Overclock.net › Forums › Software, Programming and Coding › Networking & Security › Trying to Port Forward Behind 2 Routers
New Posts  All Forums:Forum Nav:

Trying to Port Forward Behind 2 Routers - Page 2

post #11 of 14
This was something I had to look into the other day dealing with my home setup (Modem -> Cisco E3000 Wifi -> Sonicwall TZ170 -> My Computer). This was the quick guide from Port Forward that I found that might help explain what needs to happen here for you.

http://portforward.com/help/doublerouterportforwarding.htm

I certainly recommend trying to forward properly, and not just bridging everything together and being lazy. It would be important to me to keep my local network separated from that of my tenants (as you don't know who they'll allow onto it themselves). Your going to need to start with port forwarding from the dsl modem/router to your Linksys router. Then the port forward already setup on your linksys should carry it to your computer.
Edited by W4LNUT5 - 3/22/13 at 3:56pm
    
CPUMotherboardGraphicsRAM
I5-2500k 4.8Ghz @ 1.38v Z68X-UD4-B3 PNY 480 8GB Dominator 1600's 
Hard DriveOptical DriveOSMonitor
Intel 510 + 300GB Velociraptor LG DVD RW Server 2012 HP 25" + HP 20" 
KeyboardPowerCaseMouse
Deck Legend TX850W XClio Coolbox Mamba 
Mouse PadAudio
Dolica HD550's 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
I5-2500k 4.8Ghz @ 1.38v Z68X-UD4-B3 PNY 480 8GB Dominator 1600's 
Hard DriveOptical DriveOSMonitor
Intel 510 + 300GB Velociraptor LG DVD RW Server 2012 HP 25" + HP 20" 
KeyboardPowerCaseMouse
Deck Legend TX850W XClio Coolbox Mamba 
Mouse PadAudio
Dolica HD550's 
  hide details  
Reply
post #12 of 14
Quote:
Originally Posted by felladium View Post

That is true for outbound traffic. Example: You and someone else on your network go to Google:80 and the router keeps track of the translations for those outbound flows.

The current concern is with inbound traffic. There is only one Internet routeable IP of concern in this equation (the WAN IP of the first router). That will be the destination IP used any client wishing to communicate with a device on either the tenant or OP's network. That is the only IP the client will see. When the first router receives the clients traffic, it has to base it's forwarding/discarding decision on defined, explicit policies or internal defaults (like catch-alls). I think the DMZ is like a catch-all for things left undefined and I think configured policies have priority over the DMZ. Therefore, I'm fairly certain that if they both host something that listens on the same port, OP is going to suffer without some additional tweaking somewhere.

Inbound traffic -> (DSL Modem) DMZ -> (OP's Router) Port-Forward should work, shouldn't it? If the issue is the DSL modem and not both, he shouldn't even have to port-forward it, just put his router's IP in the DMZ. I don't think it would matter too much about priority after the fact since if we are dealing with two separate devices. I'm not that great at networking, but I have dealt with a lot of NAT issues, and have some basic knowledge of networking.
post #13 of 14
Quote:
Originally Posted by Madman340 View Post

Inbound traffic -> (DSL Modem) DMZ -> (OP's Router) Port-Forward should work, shouldn't it? If the issue is the DSL modem and not both, he shouldn't even have to port-forward it, just put his router's IP in the DMZ. I don't think it would matter too much about priority after the fact since if we are dealing with two separate devices. I'm not that great at networking, but I have dealt with a lot of NAT issues, and have some basic knowledge of networking.

No one is saying the DMZ solution won't work for OP. I definitely see no reason why it wouldn't. However, I tend to think a little further ahead than "make this work now".

I say try it. It's just a home network and you learn the most when you break stuff anyway.
 
Kids-PC
(12 items)
 
White Heat
(20 items)
 
CPUMotherboardGraphicsRAM
Intel Core i5-2400 - BX80623I52400 ASUS P8P67 GIGABYTE GeForce GTX 550 Ti - GV-N550D5-1GI G.SKILL Ripjaws X + Turbulence II 
Hard DriveHard DriveOptical DriveCooling
80 GB Hitachi SATA II 500 GB Seagate SATA II LITE-ON 24X DVD Writer - iHAS224-06 CORSAIR CAFA50 
OSMonitorPowerCase
Microsoft Windows 7 Ultimate Edition 64-bit Acer G205HVbd Rosewill HIVE Series HIVE-650 NZXT Source 210 S210-001 
CPUMotherboardGraphicsRAM
Intel Core i7-4790K ASUS Maximus VII Impact EVGA GeForce GTX 980 Ti Classified G.SKILL Trident X Series F3-1600C7D-16GTX 
Hard DriveHard DriveCoolingOS
Samsung 840 EVO (OS Drive) Samsung XP941 (Storage Drive) Corsair Hydro Series Extreme Performance H100i Microsoft Windows 10 Professional 
MonitorMonitorKeyboardPower
ASUS ROG Swift PG278Q ASUS PB278Q Corsair Vengeance K70 RGB (non-trampstamp) Corsair AX860 
CaseMouseOtherOther
Corsair Graphite 380T Logitech G400 Corsair - Individually Sleeved AX 860/760 ATX 2... Individually Sleeved AX 860/760 ATX 24pin Cable... 
OtherOtherOtherOther
Xbox 360 Wireless Gaming Receiver BitFenix Spectre Pro 200mm Fan - White LED (BFF... Corsair SP120 PWM High Performance Fans Corsair AF120 Quite Edition Fan 
  hide details  
Reply
 
Kids-PC
(12 items)
 
White Heat
(20 items)
 
CPUMotherboardGraphicsRAM
Intel Core i5-2400 - BX80623I52400 ASUS P8P67 GIGABYTE GeForce GTX 550 Ti - GV-N550D5-1GI G.SKILL Ripjaws X + Turbulence II 
Hard DriveHard DriveOptical DriveCooling
80 GB Hitachi SATA II 500 GB Seagate SATA II LITE-ON 24X DVD Writer - iHAS224-06 CORSAIR CAFA50 
OSMonitorPowerCase
Microsoft Windows 7 Ultimate Edition 64-bit Acer G205HVbd Rosewill HIVE Series HIVE-650 NZXT Source 210 S210-001 
CPUMotherboardGraphicsRAM
Intel Core i7-4790K ASUS Maximus VII Impact EVGA GeForce GTX 980 Ti Classified G.SKILL Trident X Series F3-1600C7D-16GTX 
Hard DriveHard DriveCoolingOS
Samsung 840 EVO (OS Drive) Samsung XP941 (Storage Drive) Corsair Hydro Series Extreme Performance H100i Microsoft Windows 10 Professional 
MonitorMonitorKeyboardPower
ASUS ROG Swift PG278Q ASUS PB278Q Corsair Vengeance K70 RGB (non-trampstamp) Corsair AX860 
CaseMouseOtherOther
Corsair Graphite 380T Logitech G400 Corsair - Individually Sleeved AX 860/760 ATX 2... Individually Sleeved AX 860/760 ATX 24pin Cable... 
OtherOtherOtherOther
Xbox 360 Wireless Gaming Receiver BitFenix Spectre Pro 200mm Fan - White LED (BFF... Corsair SP120 PWM High Performance Fans Corsair AF120 Quite Edition Fan 
  hide details  
Reply
post #14 of 14
Quote:
Originally Posted by felladium View Post

No one is saying the DMZ solution won't work for OP. I definitely see no reason why it wouldn't. However, I tend to think a little further ahead than "make this work now".

I say try it. It's just a home network and you learn the most when you break stuff anyway.

Well hopefully the thread started won't be breaking anything haha.

Regarding the DMZ and PAT overflow, after giving it some thought I think you might be right with the inbound traffic.

However, this solution should work fine for the OP unless the other tenants just happen to run the same P2P game or server, but then again that would be an assumption.

OP -Depending on the circumstances putting your router in a DMZ on the first router would work. Just make sure that if you are running any servers or P2P games that the tenants aren't using the same on their network otherwise the outside world won't be able to find you, only their network. If this is all a bit complicated for you and the tenants aren't tech savy, then its safe to say that you can just slap the IP address of your router into the DMZ settings on theirs. Your game should then work fine.
Skynet HQ
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Athlon X2 Dual Core 2.70GHz Asus M3N-78 PRO ATI XFX 5770 5GB Corsair DDR2 
OSMonitorKeyboardPower
Windows 7 Ultimate 2x 23" LG Flatrons Logitech MX3100 850w PSU 
CaseMouse
X-Blade Gaming Case Logitech MX1100 
  hide details  
Reply
Skynet HQ
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD Athlon X2 Dual Core 2.70GHz Asus M3N-78 PRO ATI XFX 5770 5GB Corsair DDR2 
OSMonitorKeyboardPower
Windows 7 Ultimate 2x 23" LG Flatrons Logitech MX3100 850w PSU 
CaseMouse
X-Blade Gaming Case Logitech MX1100 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Networking & Security
Overclock.net › Forums › Software, Programming and Coding › Networking & Security › Trying to Port Forward Behind 2 Routers