在我的 Debian 服务器上，我为 Cisco IPSec VPN 设置了 racoon 守护进程 (1:0.8.0-14)，使用证书进行身份验证。我的 racoon.conf 如下：
log info;
path certificate "/etc/racoon/certs";
listen {
isakmp $SERVER_IP_HERE [500];
isakmp_natt $SERVER_IP_HERE [4500];
}
timer {
natt_keepalive 10 sec;
}
remote anonymous {
lifetime time 24 hours;
proposal_check obey;
passive on;
exchange_mode aggressive,main;
my_identifier asn1dn;
peers_identifier asn1dn;
verify_identifier on;
certificate_type x509 "cert_name.crt" "key_name.key";
ca_type x509 "ca.crt";
mode_cfg on;
verify_cert on;
ike_frag on;
generate_policy on;
nat_traversal on;
dpd_delay 20;
proposal {
encryption_algorithm aes;
hash_algorithm sha1;
authentication_method xauth_rsa_server;
dh_group modp1024;
}
}
mode_cfg {
conf_source local;
auth_source system;
auth_throttle 3;
save_passwd on;
dns4 8.8.8.8;
network4 $SOME_LAN_SUBNET;
netmask4 255.255.255.0;
pool_size 128;
}
sainfo anonymous {
pfs_group 2;
lifetime time 24 hour;
encryption_algorithm aes;
authentication_algorithm hmac_sha1;
compression_algorithm deflate;
}
我这里没有使用 PSK 身份验证。使用 iPhone 配置实用程序，我已将所有必需的证书上传到 iPhone 并按需设置 VPN。除了一件事之外，一切都运行正常：iPhone 拒绝保存 VPN 密码，无论save_passwd on;racoon 配置文件中如何。与 iPhone 的行为相反，Mac OS X 10.8.2 在保存密码时没有问题。我检查了 iPhone 日志文件并发现以下内容：
racoon[151] <Notice>: >>>>> phase change status = phase 1 established
configd[50] <Notice>: IPSec Network Configuration started.
configd[50] <Notice>: IPSec Network Configuration: INTERNAL-IP4-ADDRESS = $SUBNET_IP_HERE.
configd[50] <Notice>: IPSec Network Configuration: INTERNAL-IP4-MASK = 255.255.255.0.
configd[50] <Notice>: IPSec Network Configuration: SAVE-PASSWORD = 0.
configd[50] <Notice>: IPSec Network Configuration: INTERNAL-IP4-DNS = 8.8.8.8.
configd[50] <Notice>: IPSec Network Configuration: BANNER = .
configd[50] <Notice>: IPSec Network Configuration: DEF-DOMAIN = .
configd[50] <Notice>: IPSec Network Configuration: DEFAULT-ROUTE = local-address $SUBNET_IP_HERE/32.
configd[50] <Notice>: IPSec Phase2 starting.
configd[50] <Notice>: IPSec Network Configuration established.
configd[50] <Notice>: IPSec Phase1 established.
请注意包含 的 IPSec 网络配置消息SAVE-PASSWORD = 0.。这是服务器上的 racoon 守护程序中的错误，还是 iPhone（iOS 版本为 6.0.1 (10A523)）的错误，或者是我遗漏了什么？如何让 iPhone 记住 IPSec VPN 密码？