Yes, that's right. But the key here is that it only requires outbound access on 3389, not inbound. So, it will work with virtually all home networks and routers. Corporate networks may limit outbound access. It still doesn't explain "how" they do it. I looked inside the "invitation" file that gets attached if you email the assistance request, and it references very high UDP port numbers. So, I am assuming it is using some type of mediation server or UDP tunneling technology.
evets dranem wrote: >B. Scott Smith wrote: > > > >>I'm not exactly sure how they do it, I suppose they must use a mediation >>server. >>Whereas straight RDP requires the "supported" PC to have port 3389 open, >>the Remote Assistance only requires outbound access to 3389 from both >>PC's. While this may be blocked by some corporate firewalls, standard >>home-based routers will work fine as is. At least it does for me... >> >>James Weatherall wrote: >> >> >> >> >> >>>Scott, >>> >>>How does this eliminate firewall issues? >>> >>>Regards, >>> >>>Wez @ RealVNC Ltd. >>> >>> >>> >>> >>>>-----Original Message----- >>>>From: [EMAIL PROTECTED] >>>>[mailto:[EMAIL PROTECTED] On Behalf Of B. Scott Smith >>>>Sent: 18 April 2005 16:35 >>>>To: Haggai Back >>>>Cc: [email protected] >>>>Subject: Re: step by step >>>> >>>>If both computers are XP, and you would like your parents to request >>>>your help, then I would recommend using the built-in Remote >>>>Assistance >>>>feature of XP. Your parents would simply email you a request, and you >>>>will be able to immediately take control of the desktop. >>>> >>>> >>>>http://www.microsoft.com/technet/prodtechnol/winxppro/maintain >>>>/rmassist.mspx >>>> >>>>This will eliminate firewall issues and allow you to chat while >>>>controlling the remote PC. >>>> >>>>Haggai Back wrote: >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>>>Hello, >>>>>I've read a lot of questions and answers about that, but >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>still could not apply: >>>> >>>> >>>> >>>> >>>> >>>> >>>>>I want to connect my parent's computer via Internet. >>>>>We both using XP >>>>>I have their ip as: xxx.xx.xxx.xxx,xxx.xx.xx.xx >>>>>Where should I write the ip? >>>>>Which ip? The first/second or both? >>>>>Do we need to open server/client before connecting >>>>> >>>>> >>>>> >*From Microsoft technet quoted page link above ;-P > >Note*: If the person who is being helped is behind a firewall, NAT, or >ICS, Remote Assistance will still function as long as the person being >helped initiates the session via Windows Messenger. However, as stated >above, Remote Assistance will not work in cases when the outbound >traffic from port 3389 is blocked. > > > Administering Remote Assistance in Corporate Environments > >There are several issues to consider when managing and administering >Remote Assistance in the corporate environment or large organization. >You can specify an open environment where employees can receive Remote >Assistance from outside the corporate firewall. Or you can restrict >Remote Assistance via Group Policy and specify various levels of >permissions such as only allowing Remote Assistance from within the >corporate firewall. > > > Configuring Port 3389 to Enable Remote Assistance > >Remote Assistance runs over the top of Terminal Services technology, >which means it needs to use the same port already used by Terminal >Services: port 3389. For more information about using and configuring >ports, see this Microsoft Knowledge Base article ><http://support.microsoft.com/default.aspx?scid=kb;en-us;150543&sd=tech>. > >*Note*: If the person who is being helped is behind a firewall, NAT, or >ICS, Remote Assistance will still function as long as the person being >helped initiates the session via Windows Messenger. However, as stated >above, Remote Assistance will not work in cases when the outbound >traffic from port 3389 is blocked. > > > Using Remote Assistance in a Home Network > >If you are using Personal Firewall or NAT in a home environment, you can >use Remote Assistance without any special configurations. However, if >you have a corporate-like firewall in a home environment, the same >restrictions apply: you would need to open Port 3389 in order to use >Remote Assistance. >_______________________________________________ >VNC-List mailing list >[email protected] >To remove yourself from the list visit: >http://www.realvnc.com/mailman/listinfo/vnc-list _______________________________________________ VNC-List mailing list [email protected] To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
