO {using isakmp#17 msgid:d10ecd44 proposal=AES_CBC_256-HMAC_SHA2_256_128-MODP2048 pfsgroup=MODP2048} 117 "Office1" #18: STATE_QUICK_I1: initiate 010 "Office1" #18: STATE_QUICK_I1: retransmission; will wait 0.5 seconds for response 002 "Office1" #18: prepare-client output: net.ipv4.conf.vti0.disable_policy = 1 002 "Office1" #18: prepare-client output: net.ipv4.conf.vti0.rp_filter = 0 002 "Office1" #18: prepare-client output: net.ipv4.conf.vti0.forwarding = 1 002 "Office1" #18: route-client output: done ip route 004 "Office1" #18: STATE_QUICK_I2: sent QI2, IPsec SA established tunnel mode {ESP/NAT=>0x63b84f91 <0x9be80fa8 xfrm=AES_CBC_256-HMAC_SHA2_256_128 NATOA=none NATD=xx.yyy.zzz.vv:4500 DPD=passive} routing then shows $ ip ro default via 192.168.42.129 dev enp0s12u2 proto dhcp metric 100 xx.yyy.zzz.vv dev vti0 scope link 169.254.0.0/16 dev enp0s12u2 scope link metric 1000 192.168.42.0/24 dev enp0s12u2 proto kernel scope link src 192.168.42.91 metric 100 192.168.42.129 dev enp0s12u2 scope link 192.168.92.0/24 dev vti0 proto kernel scope link src 192.168.92.234 $ route Kernel-IP-Routentabelle Ziel Router Genmask Flags Metric Ref Use Iface default _gateway 0.0.0.0 UG 100 0 0 enp0s12u2 pXXXXaXXX.dip0. 0.0.0.0 255.255.255.255 UH 0 0 0 vti0 link-local 0.0.0.0 255.255.0.0 U 1000 0 0 enp0s12u2 192.168.42.0 0.0.0.0 255.255.255.0 U 100 0 0 enp0s12u2 _gateway 0.0.0.0 255.255.255.255 UH 0 0 0 enp0s12u2 192.168.92.0 0.0.0.0 255.255.255.0 U 0 0 0 vti0 $ ping 192.168.92.10 PING 192.168.92.10 (192.168.92.10) 56(84) bytes of data. >From 192.168.92.234 icmp_seq=1 Destination Host Unreachable Again I ask you for help. I cannot understand why this will not work. Maybe this is special to ubuntu/debian-distro? -- Best regards Johannes C. Schulz „*Programmer - n. [proh-gram-er] an organism that turns caffeine and pizza into software“*
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