File Transfers to Remote Users
Windows Server Forum Index Windows Server
Server discussion on Windows platform.
 
 FAQFAQ   MemberlistMemberlist     RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 
Google
 
Web winserverhelp.com
File Transfers to Remote Users

 
Post new topic   Reply to topic    Windows Server Forum Index -> Live Communications Server
Author Message
Alma
Guest
Posted: Wed Oct 19, 2005 8:51 pm    Post subject: File Transfers to Remote Users Reply with quote
Hi folks,

I have the following scenario: LCS 2005 SP1 in a domain with an Access
Proxy for remote clients and ISA 2000 as the network firewall. I am able to
establish communication between an internal and an external user and IM, but
the problem is that I cannot do file transfers either way. Does somebody know
if file transfers are supported in this scenario and if so, what am I missing
to make it work? Thank you in advance.
Back to top
Jeremy Buch
Guest
Posted: Wed Oct 19, 2005 8:51 pm    Post subject: Re: File Transfers to Remote Users Reply with quote
FT doesn't work unless the clients can reach each other since media, FT and
app-sharing are all peer-to-peer.

--
Jeremy Buch (Microsoft)

This posting is provided "AS IS" with no warranties, and confers no rights.
Please do not send email to this address, post a reply to this newsgroup.

"Alma" <Alma@discussions.microsoft.com> wrote in message
news:D443E1DA-900F-40C3-85D6-99969A241C6C@microsoft.com...
Quote:
Hi folks,

I have the following scenario: LCS 2005 SP1 in a domain with an Access
Proxy for remote clients and ISA 2000 as the network firewall. I am able
to
establish communication between an internal and an external user and IM,
but
the problem is that I cannot do file transfers either way. Does somebody
know
if file transfers are supported in this scenario and if so, what am I
missing
to make it work? Thank you in advance.
Back to top
Alma
Guest
Posted: Wed Oct 19, 2005 8:51 pm    Post subject: Re: File Transfers to Remote Users Reply with quote
I've read that, but I don't know what they mean by that. Is it possible
with my current scenario? If so, how? I am also concerned about audio, video
and application sharing.

"Jeremy Buch" wrote:

Quote:
FT doesn't work unless the clients can reach each other since media, FT and
app-sharing are all peer-to-peer.

--
Jeremy Buch (Microsoft)

This posting is provided "AS IS" with no warranties, and confers no rights.
Please do not send email to this address, post a reply to this newsgroup.

"Alma" <Alma@discussions.microsoft.com> wrote in message
news:D443E1DA-900F-40C3-85D6-99969A241C6C@microsoft.com...
Hi folks,

I have the following scenario: LCS 2005 SP1 in a domain with an Access
Proxy for remote clients and ISA 2000 as the network firewall. I am able
to
establish communication between an internal and an external user and IM,
but
the problem is that I cannot do file transfers either way. Does somebody
know
if file transfers are supported in this scenario and if so, what am I
missing
to make it work? Thank you in advance.


Back to top
Jeremy Buch
Guest
Posted: Wed Oct 19, 2005 8:51 pm    Post subject: Re: File Transfers to Remote Users Reply with quote
I don't know how to answer the question any better than I already have other
than to provide additional definitions for the explanation.

All of this functionality (media = audio, video and app-sharing and file
transfer) all happen peer-to-peer (meaning that the communications happen
directly between the client machines once the request to have a session has
been passed over the SIP/LCS infrastructure). This means that firewalls are
preventing your clients from reaching each other - as long as these
firewalls are in place and aren't under uPNP control of one of the clients
you won't have this functionality across them.

You can look at http://www.microsoft.com/office/livecomm/ at some of the
partner solutions (like Jasomi, Radvision, etc) that provide SBC (Session
Border Controller) functionality to pass media (at least) across firewalls.

--
Jeremy Buch (Microsoft)

This posting is provided "AS IS" with no warranties, and confers no rights.
Please do not send email to this address, post a reply to this newsgroup.

"Alma" <Alma@discussions.microsoft.com> wrote in message
news:0F9C14FB-FEE5-433A-9BC6-C0B6E9AC4082@microsoft.com...
Quote:
I've read that, but I don't know what they mean by that. Is it possible
with my current scenario? If so, how? I am also concerned about audio,
video
and application sharing.

"Jeremy Buch" wrote:

FT doesn't work unless the clients can reach each other since media, FT
and
app-sharing are all peer-to-peer.

--
Jeremy Buch (Microsoft)

This posting is provided "AS IS" with no warranties, and confers no
rights.
Please do not send email to this address, post a reply to this newsgroup.

"Alma" <Alma@discussions.microsoft.com> wrote in message
news:D443E1DA-900F-40C3-85D6-99969A241C6C@microsoft.com...
Hi folks,

I have the following scenario: LCS 2005 SP1 in a domain with an
Access
Proxy for remote clients and ISA 2000 as the network firewall. I am
able
to
establish communication between an internal and an external user and
IM,
but
the problem is that I cannot do file transfers either way. Does
somebody
know
if file transfers are supported in this scenario and if so, what am I
missing
to make it work? Thank you in advance.


Back to top
Herr Lehmann
Guest
Posted: Thu Oct 20, 2005 8:51 am    Post subject: Re: File Transfers to Remote Users Reply with quote
My answer:

Ingate has also a solution for this problem. You can't use your ISA to
solve this. The only way is to install a SIP capable
firewall-proxy-combination, which is able to open the needed ports
dynamicly and performs the necessary SIP-NAT, instead or prallel of your
ISA server.

Or you can permanently open the UDP ports on your ISA and use a
Far-End-Nat solution. I think Jasomi does offer this.

My question:

If I don't care about security issues and I really want to use UPnP, then:
*UPnP could only open the ports for the media stream?
*But the NAT on the application layer can't be solved by UPnP?

Am I wrong?

My little opinion:

I think Microsoft should tell the people that SIP and NAT don't work
that easy. Especially by using no UDP and a client who is unable to make
use of STUN or some other protocols.

There are always the same questions about firewalls and conferencing.
And nowhere in the documentation - which is not good from my point of
view - is explained how the communication of RTP-data or appshare works
or that you have to buy expensive stuff to solve such problems.

You only find the important hints in the docs, if you know what you are
searching.

Thanks
Back to top
Bob Christian
Guest
Posted: Fri Oct 21, 2005 12:50 am    Post subject: Re: File Transfers to Remote Users Reply with quote
Just to add my $0.02

This may be of assistance.
http://bobchristian.blogspot.com/2005/07/windows-messenger-and-ports.html

Basically, in order for this to work, you have to be willing to punch some
holes in your firewall. That, and your firewall as well as the client
firewall/Cable/DSL router has to support uPNP.

Cheers,

Bob

--
Bob Christian II
MVP - LCS
http://bobchristian.blogspot.com - Blog



"Jeremy Buch" <jbuch@online.microsoft.com> wrote in message
news:u7xjuvO1FHA.3896@TK2MSFTNGP10.phx.gbl...
Quote:
I don't know how to answer the question any better than I already have
other than to provide additional definitions for the explanation.

All of this functionality (media = audio, video and app-sharing and file
transfer) all happen peer-to-peer (meaning that the communications happen
directly between the client machines once the request to have a session
has been passed over the SIP/LCS infrastructure). This means that
firewalls are preventing your clients from reaching each other - as long
as these firewalls are in place and aren't under uPNP control of one of
the clients you won't have this functionality across them.

You can look at http://www.microsoft.com/office/livecomm/ at some of the
partner solutions (like Jasomi, Radvision, etc) that provide SBC (Session
Border Controller) functionality to pass media (at least) across
firewalls.

--
Jeremy Buch (Microsoft)

This posting is provided "AS IS" with no warranties, and confers no
rights.
Please do not send email to this address, post a reply to this newsgroup.

"Alma" <Alma@discussions.microsoft.com> wrote in message
news:0F9C14FB-FEE5-433A-9BC6-C0B6E9AC4082@microsoft.com...
I've read that, but I don't know what they mean by that. Is it possible
with my current scenario? If so, how? I am also concerned about audio,
video
and application sharing.

"Jeremy Buch" wrote:

FT doesn't work unless the clients can reach each other since media, FT
and
app-sharing are all peer-to-peer.

--
Jeremy Buch (Microsoft)

This posting is provided "AS IS" with no warranties, and confers no
rights.
Please do not send email to this address, post a reply to this
newsgroup.

"Alma" <Alma@discussions.microsoft.com> wrote in message
news:D443E1DA-900F-40C3-85D6-99969A241C6C@microsoft.com...
Hi folks,

I have the following scenario: LCS 2005 SP1 in a domain with an
Access
Proxy for remote clients and ISA 2000 as the network firewall. I am
able
to
establish communication between an internal and an external user and
IM,
but
the problem is that I cannot do file transfers either way. Does
somebody
know
if file transfers are supported in this scenario and if so, what am I
missing
to make it work? Thank you in advance.




Back to top
Jeremy Buch
Guest
Posted: Wed Oct 26, 2005 8:51 pm    Post subject: Re: File Transfers to Remote Users Reply with quote
We're definitely working on making all of the peer-to-peer communications
for clients more capable of traversing NATs and firewalls as the product
continues, but without the reach scenarios that we enabled (in big ways) in
LCS 2005 and LCS 2005 SP1 (in particular), these concerns didn't exist for
the most part in the past.

As Herr mentions, perr-to-peer media and sharing has limitations now based
on network locale, but we'll be working to solve these problems in the
short-term future.

--
Jeremy Buch (Microsoft)

This posting is provided "AS IS" with no warranties, and confers no rights.
Please do not send email to this address, post a reply to this newsgroup.

"Herr Lehmann" <a.20.querfidelmub@spamgourmet.com> wrote in message
news:e9D8T0U1FHA.3180@TK2MSFTNGP14.phx.gbl...
Quote:
My answer:

Ingate has also a solution for this problem. You can't use your ISA to
solve this. The only way is to install a SIP capable
firewall-proxy-combination, which is able to open the needed ports
dynamicly and performs the necessary SIP-NAT, instead or prallel of your
ISA server.

Or you can permanently open the UDP ports on your ISA and use a
Far-End-Nat solution. I think Jasomi does offer this.

My question:

If I don't care about security issues and I really want to use UPnP, then:
*UPnP could only open the ports for the media stream?
*But the NAT on the application layer can't be solved by UPnP?

Am I wrong?

My little opinion:

I think Microsoft should tell the people that SIP and NAT don't work that
easy. Especially by using no UDP and a client who is unable to make use of
STUN or some other protocols.

There are always the same questions about firewalls and conferencing. And
nowhere in the documentation - which is not good from my point of view -
is explained how the communication of RTP-data or appshare works or that
you have to buy expensive stuff to solve such problems.

You only find the important hints in the docs, if you know what you are
searching.

Thanks
Back to top
 
Post new topic   Reply to topic    Windows Server Forum Index -> Live Communications Server All times are GMT
Page 1 of 1

 
 You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum




New Topics Powered by phpBB