[strongSwan] DHCP!
Thor Simon
Thor.Simon at twosigma.com
Thu May 3 22:31:33 CEST 2018
If you would like to supply addresses to your clients via IKE Mode Config, the DHCP plugin is one means by which StrongSwan can obtain those addresses.
-----Original Message-----
From: Users <users-bounces at lists.strongswan.org> On Behalf Of Christian Salway
Sent: Thursday, May 3, 2018 4:27 PM
To: Noel Kuntze <noel.kuntze+strongswan-users-ml at thermi.consulting>
Cc: users at lists.strongswan.org
Subject: Re: [strongSwan] DHCP!
So what is the purpose of the dhcp plugin then?
> On 3 May 2018, at 18:52, Noel Kuntze <noel.kuntze+strongswan-users-ml at thermi.consulting> wrote:
>
> The dhcp plugin or generally strongSwan has nothing to do with that.
> Windows itself is supposed to make a DHCP request over the established tunnel. Check what it sends with wireshark or tcpdump.
> Use the information from the CorrectTrafficDump[1] page.
>
>
>
> [1]
> https://secure-web.cisco.com/1_h6MioB9kRbPuO5b1NQmVwz1nqJkemt__rVJDcQQ
> GwkgjLSHN9I9JoBZBEcAqjKD_5JA0ERTo8_VfvEFeKJB8dSX07lcvTeBS3AUT65L9TlZde
> LnjMQ1tT7u2fooVfDiBZH_KQa--YuV0DEqLoHuthVgHmdogOWD5qk7juajhfoBk0ac4NP3
> y6GFGZMIpHdgAhdWxnlBSVRIhm2wqLbHNCjnnjo6yF3vAem0DrMfRD0Hh2JIgJNpGOQTSO
> cOV1Td/https%3A%2F%2Fwiki.strongswan.org%2Fprojects%2Fstrongswan%2Fwik
> i%2FCorrectTrafficDump
>
> On 03.05.2018 18:58, Christian Salway wrote:
>> I have noticed that Windows 10 is not asking for DHCP though
>>
>> May 3 16:55:37 ip-10-0-5-202 charon-systemd[30549]: parsed IKE_AUTH
>> request 1 [ IDi CERTREQ N(MOBIKE_SUP) CPRQ(ADDR DNS NBNS SRV ADDR6
>> DNS6 SRV6) SA TSi TSr ]
>>
>>
>>
>> Where as OSX is
>>
>> May 3 16:53:07 ip-10-0-5-202 charon-systemd[30505]: parsed IKE_AUTH
>> request 1 [ IDi N(INIT_CONTACT) N(MOBIKE_SUP) IDr CPRQ(ADDR *DHCP*
>> DNS MASK ADDR6 DHCP6 DNS6 (25)) N(ESP_TFC_PAD_N) N(NON_FIRST_FRAG) SA
>> TSi TSr ]
>>
>>
>>
>> <http://secure-web.cisco.com/120V9LfMi3vtxE-5KjUz6POqa_DjZsebmPiWu-gf
>> xO92VdCKYyGXPwa2b45TgV8ioDiU8hQxLJulX_e8gv6s2_huFqoLv6i8Dsb2GCAdc-eF8
>> XffvE55b-hODoMWYVgaZ1HxjZMxgoE_FIm4W8_fcqb400nhU2NJDK0g-xmbELy5ofDZm2
>> XJs1LOU4R8zJk0q861JtaOeyUMofB9Xcgb6HVJHloCiwQHD0hffI6sHpep-sGzj5Ja4Cj
>> -hWoPlVrbgdshHYrh9sAnjKiyiz0M0RA/http%3A%2F%2Fwww.naimuri.com>
>>
>>> On 3 May 2018, at 17:34, Christian Salway <christian.salway at naimuri.com <mailto:christian.salway at naimuri.com>> wrote:
>>>
>>> Hi,
>>>
>>> I've been trying to fix the (lack of) routing passed on to Windows 10 by trying the DHCP answer found at *Split-routing-on-Windows-10-and-Windows-10-Mobile* [1] but I cant get the DHCP to work. strongSwan doesnt make any requests to it.
>>>
>>> I have installed and configured dnsmasq with just the options in the support guide and dnsmasq is listening on tcp port 53 (DNS) and 67 (DHCP).
>>>
>>> I have rebuilt strongswan with dhcp support.
>>>
>>>
>>> *$ /etc/dnsmasq.conf*
>>> dhcp-vendorclass=set:msipsec,MSFT 5.0
>>> dhcp-range=tag:msipsec,192.168.103.0,static
>>> dhcp-option=tag:msipsec,6
>>> dhcp-option=tag:msipsec,249, 0.0.0.0/1,0.0.0.0, 128.0.0.0/1,0.0.0.0
>>>
>>> *$ netstat -tunlp*
>>> Active Internet connections (only servers)
>>> Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
>>> *tcp 0 0 0.0.0.0:53 0.0.0.0:* LISTEN 29951/dnsmasq *
>>> tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1143/sshd
>>> tcp6 0 0 :::53 :::* LISTEN 29951/dnsmasq
>>> tcp6 0 0 :::22 :::* LISTEN 1143/sshd
>>> udp 0 0 0.0.0.0:4500 0.0.0.0:* 30147/charon-system
>>> udp 0 0 0.0.0.0:500 0.0.0.0:* 30147/charon-system
>>> udp 0 0 0.0.0.0:53 0.0.0.0:* 29951/dnsmasq
>>> *udp 0 0 0.0.0.0:67 0.0.0.0:* 29951/dnsmasq *
>>> udp 0 0 0.0.0.0:68 0.0.0.0:* 30147/charon-system
>>> udp 0 0 0.0.0.0:68 0.0.0.0:* 1005/dhclient
>>> udp6 0 0 :::4500 :::* 30147/charon-system
>>> udp6 0 0 :::500 :::* 30147/charon-system
>>> udp6 0 0 :::53 :::* 29951/dnsmasq
>>>
>>>
>>> *$ swanctl --stats*
>>> ...
>>> loaded plugins: charon-systemd charon-systemd aes openssl des rc2
>>> sha2 sha1 md4 md5 mgf1 random nonce x509 revocation constraints
>>> pubkey pkcs1 pkcs7 pkcs8 pkcs12 pgp dnskey sshkey pem fips-prf gmp
>>> curve25519 xcbc cmac hmac gcm curl attr kernel-netlink resolve
>>> socket-default vici updown eap-identity eap-mschapv2 eap-dynamic
>>> eap-tls xauth-generic *dhcp*
>>>
>>> *$ /etc/strongswan.d/charon/dhcp.conf * dhcp {
>>> force_server_address = yes
>>> load = yes
>>> server = 10.0.15.255
>>> }
>>>
>>> *$ /etc/swanctl/conf.d/policy.conf* connections {
>>> clients {
>>> version = 2
>>> send_cert = always
>>> encap = yes
>>> unique = replace
>>> proposals = aes256-sha256-prfsha256-modp2048-modp1024
>>> pools = pool1
>>> local {
>>> id = vpnserver
>>> certs = vpnserver.crt
>>> }
>>> remote {
>>> auth = eap-mschapv2
>>> eap_id = %any
>>> }
>>> children {
>>> net {
>>> local_ts = 10.0.0.0/20
>>> }
>>> }
>>> }
>>> }
>>> pools {
>>> pool1 {
>>> addrs = 172.16.0.0/12
>>> subnet = 10.0.0.0/18
>>> dhcp = 10.0.5.202
>>> }
>>> }
>>>
>>> The route I would expect to see on Windows 10 should simulate
>>>
>>> *route ADD 10.0.0.0 MASK 255.255.240.0 172.16.0.X*
>>>
>>>
>>> *The connection log *
>>>
>>> May 3 16:27:58 ip-10-0-5-202 charon-systemd[30250]: IKE_SA rsa[1]
>>> established between
>>> 10.0.5.202[vpnserver1]...148.252.225.26[192.168.1.31]
>>> May 3 16:27:58 ip-10-0-5-202 charon-systemd[30250]: scheduling
>>> rekeying in 13750s May 3 16:27:58 ip-10-0-5-202
>>> charon-systemd[30250]: maximum IKE_SA lifetime 15190s May 3
>>> 16:27:58 ip-10-0-5-202 charon-systemd[30250]: peer requested virtual IP %any May 3 16:27:58 ip-10-0-5-202 charon-systemd[30250]: assigning new lease to 'christian.salway.naimuri.com <http://secure-web.cisco.com/1Yi0OeQn6DNH6kLciMwZ265LSqlcOKczgBrZjGcCgMMFtREQdb-V2MnYt3GbmmvPGy3JgBPwGLu1PILj00Io081AvpITV2pjxWsQq1fkOhowVXrcB_blZvthUm09PVCTV58uHkYA-R8zQSHcxsXaqa7w8yNwPap972zOB3hXWdKOKGEY1Kf1LhkEi-zv9GiBHzGU1oF10bltHd7DJGo-OP1Xp4xmTe1kguxd_bdU2YLbZp8du70LE1JsLDjq05qhs/http%3A%2F%2Fchristian.salway.naimuri.com%2F>'
>>> May 3 16:27:58 ip-10-0-5-202 charon-systemd[30250]: assigning virtual IP 172.16.0.1 to peer 'christian.salway.naimuri.com <http://secure-web.cisco.com/1Yi0OeQn6DNH6kLciMwZ265LSqlcOKczgBrZjGcCgMMFtREQdb-V2MnYt3GbmmvPGy3JgBPwGLu1PILj00Io081AvpITV2pjxWsQq1fkOhowVXrcB_blZvthUm09PVCTV58uHkYA-R8zQSHcxsXaqa7w8yNwPap972zOB3hXWdKOKGEY1Kf1LhkEi-zv9GiBHzGU1oF10bltHd7DJGo-OP1Xp4xmTe1kguxd_bdU2YLbZp8du70LE1JsLDjq05qhs/http%3A%2F%2Fchristian.salway.naimuri.com%2F>'
>>> May 3 16:27:58 ip-10-0-5-202 charon-systemd[30250]: peer requested
>>> virtual IP %any6 May 3 16:27:58 ip-10-0-5-202 charon-systemd[30250]: no virtual IP found for %any6 requested by 'christian.salway.naimuri.com <http://secure-web.cisco.com/1Yi0OeQn6DNH6kLciMwZ265LSqlcOKczgBrZjGcCgMMFtREQdb-V2MnYt3GbmmvPGy3JgBPwGLu1PILj00Io081AvpITV2pjxWsQq1fkOhowVXrcB_blZvthUm09PVCTV58uHkYA-R8zQSHcxsXaqa7w8yNwPap972zOB3hXWdKOKGEY1Kf1LhkEi-zv9GiBHzGU1oF10bltHd7DJGo-OP1Xp4xmTe1kguxd_bdU2YLbZp8du70LE1JsLDjq05qhs/http%3A%2F%2Fchristian.salway.naimuri.com%2F>'
>>> May 3 16:27:58 ip-10-0-5-202 charon-systemd[30250]: CHILD_SA net{1}
>>> established with SPIs cac7b9af_i 02fc4cb2_o and TS 10.0.0.0/18 ===
>>> 172.16.0.1/32 May 3 16:27:58 ip-10-0-5-202 charon-systemd[30250]:
>>> generating IKE_AUTH response 5 [ AUTH CPRP(ADDR SUBNET DHCP) SA TSi
>>> TSr N(MOBIKE_SUP) N(NO_ADD_ADDR) ]
>>>
>>>
>>> [1]
>>> https://secure-web.cisco.com/1SoYE_B8oPkYsHXCWLgk0vAhDMGerHeeyGnWSju
>>> 1ZBYAEuGwEt7dkOyCtxw_U-aLXmfzKLajEyinghQSbAqqArS_s29AErnnlZ-q1Jfgn4n
>>> wq8SM3Bt2RAj_BhvKXfrW8GuHzZprojk9tKyTuEL-y1AjSjoNBhrXX5FAlrWmmSyge2u
>>> ybEOiZUIhHM7RTGfDV4aQOeNDbARZZx2OMC28hgLxLlDIWxC8nGdetSb6Jd9Fh3E8aNg
>>> vd7ZpGh7Vs3inJ/https%3A%2F%2Fwiki.strongswan.org%2Fprojects%2Fstrong
>>> swan%2Fwiki%2FWindows7#Split-routing-on-Windows-10-and-Windows-10-Mo
>>> bile
>>
More information about the Users
mailing list