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Samba and Vista with IPv6
1.
© Erion Ltd
2007 - All rights reserved Samba and Vista with IPv6 Dr David Holder CEng MIET MIEEE david.holder@erion.co.uk
2.
© Erion Ltd
2007 Quick Poll a Who is using IPv6? a Who is using IPv6 in a production environment? a Who wants to use IPv6 in Windows networks?
3.
© Erion Ltd
2007 Quick Comparison IPv4 vs IPv6 IPv6 IPv4 Address space Scarce Stateless auto-configuration No Yes IPSec standard No Yes IP mobility Impractical Yes Huge End to end connectivity No (NAT) Yes Network renumbering Difficult Easy Peer to peer applications Difficult Easy
4.
© Erion Ltd
2007 Motivations to Implement IPv6 a Political ` Government mandate a Geographical ` Address allocation ` Internet growth a Services ` IP mobility ` Peer to peer ` VoIP a Technical ` Peer to peer ` Mobility ` Security ` QoS a Organisational ` DoD ` Federal Government ` Microsoft a BusinessCase ` Market opportunities ` Cost reduction IPv6
5.
© Erion Ltd
2007 Vista Windows 2003 Windows 2000 Windows XP History of Windows and IPv6 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Microsoft Research Stack Technology Preview Developer Preview & Components Production Stack & Components Production Stack & Components Fully Integrated IPv6 Stack and Services + Firewall Teredo Peer to Peer SP1 Advanced Networking Pack Production Stack + Firewall Teredo and Peer to Peer SP2 Production Stack + Firewall Teredo and Peer to Peer SP1 IPv6 CIFS Works! Fully Integrated IPv6 Functionality
6.
© Erion Ltd
2007 IPv6 and Vista and Longhorn a Vista & Longhorn will introduce IPv6 into many networks a IPv6 by stealth ` Organisation implements Longhorn and/or Vista and uses IPv6 by default ` Transition mechanisms enable IPv6 on IPv4 only networks a IPv6 by design ` Organisation implements Longhorn and/or Vista as a part of strategic plan to move to IPv6
7.
© Erion Ltd
2007 Configuring IPv6 on Vista a Enabled by default a Preferred protocol a Configured automatically a Attempts to work even in IPv4 only networks ` Teredo ` ISATAP a Fully integrated into GUI
8.
© Erion Ltd
2007 IPv6 Addresses and Vista a Interfaces have manyIPv6 Addresses a Be aware of this when working with Samba Interface addresses ` Not EUI-64 by default ` Randomly generated Randomly generated client interface address Globally routable prefix Link-local
9.
© Erion Ltd
2007 NetBIOS NBT and IPv6 a NetBIOS does not work over IPv6 a Raw SMB over IPv6 works Port Protocol Description 137 UDP NBT Name Service 137 TCP NBT Name Service 138 UDP Datagram service 138 TCP Unused 139 UDP Unused 139 TCP Session Service 445 TCP Raw SMB over TCP/IP Will never work with IPv6 Will work with IPv6
10.
© Erion Ltd
2007 Name Resolution for IPv6 CIFS a NetBIOS name resolution is IPv4 only a Link-local Multicast Name Resolution (LLMNR) a DNS IPv4 Only IPv4 and IPv6 IPv4 and IPv6
11.
© Erion Ltd
2007 Link-local Multicast Name Resolution (LLMNR) a Performs name resolution without DNS a Essentially DNS over multicast a Works for IPv4 andIPv6 hosts a Uses multicast addresses ` IPv6FF02::1:3 ` IPv4224.0.0.252
12.
© Erion Ltd
2007 Linux/Unix and IPv6 a Current versions of Linux, BSD and Unix support IPv6 a Usually enabled by default a Majority of applications support IPv6
13.
© Erion Ltd
2007 Samba 3 and IPv6 a nmbd ` NetBIOS name resolution IPv4 only ` WINS IPv4 only ` NetBIOS also IPv4 only a smbd ` SMB protocol is network layer independent ` Requires name resolution ⌧ Can be provided by any IPv6 aware mechanism (DNS) ` Problem –stock smbdnot IPv6 enabled
14.
© Erion Ltd
2007 smbd over IPv6 using xinetd 1. Run smbd from IPv6 enabled internet service daemon 2. Create /etc/xinetd.d/smb 3. Start xinetd # Samba smb service service microsoft-ds { flags = REUSE IPV6 socket_type = stream wait = no user = root server = /usr/sbin/smbd log_on_failure += USERID disable = no } Enables IPv6 port 445 in /etc/services
15.
© Erion Ltd
2007 Samba 3 SMB over IPv6 (1) a On Samba box check for IPv6 SMB listener # netstat –inet6 –an | grep 445 tcp 0 0 :::445 :::*LISTEN a Works!
16.
© Erion Ltd
2007 Samba 3 SMB over IPv6 (2) a Connect from Vista using link local address and no DNS ` Literal DNS name converts to IPv6 addresses ` Hyphens replace colons in domain name a Works!
17.
© Erion Ltd
2007 Vista net use over IPv6 a Works from the command line too
18.
© Erion Ltd
2007 IPv6 and xinetd Gotcha You might be tempted to: a Enable IPV6 in xinetd a And remove IPv6 in the smbconfiguration a This will configure SMB over IPv4! ` Dual stack uses IPv4-mapped IPv6 addresses v6only = yes /etc/xinetd.conf flags = REUSE IPV6 /etc/xinetd.d/smb
19.
© Erion Ltd
2007 Samba 3 as IPv6 PDC a Samba 3 cannot be Active Directory domain controller a Vista onlycontacts Active Directory DC using IPv6 ` Vista cannot join or login to a Samba 3 domain over IPv6 a Share SMB/CIFS user authentication doeswork
20.
© Erion Ltd
2007 Samba 3 IPv6 Client Side a Support not complete in Samba 3 client code ` Quite a bit of work to do
21.
© Erion Ltd
2007 Linux CIFS IPv6 Client a “Linux CIFS Client Guide”by Steve French “IPv6 Support is planned for the future and is almost complete” a Now working as of SambaXP2007 Party! Steve French and David Holder – The first ever CIFS client connection over IPv6
22.
© Erion Ltd
2007 Samba 4 and IPv6 a Samba 4 code is not yet completely IPv6 clean a Server side now IPv6 clean as of this week, but ` IPv4 is hard-code in some places a You can hack Samba 4 server to work over IPv6 status = stream_setup_socket(event_context, model_ops, &ldap_stream_ops, "ipv4", address, &port, ldap_service);
23.
© Erion Ltd
2007 Samba 4 and IPv6 a Cannot run Samba 4 from Internet Super Daemon ` Samba4 smbdlistens on multiple ports ` Internet super daemons one port per daemon SWAT LDAP NetBIOS Kerberos Kerberos LDAPS SMB LDAP WINS WINS WINS NetBIOS NetBIOS NetBIOS Kerberos Kerberos smbd
24.
© Erion Ltd
2007 Samba 4 and IPv6 a Use IPv6 hack or port forwarder for Samba 4 over IPv6 ` Hacked version also listens on IPv4 (dual stack) a Works for mapping network drives and simple tasks a Vista failsto join domain over IPv6 ` Nodifference from IPv4
25.
© Erion Ltd
2007 Vista to Samba 4 over IPv6 a SMB over IPv6 works using: ` IPv6 hack ` Port forwarding
26.
© Erion Ltd
2007 Longhorn IPv6 and Samba a Longhorn fails to join Samba 4 domain a Longhorn can use SMB shares over IPv6 to Samba 3/4
27.
© Erion Ltd
2007 IPv6 and Samba Summary Version Role Works? Requirement Samba3 Raw SMB over IPv6 Yes None NT DC over IPv6 No No requirement CIFS Client Yes As of SambaXP 2007 AD Client over IPv6 No Required for Longhorn AD domains Samba4 Raw SMB over IPv6 Yes* Required. *only with hack AD Client over IPv6 No Required. Can be simulated by port forwarding. AD DC over IPv6 Yes* Required. *only with hack Can be simulated using port forwarding. IPv6 AD clients (Vista/Longhorn) cannot join a Samba4 domain. LLMNR No Required
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2007 Where Next with Samba and IPv6? a Samba with AD is required combination for IPv6 ` AD DC –Samba 4 a Samba 4 can be hacked to support IPv6 ` Server only a Samba4 server code is close to supporting IPv6 ` Needs changes to build and test Deployment of Vista and Longhorn will make Samba over IPv6 critical for some organisations
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2007 Questions?
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2007 Contact Details a Erion IPv6 Services: www.ipv6training.com www.ipv6consultancy.com www.erion.co.uk a Samba and Windows Integration www.erion.co.uk a David Holder d a v i d . h o l d e r @ e r i o n . c o . u k
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