internal ip changes
in [Network and Web]
|
Prev: Wireless in a hotel room XP - Internet Explorer asks for user name
Next: Local Area Connection Network Cable Unplugged
From: Linea Recta on 5 Jan 2010 16:00 Few days ago I have been portforwarding ports 20-21 in my router for using my FTP server. Thought I had done the job for once and for all and everything worked fine. Today people again couldn't get into my server. After looking in the router setup again, it seemed that all by itself the inernal ip of the PC had changed, so I had to portforward to another ip again! Is this normal? How can I prevent this from happening? Of course I don't want to mess around with the router setup every single day! -- regards, |\ /| | \/ |@rk \../ \/os
From: David B. on 5 Jan 2010 16:37 Set an IP reservation for the FTP server in the router setup or manually set the servers IP using an address outside of the routers DHCP scope. -- -- "Linea Recta" <mccm.vos(a)abc.invalid> wrote in message news:uBQrbokjKHA.5568(a)TK2MSFTNGP02.phx.gbl... > Few days ago I have been portforwarding ports 20-21 in my router for using > my FTP server. > Thought I had done the job for once and for all and everything worked > fine. > Today people again couldn't get into my server. > After looking in the router setup again, it seemed that all by itself the > inernal ip of the PC had changed, so I had to portforward to another ip > again! > > Is this normal? How can I prevent this from happening? > Of course I don't want to mess around with the router setup every single > day! > > > > -- > regards, > > |\ /| > | \/ |@rk > \../ > \/os > > >
From: Jack [MVP-Networking] on 5 Jan 2010 17:52 Hi Some Routers have IP Reservation (aka Static DHCP). If your Router has it, set the IP of the computer that runs the ftp to a reserved IP status. Otherwise, assign to the computer's TCP/IP an static IP that is out of the DHCP Range. Jack (MS, MVP-Networking). "Linea Recta" <mccm.vos(a)abc.invalid> wrote in message news:uBQrbokjKHA.5568(a)TK2MSFTNGP02.phx.gbl... > Few days ago I have been portforwarding ports 20-21 in my router for using > my FTP server. > Thought I had done the job for once and for all and everything worked > fine. > Today people again couldn't get into my server. > After looking in the router setup again, it seemed that all by itself the > inernal ip of the PC had changed, so I had to portforward to another ip > again! > > Is this normal? How can I prevent this from happening? > Of course I don't want to mess around with the router setup every single > day! > > > > -- > regards, > > |\ /| > | \/ |@rk > \../ > \/os > > >
From: Linea Recta on 6 Jan 2010 15:08 "Jack [MVP-Networking]" <jack(a)discussiongroup.com> schreef in bericht news:OMS0xmljKHA.1540(a)TK2MSFTNGP06.phx.gbl... > Hi > Some Routers have IP Reservation (aka Static DHCP). If your Router has it, > set the IP of the computer that runs the ftp to a reserved IP status. > Otherwise, assign to the computer's TCP/IP an static IP that is out of the > DHCP Range. > Jack (MS, MVP-Networking). > Afraid this is very confusing stuff. :-( Using a Sitecom WL-174, have a "manual" but it seems to be for experts... I found DMZ... do I use that?? http://www.sitecom.com/support-product/productid/538#manuals Also, in Windows XP I have been following this http://www.portforward.com/networking/static-xp.htm but it disabled my connection altogether. So I undid the changes. -- regards, |\ /| | \/ |@rk \../ \/os
From: Lem on 6 Jan 2010 17:55
Linea Recta wrote: > "Jack [MVP-Networking]" <jack(a)discussiongroup.com> schreef in bericht > news:OMS0xmljKHA.1540(a)TK2MSFTNGP06.phx.gbl... >> Hi >> Some Routers have IP Reservation (aka Static DHCP). If your Router has it, >> set the IP of the computer that runs the ftp to a reserved IP status. >> Otherwise, assign to the computer's TCP/IP an static IP that is out of the >> DHCP Range. >> Jack (MS, MVP-Networking). >> > > > Afraid this is very confusing stuff. :-( > Using a Sitecom WL-174, have a "manual" but it seems to be for experts... > I found DMZ... do I use that?? > http://www.sitecom.com/support-product/productid/538#manuals > > Also, in Windows XP I have been following this > http://www.portforward.com/networking/static-xp.htm but it disabled my > connection altogether. So I undid the changes. > > > Let me try. You want the computer that runs your FTP server to keep its local (LAN) IP address. There are two ways you can do this: 1. You can configure the router's DHCP server to always assign the same IP address to that computer -- but not all routers can be so configured. 2. You can configure the computer with a static IP address (which has the effect of ignoring the router's DHCP server). If you pick option 2, you have to ensure that the IP address that you choose will not conflict with an IP address that might be assigned by the router's DHCP server to some other device on the LAN. With only a very quick glance at your manual, it does not appear that your router has the capability for option 1. Look at section 4.2.2 of the manual. In the example shown, the router's DHCP server is enabled (good) and configured to assign IP addresses in the range 192.168.0.100 through 192.168.0.201 (that is, it starts with 192.168.0.100 and will assign up to 101 addresses). Thus, configure the the computer on which your FTP server is hosted to have a static IP address between 192.168.0.2 and 192.168.0.99. Remember that when you configure a static IP address, you also must supply the subnet mask (in this case, 255.255.255.0) and the Default Gateway address (the *router's* local IP address; in the manual's example, that would be 192.168.0.1). Enter "configure TCP/IP for static addressing" in Help and Support for directions on setting a static IP address. You do not want "DMZ." -- Lem Apollo 11 - 40 years ago: http://www.nasa.gov/mission_pages/apollo/40th/index.html |