Does Linksys e6500 use a static IP

[Snapy1]

I was wondering if Linksys e6500 used a static IP, if not that's a good thing, I run servers so I cannot have static IP.

[Maskot]

I was wondering if Linksys e6500 used a static IP, if not that's a good thing, I run servers so I cannot have static IP.

If you run servers, build your own router? 

 

http://www.youtube.com/watch?v=I1GDxvQAl_c

[dalekphalm]

I was wondering if Linksys e6500 used a static IP, if not that's a good thing, I run servers so I cannot have static IP.

Uhm... what?

 

Can you please clarify your question, and what you mean by "I cannot have static IP"? Are you asking about the IP addresses for your local network, or the outgoing IP from your ISP?

 

1. The Linksys E6500, along with pretty much every other router, can assign IP addresses to your local devices via DHCP (Dynamic Host Configuration Protocol). You can also use static IP addresses with it, or even a combination of both (Say, set your DHCP to start at .100, so you have .1 to .99 for static addresses).

2. Most servers WANT to be ran via static IP addresses.

3. Your outgoing IP address (That the Internet sees) depends on your ISP, and whether you're using a dynamic IP service. Most residential internet uses Dynamic IP's, though you can often pay a monthly surcharge to get a static IP.

[Maskot]

Uhm... what?

 

Can you please clarify your question, and what you mean by "I cannot have static IP"? Are you asking about the IP addresses for your local network, or the outgoing IP from your ISP?

 

1. The Linksys E6500, along with pretty much every other router, can assign IP addresses to your local devices via DHCP (Dynamic Host Configuration Protocol). You can also use static IP addresses with it, or even a combination of both (Say, set your DHCP to start at .100, so you have .1 to .99 for static addresses).

2. Most servers WANT to be ran via static IP addresses.

3. Your outgoing IP address (That the Internet sees) depends on your ISP, and whether you're using a dynamic IP service. Most residential internet uses Dynamic IP's, though you can often pay a monthly surcharge to get a static IP.

Your Modem has a supplied static IP from your ISP, when you hook a router up to it, people will see your routers IP and not your modems IP, a modem needs to keep its static IP, but a router can have a dynamic IP.

[LAwLz]

Your Modem has a supplied static IP from your ISP, when you hook a router up to it, people will see your routers IP and not your modems IP, a modem needs to keep its static IP, but a router can have a dynamic IP.

No, that's not how it works. A modem doesn't even need an IP (but a lot of them do for management purposes) since all the modem does is separate the POTS signal from the Internet packets.

What @dalekphalm said is 100% correct.

[rufee]

You can set it any way you wish, when you use your modem in bridge mode its transparent to the network (as in it appears that the router is connected not the modem) and you use PPTP on the router not the modem anymore to authenticate and get an IP.

Usually (this is the rest of the world who don't use modems anymore) ISP's assign IP's via DHCP so your router will get its "dynamic" IP from the ISP's DHCP according to the routers MAC address, i say "dynamic" in quotes because it can be static if the ISP sets your MAC address to match your IP so every time you connect your router to the modem or directly to the ISP switch or what have you you get the same IP as last time or you do not if the ISP does not give out static IP's. Only if the ISP gives out static IP's then you can set it in your routers settings so you have the same IP every time you connect. As for what happens behind your router once a device is connected by default the router has its DHCP option enabled and will give out dynamic IP's to the PC's or phones or whatever have you connected to it thats why it might appear that IP's are changing to counter that there is an option to reserve IP's in the routers settings.

When it comes to servers NAT is important, when you set up your router it takes up your public IP address so when for example i connect to your IP i actually connect to your router and not the server that is behind it, every router lets you "port forward" that is to assign a specific port on the router to be a sort of a gateway to your server on its local ip (example 192.168.1.5), since outside networks (me) can't see your local IP's you need to forward a port or port ranges for me to communicate to your server behind your router so let say you forward port 9999 to your server, now i can communicate with that server using your public IP (lets say its 10.10.10.10) the router knows that a packet came in through port 9999 and it will forward it to your server thus allowing it and me to talk to it.

[dalekphalm]

Your Modem has a supplied static IP from your ISP, when you hook a router up to it, people will see your routers IP and not your modems IP, a modem needs to keep its static IP, but a router can have a dynamic IP.

 

 

No, that's not how it works. A modem doesn't even need an IP (but a lot of them do for management purposes) since all the modem does is separate the POTS signal from the Internet packets.

What @dalekphalm said is 100% correct.

As @LAwLz has said, @Maskot is wrong. I am 100% right in my explanation (Which, obviously, is simplified). The IP Address assigned by the ISP is, in a majority of residential cases, Dynamic. You can often ACQUIRE a Static IP via a small fee, or even sometimes for free, but very rarely does anyone actually use this feature, if even available. See, for a typical residential user, there is literally no benefit of having a static IP from your ISP over having a dynamically assigned one. It is only useful for those who run servers or specific protocols/applications that might direct connect via an IP address.

 

Having a static IP address for a residential user is VERY uncommon.

 

However, on the flip side, many businesses have static IP addresses from their ISP for use with their servers (web servers especially). It's much more common in the enterprise world then it is in the residential one.

[Maskot]

As @LAwLz has said, @Maskot is wrong. I am 100% right in my explanation (Which, obviously, is simplified). The IP Address assigned by the ISP is, in a majority of residential cases, Dynamic. You can often ACQUIRE a Static IP via a small fee, or even sometimes for free, but very rarely does anyone actually use this feature, if even available. See, for a typical residential user, there is literally no benefit of having a static IP from your ISP over having a dynamically assigned one. It is only useful for those who run servers or specific protocols/applications that might direct connect via an IP address.

 

Having a static IP address for a residential user is VERY uncommon.

 

However, on the flip side, many businesses have static IP addresses from their ISP for use with their servers (web servers especially). It's much more common in the enterprise world then it is in the residential one.

I don't even know why you brought up the modem since no one directly connects a server to it in the first place... I was right in that your routers IP is what is seen by other people and websites.  Mine for example (Don't really care if you have it, it's already been posted elsewhere on the forum and I have been Doxed and Ddosed about a year ago) My modem is a static IP, that's what I know, that's what my ISP tells me.

 

 

[dalekphalm]

I don't even know why you brought up the modem since no one directly connects a server to it in the first place... I was right in that your routers IP is what is seen by other people and websites.  Mine for example (Don't really care if you have it, it's already been posted elsewhere on the forum and I have been Doxed and Ddosed about a year ago) My modem is a static IP, that's what I know, that's what my ISP tells me.

 

 

Okay... that IP address, isn't your "Router's" IP address. It's your modems (Assuming you connect to the Internet via a Modem, and not via a WAN or something). If I went to my Linksys Status Page (I have the E4200v1), it would look pretty much exactly the same as yours.

 

What is basically happening, is that your Router has taken over "dial" control from the modem. In essence, the router is giving directions to the modem on how to connect to the Internet (options being PPPoE, DHCP, etc). If you have cable internet, it's DHCP and basically the modem calls home (their office) without any login info, and they just match the mac address info with their records, and connect and assign you an IP address.

 

With DSL, you dial in with PPPoE, with a username and password. The ISP verifies the info then assigns you an IP address,

 

You may get the SAME IP address for a while. Or it may change every time you reset your modem or have to reconnect. This is entirely up to your ISP.

 

Your Router's actual IP address is something like 192.168.1.1 (You can of course change this to pretty much whatever). The only exception to this would be if you had a COMBO Modem/Router device (Like those Cellpipe modems and crap). A Combo device would then actually have TWO IP addresses. It would have a public outgoing address (Still assigned by your ISP), and an internal IP address (similar to 192.168.1.1).

 

Your Router, being directly connected to your modem, will of course SHOW what that public IP address is. That doesn't mean that it magically becomes the router's IP address (again, unless it's a combo device). All the Router is doing, is retrieving information back from the modem and reporting it on the screen.

 

Also, as for Servers. No, the server is never directly connected to the modem (Unless your a dumbass who is asking to be hacked, ddos'd etc). Usually the Server is on a subnet or DMZ isolated from the rest of your network as well as the internet, behind a firewall. The server, however, whether it's directly connected to the modem or not, will often still receive a PUBLIC static IP address, because many types of servers benefit from having a Static IP address (Web servers for example, with less updating to the DNS server, and therefore less downtime on the actual website).

 

As an example of this: I used to work at a Library for their IT team. We had ONE connection coming in, it was a business grade Rogers Cable Internet connection (Very slow though, like 10 Mbps for the Library and 3 branches). The modem provided by Rogers had a Public IP address assigned to it. In this case it was static, but normally for consumers, it would be dynamic (Can change at any time without notice). So when someone would browse the web, and visit "What's my ip address", that is the number that would return to them.

 

That modem was connected to about a half dozen switches, a firewall, and 6 servers. A couple of those servers had a static public IP address, in addition to the one for the modem. Basically, the modem would broadcast a different IP address, depending on if traffic was coming from the static server, or the rest of the network. I don't pretend to fully understand all of this, as I'm not that high level with network engineering and routing yet.

 

But when you say that the public sees your "Routers" IP address, that's just not true, unless your "router" is ALSO your "modem. Yes, your router can SEE the public IP address you are using, and will display it on the screen, but that doesn't mean what you think it does.

[Maskot]

Okay... that IP address, isn't your "Router's" IP address. It's your modems (Assuming you connect to the Internet via a Modem, and not via a WAN or something). If I went to my Linksys Status Page (I have the E4200v1), it would look pretty much exactly the same as yours.

 

What is basically happening, is that your Router has taken over "dial" control from the modem. In essence, the router is giving directions to the modem on how to connect to the Internet (options being PPPoE, DHCP, etc). If you have cable internet, it's DHCP and basically the modem calls home (their office) without any login info, and they just match the mac address info with their records, and connect and assign you an IP address.

 

With DSL, you dial in with PPPoE, with a username and password. The ISP verifies the info then assigns you an IP address,

 

You may get the SAME IP address for a while. Or it may change every time you reset your modem or have to reconnect. This is entirely up to your ISP.

 

Your Router's actual IP address is something like 192.168.1.1 (You can of course change this to pretty much whatever). The only exception to this would be if you had a COMBO Modem/Router device (Like those Cellpipe modems and crap). A Combo device would then actually have TWO IP addresses. It would have a public outgoing address (Still assigned by your ISP), and an internal IP address (similar to 192.168.1.1).

 

Your Router, being directly connected to your modem, will of course SHOW what that public IP address is. That doesn't mean that it magically becomes the router's IP address (again, unless it's a combo device). All the Router is doing, is retrieving information back from the modem and reporting it on the screen.

 

Also, as for Servers. No, the server is never directly connected to the modem (Unless your a dumbass who is asking to be hacked, ddos'd etc). Usually the Server is on a subnet or DMZ isolated from the rest of your network as well as the internet, behind a firewall. The server, however, whether it's directly connected to the modem or not, will often still receive a PUBLIC static IP address, because many types of servers benefit from having a Static IP address (Web servers for example, with less updating to the DNS server, and therefore less downtime on the actual website).

 

As an example of this: I used to work at a Library for their IT team. We had ONE connection coming in, it was a business grade Rogers Cable Internet connection (Very slow though, like 10 Mbps for the Library and 3 branches). The modem provided by Rogers had a Public IP address assigned to it. In this case it was static, but normally for consumers, it would be dynamic (Can change at any time without notice). So when someone would browse the web, and visit "What's my ip address", that is the number that would return to them.

 

That modem was connected to about a half dozen switches, a firewall, and 6 servers. A couple of those servers had a static public IP address, in addition to the one for the modem. Basically, the modem would broadcast a different IP address, depending on if traffic was coming from the static server, or the rest of the network. I don't pretend to fully understand all of this, as I'm not that high level with network engineering and routing yet.

 

But when you say that the public sees your "Routers" IP address, that's just not true, unless your "router" is ALSO your "modem. Yes, your router can SEE the public IP address you are using, and will display it on the screen, but that doesn't mean what you think it does.

Why is it that when I directly connect to my modem, it's a different IP? But when I connect to my router, it's that IP every time?

[dalekphalm]

Why is it that when I directly connect to my modem, it's a different IP? But when I connect to my router, it's that IP every time?

That's a good question. It shouldn't be different.

 

Or, they should both be different each time you connect. It might have something to do with which Mac Address is being broadcast when you authenticate. I'd have to have a network expert give you a real explanation.

 

If any is reading this, maybe they can offer an explanation as to how that would work please?

[LAwLz]

Why is it that when I directly connect to my modem, it's a different IP? But when I connect to my router, it's that IP every time?

If you explain your setup (I stopped following this thread when it derailed) and give me the first 3 octets of your IP then I might be able to explain what's going on.

 

Without knowing how your setup is configured, my guess is that when you connect to your modem directly, you don't have DHCP on so you get a random public IP from your ISP. When you connect to your router, you have DHCP and it just happens to be that you have gotten the same private IP a few times in a row.

[Blade of Grass]

Why is it that when I directly connect to my modem, it's a different IP? But when I connect to my router, it's that IP every time?

When you connect directly to your modem it's a different ip address every time.

Are you using a private ip address (anything in the 10.xxx.xxx.xxx, 172.16.xxx.xxx or 192.168.1xxx range).

Your router would have a static IP that it has assigned its self on your private network, you use that IP to login.

You connect to your modem using a public IP, and you just proved that you have a dynamic public IP.

[neon]

Why is it that when I directly connect to my modem, it's a different IP? But when I connect to my router, it's that IP every time?

 

It's probably because your ISP will change your 'house' IP address (the one visable to the outside world) when a different MAC address connects to your modem, your router has a MAC and gets given an IP, when you directly connect to the modem with an Ethernet on your computer it gives you a new different IP because your computer has a different MAC, your ISP probably has some 'residual memory' so when you reconnect the router you get the same IP again, if you left it disconnected for a few days/a week, chances are you would get a new (3rd) different IP.