我有一台在 ReadyNAS 上运行的 Ubuntu 11.10 (oneiric) 服务器。我计划使用它通过路由器接受 ipsec+l2tp 连接。但是，连接在半途某处失败了。使用 Openswan IPsec U2.6.28/K3.0.0-12-generic 并尝试连接 iOS 5 iPhone 4S。
这是我能达到的程度：
身份验证日志：
Jan 19 13:54:11 ubuntu pluto[1990]: added connection description "PSK"
Jan 19 13:54:11 ubuntu pluto[1990]: added connection description "L2TP-PSK-NAT"
Jan 19 13:54:11 ubuntu pluto[1990]: added connection description "L2TP-PSK-noNAT"
Jan 19 13:54:11 ubuntu pluto[1990]: added connection description "passthrough-for-non-l2tp"
Jan 19 13:54:11 ubuntu pluto[1990]: listening for IKE messages
Jan 19 13:54:11 ubuntu pluto[1990]: NAT-Traversal: Trying new style NAT-T
Jan 19 13:54:11 ubuntu pluto[1990]: NAT-Traversal: ESPINUDP(1) setup failed for new style NAT-T family IPv4 (errno=19)
Jan 19 13:54:11 ubuntu pluto[1990]: NAT-Traversal: Trying old style NAT-T
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface eth0/eth0 192.168.19.99:500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface eth0/eth0 192.168.19.99:4500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface lo/lo 127.0.0.1:500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface lo/lo 127.0.0.1:4500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface lo/lo ::1:500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface eth0/eth0 2001:470:28:81:a00:27ff:*
Jan 19 13:54:11 ubuntu pluto[1990]: loading secrets from "/etc/ipsec.secrets"
Jan 19 13:54:11 ubuntu pluto[1990]: loading secrets from "/var/lib/openswan/ipsec.secrets.inc"
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [RFC 3947] method set to=109
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike] method set to=110
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [8f8d83826d246b6fc7a8a6a428c11de8]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [439b59f8ba676c4c7737ae22eab8f582]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [4d1e0e136deafa34c4f3ea9f02ec7285]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [80d0bb3def54565ee84645d4c85ce3ee]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [9909b64eed937c6573de52ace952fa6b]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-03] meth=108, but already using method 110
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02] meth=107, but already using method 110
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02_n] meth=106, but already using method 110
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [Dead Peer Detection]
Jan 19 14:04:31 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: responding to Main Mode from unknown peer 95.*.*.233
Jan 19 14:04:31 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: transition from state STATE_MAIN_R0 to state STATE_MAIN_R1
Jan 19 14:04:31 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: STATE_MAIN_R1: sent MR1, expecting MI2
Jan 19 14:04:33 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: NAT-Traversal: Result using draft-ietf-ipsec-nat-t-ike (MacOS X): both are NATed
Jan 19 14:04:33 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: transition from state STATE_MAIN_R1 to state STATE_MAIN_R2
Jan 19 14:04:33 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: STATE_MAIN_R2: sent MR2, expecting MI3
Jan 19 14:05:03 ubuntu pluto[1990]: ERROR: asynchronous network error report on eth0 (sport=500) for message to 95.*.*.233 port 500, complainant 95.*.*.233: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]
路由器配置 UDP 500、1701 和 4500 转发至 192.168.19.99（用于 ipsec 的 Ubuntu 服务器）。已启用 Ipsec 直通。
/etc/ipsec.conf
# /etc/ipsec.conf - Openswan IPsec configuration file
# This file: /usr/share/doc/openswan/ipsec.conf-sample
#
# Manual: ipsec.conf.5
version 2.0 # conforms to second version of ipsec.conf specification
config setup
nat_traversal=yes
#charonstart=yes
#plutostart=yes
protostack=netkey
conn PSK
authby=secret
forceencaps=yes
pfs=no
auto=add
keyingtries=3
dpdtimeout=60
dpdaction=clear
rekey=no
left=192.168.19.99
leftnexthop=192.168.19.1
leftprotoport=17/1701
right=%any
rightprotoport=17/%any
rightsubnet=vhost:%priv,%no
dpddelay=10
#dpdtimeout=10
#dpdaction=clear
include /etc/ipsec.d/l2tp-psk.conf
/etc/ipsec.d/l2tp-psk.conf
conn L2TP-PSK-NAT
rightsubnet=vhost:%priv
also=L2TP-PSK-noNAT
conn L2TP-PSK-noNAT
#
# PreSharedSecret needs to be specified in /etc/ipsec.secrets as
# YourIPAddress %any: "sharedsecret"
authby=secret
pfs=no
auto=add
keyingtries=3
# we cannot rekey for %any, let client rekey
rekey=no
# Set ikelifetime and keylife to same defaults windows has
ikelifetime=8h
keylife=1h
# l2tp-over-ipsec is transport mode
type=transport
#
left=192.168.19.99
#
# For updated Windows 2000/XP clients,
# to support old clients as well, use leftprotoport=17/%any
leftprotoport=17/1701
#
# The remote user.
#
right=%any
# Using the magic port of "0" means "any one single port". This is
# a work around required for Apple OSX clients that use a randomly
# high port, but propose "0" instead of their port.
rightprotoport=17/%any
dpddelay=10
dpdtimeout=10
dpdaction=clear
conn passthrough-for-non-l2tp
type=passthrough
left=192.168.19.99
leftnexthop=192.168.19.1
right=0.0.0.0
rightsubnet=0.0.0.0/0
auto=route
/etc/ipsec.secrets
include /var/lib/openswan/ipsec.secrets.inc
%any %any: PSK "my-key"
192.168.19.99 %any: PSK "my-key"
/etc/xl2tpd/xl2tpd.conf
[global]
debug network = yes
debug tunnel = yes
ipsec saref = no
listen-addr = 192.168.19.99
[lns default]
ip range = 192.168.19.201-192.168.19.220
local ip = 192.168.19.99
require chap = yes
refuse chap = no
refuse pap = no
require authentication = no
ppp debug = yes
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes
/etc/ppp/options.xl2tpd
pcp-accept-local
ipcp-accept-remote
noccp
auth
crtscts
idle 1800
mtu 1410
mru 1410
defaultroute
debug
lock
proxyarp
connect-delay 5000
ipcp-accept-local
/etc/ppp/chap-秘密
# Secrets for authentication using CHAP
# client server secret IP addresses
maciekish * my-secret *
* maciekish my-secret *
我似乎找不到问题所在。我当前所在的网络与其他主机的其他 ipsec 连接均可正常工作。
答案1
对于仍在寻找答案的任何人，我在 Ubuntu 10.04 上遇到了这个问题，10.04 的存储库中的 openswan 是 2.6.23，这给了我这个问题中提到的错误。修复此问题的快速简便的方法是升级到 2.6.38，为此您可以安装 Openswan 团队的 PPA。
说明如下 -https://launchpad.net/~openswan/+archive/ppa
...但您需要的三个步骤是 -
- sudo 添加 apt 存储库 ppa:openswan/ppa
- sudo apt-get 更新
- sudo apt-get 升级