J'installe un VPN utilisant strongSwan entre une instance Linux sur une instance Amazon EC2 et un réseau distant via son concentrateur Cisco. J'ai besoin de router les paquets de l'instance Linux elle-même une machine dans le sous-réseau distant.
La connexion est établie OK, mais aucun paquet n'est routé.
Je pense que je dois configurer des règles de routage spécifiques, comment dois-je procéder?
Logiciel
- Noyau Linux 3.5.0-41,
- Ubuntu 12.10,
- strongSwan 5.1.1 (construit à partir de la source),
- iptables - pas de règles.
Réseau
Local
- Amazon Elastic IP: 56.xxx
- IP LAN public: 172.xxx
- Sous-réseau virtuel local: 10.254.0.0/16
- IP virtuelle locale: 10.254.5.174
Éloigné
- IP publique du concentrateur Cisco: 62.xxx
- Sous-réseau distant: 10.192.0.0/12
Configuration
ipsec.conf
config setup
conn %default
keyexchange = ikev1
type = tunnel
ikelifetime = 86400
keylife = 28800
keyingtries = %forever
esp = 3des-sha
ike = 3des-md5-modp1024
forceencaps = yes
leftauth = psk
rightauth = psk
conn myconnection
left = 172.x.x.x
leftsubnet = 10.254.0.0/16
leftsourceip = 10.254.5.174
leftfirewall = yes
right = 62.x.x.x
rightsubnet = 10.192.0.0/12
auto = route
include /var/lib/strongswan/ipsec.conf.inc
strongswan.conf
charon {
cisco_unity = yes
install_routes = yes
install_virtual_ip = yes
threads = 16
plugins {
sql {
loglevel = -1
}
}
filelog {
/var/log/charon.log {
time_format = %b %e %T
default = 3
flush_line = yes
}
}
}
pluto {
}
libstrongswan {
}
ipsec statusall
# ipsec statusall
Status of IKE charon daemon (strongSwan 5.1.1, Linux 3.5.0-41-generic, x86_64):
uptime: 4 days, since Jan 22 14:24:08 2014
malloc: sbrk 270336, mmap 0, used 222672, free 47664
worker threads: 11 of 16 idle, 5/0/0/0 working, job queue: 0/0/0/0, scheduled: 3445
loaded plugins: charon aes des rc2 sha1 sha2 md5 random nonce x509 revocation constraints pubkey pkcs1 pkcs7 pkcs8 pkcs12 pgp dnskey sshkey pem fips-prf gmp xcbc cmac hmac attr kernel-netlink resolve socket-default stroke updown xauth-generic
Listening IP addresses:
172.x.x.x
54.x.x.x
Connections:
smsbrick: 172.x.x.x...62.x.x.x IKEv1
smsbrick: local: [172.x.x.x] uses pre-shared key authentication
smsbrick: remote: [62.x.x.x] uses pre-shared key authentication
smsbrick: child: 10.254.0.0/16 === 10.192.0.0/12 TUNNEL
Routed Connections:
smsbrick{1}: ROUTED, TUNNEL
smsbrick{1}: 10.254.0.0/16 === 10.192.0.0/12
Security Associations (1 up, 0 connecting):
smsbrick[8150]: ESTABLISHED 1 second ago, 172.x.x.x[172.x.x.x]...62.x.x.x[62.x.x.x]
smsbrick[8150]: IKEv1 SPIs: xxxxxxxxxxxxxx_i* xxxxxxxxxxxxx_r, pre-shared key reauthentication in 23 hours
smsbrick[8150]: IKE proposal: 3DES_CBC/HMAC_MD5_96/PRF_HMAC_MD5/MODP_1024
smsbrick[8150]: Tasks queued: QUICK_MODE
smsbrick[8150]: Tasks active: MODE_CONFIG
ip xfrm
# ip xfrm policy
src 10.192.0.0/12 dst 10.254.0.0/16
dir fwd priority 3987
tmpl src 62.x.x.x dst 172.x.x.x
proto esp reqid 1 mode tunnel
src 10.192.0.0/12 dst 10.254.0.0/16
dir in priority 3987
tmpl src 62.x.x.x dst 172.x.x.x
proto esp reqid 1 mode tunnel
src 10.254.0.0/16 dst 10.192.0.0/12
dir out priority 3987
tmpl src 172.x.x.x dst 62.x.x.x
proto esp reqid 1 mode tunnel
src 0.0.0.0/0 dst 0.0.0.0/0
socket in priority 0
src 0.0.0.0/0 dst 0.0.0.0/0
socket out priority 0
src 0.0.0.0/0 dst 0.0.0.0/0
socket in priority 0
src 0.0.0.0/0 dst 0.0.0.0/0
socket out priority 0
src ::/0 dst ::/0
socket in priority 0
src ::/0 dst ::/0
socket out priority 0
src ::/0 dst ::/0
socket in priority 0
src ::/0 dst ::/0
socket out priority 0