[strongSwan] DHCP!
Christian Salway
christian.salway at naimuri.com
Thu May 3 22:39:49 CEST 2018
@Thor - ok. so in your professional capacity, would you say there is no way strongSwan can fix the Windows 10 issue of not adding a route when it connects?
<http://www.naimuri.com/>
> On 3 May 2018, at 21:31, Thor Simon <Thor.Simon at twosigma.com> wrote:
>
> 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
>>>
>
>
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