You might have a modern environment with all sorts of high-tech equipment, but what makes it worthwhile is how you seamlessly bring together the presentation with audio, video and lighting. The ATEN Control System provides integrated control and system automation.
Solved
SMC Comcast Business Router Configuration
Posted on 2009-06-29
There are a number of other posts with similar questions, but none that I found were able to help me.
When you get a business line from Comcast they give you an SMC router/firewall/modem. Before switching to Comcast business, we had a SonicWall firewall configured and working perfectly for our previous ISP. It allowed inbound terminal services to our terminal services server and OWA (http/https) connections to our exchange server.
Now that I have to place this SMC router in front of the firewall, I'm in a situation where getting the double NAT'ed firewalls working is not as simple as I had hoped.
I know the setup below is wrong because although I have internet access from behind the SonicWall, I can't get in from the outside using services that previously worked (OWA and terminal services).
Comcast wrote down two IPs on the work order:
IP#1: 173.xxx.xxx.205/24
IP#2: 173.xxx.xxx.206/30
Gateway: 10.1.10.1
So this is my setup on the SonicWall:
WAN: NAT-Enabled Static IP: 173.xxx.xxx.205/24
Gateway: 10.1.10.1
SMC:
LAN IP: 10.1.10.1/24
WAN IP: 173.xxx.xxx.206
Static IP Block 173.xxx.xxx.206/30
"Firewall for True Static IP Subnet Only" disabled
"Gateway Smart Packet Detection" disabled
"Static Routing" disabled
"Port Forwarding" disabled
"1 to 1 NAT" disabled
173.xxx.xxx.205 is in the DMZ (I was trying to achieve a "bridge-like" mode even though this device doesn't have a bridge mode)
When I check my public IP from behind the SonicWall, it's currently 173.xxx.xxx.205
What do I need to change for this to work properly?
When you get a business line from Comcast they give you an SMC router/firewall/modem. Before switching to Comcast business, we had a SonicWall firewall configured and working perfectly for our previous ISP. It allowed inbound terminal services to our terminal services server and OWA (http/https) connections to our exchange server.
Now that I have to place this SMC router in front of the firewall, I'm in a situation where getting the double NAT'ed firewalls working is not as simple as I had hoped.
I know the setup below is wrong because although I have internet access from behind the SonicWall, I can't get in from the outside using services that previously worked (OWA and terminal services).
Comcast wrote down two IPs on the work order:
IP#1: 173.xxx.xxx.205/24
IP#2: 173.xxx.xxx.206/30
Gateway: 10.1.10.1
So this is my setup on the SonicWall:
WAN: NAT-Enabled Static IP: 173.xxx.xxx.205/24
Gateway: 10.1.10.1
SMC:
LAN IP: 10.1.10.1/24
WAN IP: 173.xxx.xxx.206
Static IP Block 173.xxx.xxx.206/30
"Firewall for True Static IP Subnet Only" disabled
"Gateway Smart Packet Detection" disabled
"Static Routing" disabled
"Port Forwarding" disabled
"1 to 1 NAT" disabled
173.xxx.xxx.205 is in the DMZ (I was trying to achieve a "bridge-like" mode even though this device doesn't have a bridge mode)
When I check my public IP from behind the SonicWall, it's currently 173.xxx.xxx.205
What do I need to change for this to work properly?
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
-
4
3
2
9 Comments
Active 1 day ago
Did Comcast provide you with any public IPs for usage?
Does the SMC device have any ethernet ports on it? If so, try configuring your sonicwall with one of the public IPs and connect it to the LAN port on the SMC box.
Does the SMC device have any ethernet ports on it? If so, try configuring your sonicwall with one of the public IPs and connect it to the LAN port on the SMC box.
Well the smc gateway has an ip of .206, I;m supposed to be using the .205 address, as we've paid for a static IP.
The SMC does have ethernet ports on it - 4 to be exact. If I configure the SonicWall's WAN IP as the .205 IP, what do I use as the gateway?
The SMC does have ethernet ports on it - 4 to be exact. If I configure the SonicWall's WAN IP as the .205 IP, what do I use as the gateway?
Active 1 day ago
Use the .206 as the gateway. This gateway is not for the SMC device but your ISP's gateway for the internet.
Connect your Sonicwall unit to the etheret port located on the SMC device.
Connect your Sonicwall unit to the etheret port located on the SMC device.
One major Issue:
The part that your sonicWall has a WAN ip of 173.xxx and a Gateway of 10.1.10.1 is wrong. You can never have that. Meaning the Gateway and IP of the device have to be on the same network.
Issue Number 2: you mentioned that:
173.xxx.xxx.205 is in the DMZ (I was trying to achieve a "bridge-like" mode even though this device doesn't have a bridge mode) and 1 to 1 NAT" disabled
So what is your internal IP address of sonic wall? How does it communicate with the gateway you provided? Like I said they have to be on the same network for them to talk to each other. there needs to be some sort of a translation or NATing. (your issue number 2)
I just gave you list of things that are wrong but I have not provided any solution. So answer these questions so I can give you some more help. Which device acts as the DHCP server? Which device does the NATing? May be you can disable the NAT on your SMC device and make it act like a layer 2 bridge (roughly).
Let me know
The part that your sonicWall has a WAN ip of 173.xxx and a Gateway of 10.1.10.1 is wrong. You can never have that. Meaning the Gateway and IP of the device have to be on the same network.
Issue Number 2: you mentioned that:
173.xxx.xxx.205 is in the DMZ (I was trying to achieve a "bridge-like" mode even though this device doesn't have a bridge mode) and 1 to 1 NAT" disabled
So what is your internal IP address of sonic wall? How does it communicate with the gateway you provided? Like I said they have to be on the same network for them to talk to each other. there needs to be some sort of a translation or NATing. (your issue number 2)
I just gave you list of things that are wrong but I have not provided any solution. So answer these questions so I can give you some more help. Which device acts as the DHCP server? Which device does the NATing? May be you can disable the NAT on your SMC device and make it act like a layer 2 bridge (roughly).
Let me know
Setting the WAN IP on the firewall to .205 and using .206 as the gateway (the smc device), I was able to get an internet connection working with .205 as my public IP. My internal addresses behind the firewall are using 192.168.40.x, but that doesn't seem relevant. Everything seems to be working now.
Featured Post
Josh Coen and Jason Langer have prepared the latest edition of VCP study guide. Both authors have been working in the IT field for more than a decade, and both hold VMware certifications. This 163-page guide covers all 10 of the exam blueprint sections.
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
Problem Description:
Couple of months ago we upgraded the ADSL line at our branch office from Home to Business line. The purpose of transforming the service to have static public IP’s.
We were in need for public IP’s to publish our web resour…
Creating an OSPF network that automatically (dynamically) reroutes network traffic over other connections to prevent network downtime.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Suggested Courses
Course of the Month10 days, 2 hours left to enroll
722 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.