<div dir="ltr">Hi all,<div><br></div><div>for my issue I could resolve it with adding a routing rule to all clients, because the VPN is not the default gateway for <a href="http://192.168.120.0/24">192.168.120.0/24</a> network...</div><div><br></div><div>Bernhard</div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-05-05 5:12 GMT+02:00 zhuyj <span dir="ltr"><<a href="mailto:mounter625@163.com" target="_blank">mounter625@163.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, Noel<br>
<br>
This is the output of forwarding on sun:<span class=""><br>
<br>
root@strongswan2:~# cat /proc/sys/net/ipv4/ip_forward<br>
1<br></span>
root@strongswan2:~# cat /proc/sys/net/ipv4/conf/<br>
all/ default/ eth0/ eth1/ eth2/ lo/<br>
root@strongswan2:~# cat /proc/sys/net/ipv4/conf/all/forwarding<br>
1<br>
root@strongswan2:~# cat /proc/sys/net/ipv4/conf/default/forwarding<br>
1<br>
root@strongswan2:~# cat /proc/sys/net/ipv4/conf/eth0/forwarding<br>
1<br>
root@strongswan2:~# cat /proc/sys/net/ipv4/conf/eth1/forwarding<br>
1<br>
root@strongswan2:~# cat /proc/sys/net/ipv4/conf/eth2/forwarding<br>
1<br>
<br>
When I run "ping 10.2.0.1" on moon, I run "ipsec statusall" on sun<br>
<br>
On moon:<br>
<br>
root@strongswan1:~# ping 10.2.0.1<span class=""><br>
PING 10.2.0.1 (10.2.0.1) 56(84) bytes of data.<br></span>
64 bytes from <a href="http://10.2.0.1" target="_blank">10.2.0.1</a>: icmp_seq=1 ttl=64 time=0.410 ms<br>
64 bytes from <a href="http://10.2.0.1" target="_blank">10.2.0.1</a>: icmp_seq=2 ttl=64 time=0.285 ms<br>
64 bytes from <a href="http://10.2.0.1" target="_blank">10.2.0.1</a>: icmp_seq=3 ttl=64 time=0.338 ms<br>
64 bytes from <a href="http://10.2.0.1" target="_blank">10.2.0.1</a>: icmp_seq=4 ttl=64 time=0.373 ms<br>
64 bytes from <a href="http://10.2.0.1" target="_blank">10.2.0.1</a>: icmp_seq=5 ttl=64 time=0.300 ms<br>
64 bytes from <a href="http://10.2.0.1" target="_blank">10.2.0.1</a>: icmp_seq=6 ttl=64 time=0.424 ms<br>
64 bytes from <a href="http://10.2.0.1" target="_blank">10.2.0.1</a>: icmp_seq=7 ttl=64 time=3.11 ms<br>
64 bytes from <a href="http://10.2.0.1" target="_blank">10.2.0.1</a>: icmp_seq=8 ttl=64 time=0.422 ms<br>
64 bytes from <a href="http://10.2.0.1" target="_blank">10.2.0.1</a>: icmp_seq=9 ttl=64 time=2.88 ms<br>
^C<span class=""><br>
--- 10.2.0.1 ping statistics ---<br></span>
9 packets transmitted, 9 received, 0% packet loss, time 7998ms<br>
rtt min/avg/max/mdev = 0.285/0.950/3.115/1.098 ms<br>
<br>
On Sun<br>
<br>
root@strongswan2:~# ipsec statusall<br>
Status of IKE charon daemon (strongSwan 5.1.2, Linux 3.19.0-15-generic, x86_64):<br>
uptime: 19 minutes, since May 05 10:36:17 2015<br>
malloc: sbrk 1486848, mmap 0, used 353968, free 1132880<br>
worker threads: 11 of 16 idle, 5/0/0/0 working, job queue: 0/0/0/0, scheduled: 2<br>
loaded plugins: charon test-vectors aes rc2 sha1 sha2 md4 md5 random nonce x509 revocation constraints pkcs1 pkcs7 pkcs8 pkcs12 pem openssl xcbc cmac hmac ctr ccm gcm attr kernel-netlink resolve socket-default stroke updown eap-identity addrblock<br>
Listening IP addresses:<br>
128.224.162.165<br>
11:2233:4455:6677:20c:29ff:fe70:bf88<br>
192.168.0.2<br>
11:2233:4455:6677:20c:29ff:fe70:bf92<br>
10.2.0.1<br>
11:2233:4455:6677:20c:29ff:fe70:bf9c<br>
Connections:<br>
net-net: 192.168.0.2...192.168.0.1 IKEv1<br>
net-net: local: [<a href="http://sun.strongswan.org" target="_blank">sun.strongswan.org</a>] uses pre-shared key authentication<br>
net-net: remote: [<a href="http://moon.strongswan.org" target="_blank">moon.strongswan.org</a>] uses pre-shared key authentication<br>
net-net: child: <a href="http://0.0.0.0/0" target="_blank">0.0.0.0/0</a> === <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a> TUNNEL<br>
Routed Connections:<br>
net-net{1}: ROUTED, TUNNEL<br>
net-net{1}: <a href="http://0.0.0.0/0" target="_blank">0.0.0.0/0</a> === <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a><br>
Security Associations (1 up, 0 connecting):<br>
net-net[1]: ESTABLISHED 19 minutes ago, 192.168.0.2[<a href="http://sun.strongswan.org" target="_blank">sun.strongswan.org</a>]...192.168.0.1[<a href="http://moon.strongswan.org" target="_blank">moon.strongswan.org</a>]<br>
net-net[1]: IKEv1 SPIs: 7233e70c634fa8aa_i eb8634d7b0b00874_r*, pre-shared key reauthentication in 37 minutes<br>
net-net[1]: IKE proposal: AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048<br>
net-net{1}: REKEYING, TUNNEL, expires in 5 minutes<br>
net-net{1}: <a href="http://10.2.0.0/16" target="_blank">10.2.0.0/16</a> === <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a><br>
net-net{1}: INSTALLED, TUNNEL, ESP SPIs: c043a424_i cf9ecbf3_o<br>
net-net{1}: AES_CBC_128/HMAC_SHA1_96, 420 bytes_i (5 pkts, 2s ago), 420 bytes_o (5 pkts, 2s ago), rekeying in 15 minutes <----I can see the input/output packets.<br>
net-net{1}: <a href="http://10.2.0.0/16" target="_blank">10.2.0.0/16</a> === <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a><br>
<br>
But when I run "ping 10.2.0.10" on Moon, I run "ipsec statusall" on Sun.<br>
<br>
On Moon:<br>
<br>
root@strongswan1:~# ping 10.2.0.10<span class=""><br>
PING 10.2.0.10 (10.2.0.10) 56(84) bytes of data.<br></span>
^C<span class=""><br>
--- 10.2.0.10 ping statistics ---<br></span>
13 packets transmitted, 0 received, 100% packet loss, time 12095ms<br>
<br>
On Sun:<br>
<br>
root@strongswan2:~# ipsec statusall<br>
Status of IKE charon daemon (strongSwan 5.1.2, Linux 3.19.0-15-generic, x86_64):<br>
uptime: 24 minutes, since May 05 10:36:18 2015<br>
malloc: sbrk 1486848, mmap 0, used 353968, free 1132880<br>
worker threads: 11 of 16 idle, 5/0/0/0 working, job queue: 0/0/0/0, scheduled: 2<br>
loaded plugins: charon test-vectors aes rc2 sha1 sha2 md4 md5 random nonce x509 revocation constraints pkcs1 pkcs7 pkcs8 pkcs12 pem openssl xcbc cmac hmac ctr ccm gcm attr kernel-netlink resolve socket-default stroke updown eap-identity addrblock<br>
Listening IP addresses:<br>
128.224.162.165<br>
11:2233:4455:6677:20c:29ff:fe70:bf88<br>
192.168.0.2<br>
11:2233:4455:6677:20c:29ff:fe70:bf92<br>
10.2.0.1<br>
11:2233:4455:6677:20c:29ff:fe70:bf9c<br>
Connections:<br>
net-net: 192.168.0.2...192.168.0.1 IKEv1<br>
net-net: local: [<a href="http://sun.strongswan.org" target="_blank">sun.strongswan.org</a>] uses pre-shared key authentication<br>
net-net: remote: [<a href="http://moon.strongswan.org" target="_blank">moon.strongswan.org</a>] uses pre-shared key authentication<br>
net-net: child: <a href="http://0.0.0.0/0" target="_blank">0.0.0.0/0</a> === <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a> TUNNEL<br>
Routed Connections:<br>
net-net{1}: ROUTED, TUNNEL<br>
net-net{1}: <a href="http://0.0.0.0/0" target="_blank">0.0.0.0/0</a> === <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a><br>
Security Associations (1 up, 0 connecting):<br>
net-net[1]: ESTABLISHED 24 minutes ago, 192.168.0.2[<a href="http://sun.strongswan.org" target="_blank">sun.strongswan.org</a>]...192.168.0.1[<a href="http://moon.strongswan.org" target="_blank">moon.strongswan.org</a>]<br>
net-net[1]: IKEv1 SPIs: 7233e70c634fa8aa_i eb8634d7b0b00874_r*, pre-shared key reauthentication in 32 minutes<br>
net-net[1]: IKE proposal: AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048<br>
net-net{1}: REKEYING, TUNNEL, expires in 33 seconds<br>
net-net{1}: <a href="http://10.2.0.0/16" target="_blank">10.2.0.0/16</a> === <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a><br>
net-net{1}: INSTALLED, TUNNEL, ESP SPIs: c043a424_i cf9ecbf3_o<br>
net-net{1}: AES_CBC_128/HMAC_SHA1_96, 1512 bytes_i (18 pkts, 1s ago), 672 bytes_o (8 pkts, 284s ago), rekeying in 10 minutes <----I only find input packages.<br>
net-net{1}: <a href="http://10.2.0.0/16" target="_blank">10.2.0.0/16</a> === <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a><br>
<br>
<br>
In a word, when I run "ping 10.2.0.1", I run "ipsec statusall", I can see input/output packages.<br>
<br>
When I run "ping 10.2.0.10", I run "ipsec statusall", I can only see input packages.<br>
I run "tcpdump -ni eth2 icmp", I can find the icmp reply packages.<br>
That is, the icmp reply packages do not pass vpn tunnel.<br>
<br>
I do not know why.<br>
<br>
Best Regards!<br>
<br>
Zhu Yanjun<div class="HOEnZb"><div class="h5"><br>
<br>
On 05/04/2015 06:39 PM, Noel Kuntze wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
-----BEGIN PGP SIGNED MESSAGE-----<br>
Hash: SHA256<br>
<br>
Hello Zhuyj,<br>
<br>
Please check that you enabled forwarding for the network devices<br>
that are involved in the forwarding of the packages.<br>
Also, please check the counters in the output of ipsec statusall to see,<br>
if the packets get decrypted. The counters should increment, when you send<br>
packets to the remote subnet.<br>
<br>
Mit freundlichen Grüßen/Regards,<br>
Noel Kuntze<br>
<br>
Fingerprint: 23CA BB60 2146 05E7 7278 6592 3839 298F 63EC 6658<br>
<br>
Am 04.05.2015 um 12:34 schrieb zhuyj:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi, Noel<br>
<br>
Thanks for your reply.<br>
I read carefully this link: <a href="https://wiki.strongswan.org/projects/strongswan/wiki/ForwardingAndSplitTunneling" target="_blank">https://wiki.strongswan.org/projects/strongswan/wiki/ForwardingAndSplitTunneling</a><br>
<br>
In this link, I think, the most important is: ip_forward and iptables.<br>
Now I show you the configurations on the sun:<br>
<br>
root@strongswan2:~# cat /proc/sys/net/ipv4/ip_forward<br>
1<br>
root@strongswan2:~# iptables-save<br>
# Generated by iptables-save v1.4.21 on Mon May 4 18:29:28 2015<br>
*nat<br>
:PREROUTING ACCEPT [93:14126]<br>
:INPUT ACCEPT [36:4578]<br>
:OUTPUT ACCEPT [0:0]<br>
:POSTROUTING ACCEPT [1:84]<br>
-A POSTROUTING -s <a href="http://10.0.0.0/8" target="_blank">10.0.0.0/8</a> -o eth1 -m policy --dir out --pol ipsec -j ACCEPT<br>
-A POSTROUTING -s <a href="http://10.0.0.0/8" target="_blank">10.0.0.0/8</a> -o eth1 -j MASQUERADE<br>
COMMIT<br>
# Completed on Mon May 4 18:29:28 2015<br>
# Generated by iptables-save v1.4.21 on Mon May 4 18:29:28 2015<br>
*filter<br>
:INPUT ACCEPT [2033:256543]<br>
:FORWARD ACCEPT [0:0]<br>
:OUTPUT ACCEPT [182:23858]<br>
-A FORWARD -s <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a> -d <a href="http://10.2.0.0/16" target="_blank">10.2.0.0/16</a> -i eth1 -m policy --dir in --pol ipsec --reqid 1 --proto esp -j ACCEPT<br>
-A FORWARD -s <a href="http://10.2.0.0/16" target="_blank">10.2.0.0/16</a> -d <a href="http://10.1.0.0/16" target="_blank">10.1.0.0/16</a> -o eth1 -m policy --dir out --pol ipsec --reqid 1 --proto esp -j ACCEPT<br>
COMMIT<br>
# Completed on Mon May 4 18:29:28 2015<br>
<br>
I think, ip forward feature is enabled in sun. And the iptables rules are inserted.<br>
But the result is the same.<br>
<br>
Any reply is appreciated.<br>
<br>
Thanks a lot.<br>
Zhu Yanjun<br>
<br>
On 05/04/2015 06:01 PM, Noel Kuntze wrote:<br>
Hello,<br>
<br>
Did you follow the guide for forwarding[1]?<br>
<br>
[1] <a href="https://wiki.strongswan.org/projects/strongswan/wiki/ForwardingAndSplitTunneling" target="_blank">https://wiki.strongswan.org/projects/strongswan/wiki/ForwardingAndSplitTunneling</a><br>
<br>
Mit freundlichen Grüßen/Regards,<br>
Noel Kuntze<br>
<br>
Fingerprint: 23CA BB60 2146 05E7 7278 6592 3839 298F 63EC 6658<br>
<br>
Am 04.05.2015 um 11:25 schrieb zhuyj:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi,<br>
<br>
Are you using psk or certificate to auth?<br>
<br>
Best Regards!<br>
Zhu Yanjun<br>
On 05/04/2015 05:18 PM, zhuyj wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi, Bernhard<br>
<br>
Your problem is the same with mine.<br>
<br>
Best Regards!<br>
Zhu Yanjun<br>
<br>
On 05/04/2015 05:00 PM, Bernhard Marx wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Zhu,<br>
<br>
no problem. I wish I would have :-)<br>
But moon and sun is connected via public networks?<br>
This is my scenario:<br>
<br>
<a href="http://192.168.2.0/24" target="_blank">192.168.2.0/24</a> <<a href="http://192.168.2.0/24" target="_blank">http://192.168.2.0/24</a>> <=> 192.168.2.1 hardware router xx.xx.xx.xx (public IP from provider) <=> Internet <=> public IP on eth0 192.168.120.125 <=> <a href="http://192.168.120.0/24" target="_blank">192.168.120.0/24</a> <<a href="http://192.168.120.0/24" target="_blank">http://192.168.120.0/24</a>> on eth1<br>
<br>
I can ping from 192.168.120.125 to 192.168.2.1 and vice versa - but I can not reach any devices in the subnet...<br>
<br>
Regards<br>
Bernhard<br>
<br>
<br>
2015-05-04 10:51 GMT+02:00 zhuyj <<a href="mailto:mounter625@163.com" target="_blank">mounter625@163.com</a> <mailto:<a href="mailto:mounter625@163.com" target="_blank">mounter625@163.com</a>>>:<br>
<br>
Sorry. I thought your solve this problem already.<br>
Do you think that it is related with psk or pubkey? I mean that strongswan can support auth-based certificate very well.<br>
Maybe there is something wrong with psk auth?<br>
<br>
Zhu Yanjun<br>
<br>
<br>
On 05/04/2015 04:45 PM, zhuyj wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi, Marx<br>
<br>
Please let me know how to solve this problem.<br>
<br>
Thanks a lot.<br>
Zhu Yanjun<br>
<br>
On 05/04/2015 04:22 PM, Bernhard Marx wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear Zhu,<br>
<br>
I think I have the issue... as send a request to mail list yesterday...<br>
<br>
Feedback I received is to check the routing of packets... but I cant identify the issue...<br>
<br>
Regards<br>
Bernhard<br>
<br>
2015-05-04 10:17 GMT+02:00 zhuyj <<a href="mailto:mounter625@163.com" target="_blank">mounter625@163.com</a> <mailto:<a href="mailto:mounter625@163.com" target="_blank">mounter625@163.com</a>>>:<br>
<br>
Hi, all<br>
<br>
I followed this link: <a href="http://www.strongswan.org/uml/testresults/ikev2/net2net-psk/" target="_blank">http://www.strongswan.org/uml/testresults/ikev2/net2net-psk/</a><br>
<br>
I configured 4 vmare hosts. The hosts are ubuntu14.04.<br>
<br>
The network topology is as below.<br>
<br>
10.1.0.10 <---->10.1.0.1 (moon) 192.168.0.1<----->192.168.0.2 (sun) 10.2.0.1<---->10.2.0.10<br>
<br>
strongswan is 5.1.2.<br>
<br>
>From this link: <a href="http://www.strongswan.org/uml/testresults/ikev2/net2net-psk/" target="_blank">http://www.strongswan.org/uml/testresults/ikev2/net2net-psk/</a>, after a vpn tunnel is created,<br>
I ran "ping 10.2.0.10" on clinet 10.1.0.10. But I can not get any reply from 10.2.0.10.<br>
<br>
I can find the icmp packets into moon. But moon will not forward these icmp packets.<br>
<br>
I exactly followed this link <a href="http://www.strongswan.org/uml/testresults/ikev2/net2net-psk/" target="_blank">http://www.strongswan.org/uml/testresults/ikev2/net2net-psk/</a>, but I can not get<br>
the same test result with this link.<br>
<br>
Does any one have the similar experience?<br>
<br>
Any reply is appreciated.<br>
<br>
Thanks a lot.<br>
Zhu Yanjun<br>
<br>
<br>
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</blockquote>
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</div></div></blockquote></div><br></div>