Cisco VPN :: 1841 VPN Works With Embarq But Not With Comcast
Jul 13, 2011
I have 3 ASA's, all with the same config attaching to an 1841. One is hosted with Embarq and works fine, one with Comcast is not, the 2nd with a local cable provider is also fussy. Whats up based on the debug from the 1841? I'm getting little debug off the peer ASA from ISAKMP or IPSEC. You can carry the ASA's from one site to the next and the problem does not follow the boxes. This was working fine for several months, but now its not, and no.. the config did not change.
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Oct 21, 2011
I am fairly new to Cisco IOS, yet I've managed to get it up and running on a Cisco 1841 to act as a router and firewall between WAN and LAN. Everything works *except* I am unable to ping or make any other connection from the router itself to the WAN. It will ping or telnet to the LAN, all LAN to WAN traffic is functioning properly, NAT is setup and functioning, WAN to LAN and inbound firewall is working, yet I still cannot ping or telnet from the IOS interface to anything on the WAN side (I've tried using different source addresses)
I am hoping there is something obvious that I overlooked, perhaps IPS is blocking the traffic? Do I need a specific route entry for the local device? I can post entire config if necessary, but would rather not if there is an obvious solution.
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Oct 16, 2012
I have a Embarq 660 Series modem, but i wanted wifi. so i bought a belkin N300 wireless router this morning. And it won't connect to internet. I'm sure i've plug the cable in the right spot. And the EQ 660R ADSL router/modem is working. The belkin package came with a CD, and it's the setup program for the wireless router. but as it tried to form a connection, it said failed to connect to the modem. so does this means embarq 660 series isn't compatible with Belkin N300?
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May 30, 2011
where do I find my wpa or wep number?
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Apr 6, 2011
this computer was working on this router no problem. computer crashed and noiw computer is fine i connected it to my cable from ny desk top comutyer and works fine. It just cannot hook up to the wireless connection?
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Apr 25, 2012
For those of you who are trying to connect your router to a Comcast modem, be sure to actually RESET the modem instead of just depowering it like it instructs you in the setup process. This should save a lot of trial and error. Also unmark the MAC address cloning like the Cisco connect software does, then just renew IP and it should connect just fine.
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Apr 30, 2013
I just purchased Comcast Fiber EDI service. Comcast delivers this service on a /30 network and a /27 network. The customer (me) has to route the /27 network through the /30 network .
Here’s an example of the IP’s they gave me:
10.202.187.128/30 Sub net Mask: 255.255.255.252 Gateway: (.129) Customer Layer 3 (.130 10.202.187.160/27 255.255.255.224
I have a Cisco 1921 router with 2 on board Gigabit Ethernet interfaces. Would I be correct if I put 10.202.187.130 on GigabitEthernet0/1 and 10.202.187.161 on GigabitEthernet0/0 and then do a static route 0.0.0.0 0.0.0.0 10.202.187.130 ?
Obviously I have very little Cisco router knowledge and I’m doing this with the Cisco Configuration Professional software.
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Jul 13, 2011
I just got Comcast at my house and I'm having major problems with my wireless speeds. I was on Frontier until today and both the wired computer and the wireless would download at the same speed and have the same ping. Today, after comcast, the wired computer is downloading at about 70 megs a second, and the wireless is at about .3 megs a second. I turned off the security (I'm in the country, no security needed) and changed the channel. I went to ASUS to get the newest wireless driver...
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Sep 11, 2012
I have had comcast for 4 years and for the last two years my comcast connection had been dropping. At the time I didn;t take it as a big deal because I have bad connection but not it's way too frequent to ignore. I have gotten a new router and exchanged a modem from comcast. Basically at a random time of the day internet just goes off. To fix it, I have to go up to the router and disconnect and reconnect the router. Even sometimes it doesn't fix the connection so now to fix the dropped internet everytime I do the following procedure: Unplug ethernet cable from modem --> Unplug the modem --> unplug the cable that connects the modem and a Y-extension for TV and internet
Motorola modem: (new one)
Software Version: SB5120-2.19.0.16-SCM00-NOSH
Hardware Version: 1
MIB Version: II
GUI Version: 1.0
VxWorks Version: 5.4
Cisco E-1200 v1 router (new one)
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Dec 15, 2012
We can not get our PS3 to stay connected to the internet. We have Comcast and a Belkin router. We were told to clone Comcast's Mac Address to our router.
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Oct 17, 2012
I'm looking to upgrade my SB-5100 Motorola Cable modem that I now rent from Comcast. My main objective is to increase my internet performance.
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May 17, 2013
Well its in this line but do i have to type in a ip even if comcast is giving me a dhcp address?
route outside 0.0.0.0 0.0.0.0 any 1
=============================
hostname asa1
domain-name mydomain.com
enable password rwt5UQJihEq2/Qae encrypted
names
!
interface Vlan1
[code].....
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Apr 11, 2012
We have 50 Mb Comcast cable conencted to 2951. There is another conenction to AT&T 20 Mb circuit which goes thru' an ASA 5510. Path to Internet is as below. [code]
As long as Comcast is up, 2951 sends Internet traffic out to Comcast and uses AT&T via ASA for backup.When traffic goes over Comcast, users complain about slow speed out to Internet. If we force traffic to AT&T via ASA, speed issue goes away.
We don't see any issue on 2951 router in terms of CPU or memory util.WHat can cause slow speed despite the fact that router resources are not maxed out and Comcast circuit has 150% more capacity than AT&T?
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Sep 28, 2012
I am trying to configure a 891 W to basically provide DNS from my ISP to my internal clients on the 891 W. Currently when I am on a PC I can see that I receive my IP information along with the correct ISP DNS IPs. However when I try to connect or resolve a URL it fails. Nor can I perform an ns lookup from the cli of the 891 W. I seem to be having a translation issue with DNS.
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Jul 31, 2012
I have a 'Comcast Business Gateway' a friend gave me and I would like to use it instead of the regular gateway. The business gateway has extra Ethernet ports on the back where as the regular gateway just has one for your router. I plugged in the business gateway and I couldn't access the network. I used 10.1.10.1 which I thought was comcast's default but to no avail. I am not a tech so I am now stuck.The whole reason I am trying to do this is because the wireless routor is in the house, with a ethernet wire running to the shop. This distance is about 60 feet. I have the computer pluged into the wire but I can't get the printer or the other computer to connect to the wireless. I would like to connect the Business Gateway to the house wireless and then run the hard wire to the shop and connect another wireless router to the wire and run the shop on its own wireless. I tried one of the wireless extenders and it does not have enough juice.
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Oct 13, 2012
My mom just got comcast internet for the restaurant but I can't log in to it with my laptop because i dont know the network security key i looked under the smcd3g-ccr router but no network key only find theses labels, Model Name, Smc P/N, P/N, S/W Rev, H/W Rev, R/F Mac, Wan Mac, S/N, and Iden:1033, But no network key or wep label. I tried logging in the router with default gateway 10.1.10.1 and entered cusadmin for login and highspeed for pass and in the router there is no wireless tab, NONE, so I can't find the ssid or wep key ill show you a picture for the homepage [url]...
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Jun 14, 2011
I have had a wireless LAN in my home for a couple of years now and it's always worked great. I could download a 10MB file in less than a minute. Then I moved one of my computers & Wii to the other side of the house & now I can hardly get Google to load. My wireless adapter utility says I have only one "bar", and the signal strength is about 20%. Often it drops the connection altogether. I've tried the Wii, and another computer in the same location and they have a very poor connection as well. To make things even more confusing I can get a sporadic burst of speed that will sometimes last a minute, sometimes an hour. I have a Linksys WRT300N router with Comcast cable service. Is there any way I can boost my signal strength? Is there even such a device?
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Jul 12, 2011
tried 2 routers, one brand new , both DIR655 from Dlink - an older router. Just got a Comcast internet connection. The internet is fine when connected to the laptop directly. The router can talk to the computer. but plugging the internet cable into the router, the router never quite finds it, ie the blue indicator light never indicates access from modem to the router. So cant get that extra protection from the router, or the convenience of it.
By the way I am doing all of this hardwired even though the router is wireless capable. I did a hard reset which I could log on and see worked of the router. This happens when it is not hooked to the computer. I did the thing of powercycling modem and router, no change. Do I need a newer router? Is there something weird about Comcast, these were fine w Cablevision. Comcast tech support was useless.
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Dec 9, 2012
I bought comcast xfinity internet about a month ago, and I cannot get any upload speed. It's jammed up at about .40, and I'm paying for 3-4 mbs. My plan is 15/3, but the download speed is always over 20 mbs, while the upload is .40.
Comcast has been here twice with two new modems, and ran brand new cable under the house, because they said the signal was weak. Now it's strong, the modem is fine, and there is STILL no upload. I can barely upload pics to photobucket. Comcast basically told me there is nothing wrong on their end, and there is nothing they can do. The signal is strong, the modem is fine, the cabling is fine, and they are providing their service on their end.
[code]...
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Feb 26, 2011
I had recently switched to Comcast Xfinity Blast internet. I ordered the service with 22 mbps. Now when I download something, it becomes a challenge for the download to get faster than 500kbps. I don't understand, It should be a lot more. If it stays at this rate, than there would be no difference between my current and previous service.
[code]....
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Feb 5, 2012
I just moved into a new apartment. It has Comcast performance internet (16mbps). However im not getting anywhere near that. I have it connected via ethernet.
I tried speedtest.net and my result was 1mbps download. ping of 225. Web windows take forever to open
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May 7, 2012
I'm currently using my Acer Aspire x1700 desktop computer running Windows 8. It's connected to my router via Ethernet and gets about 25mb/sec. The problem is, my router can only broadcast the signal to my two front rooms and all of the rooms of the level it's on (Living Room, Sun Room, & Kitchen). All of my devices get full signal in these rooms. The holidays are coming up, so people are going to start bringing cellphones, tablets, gaming devices, etc into my house. My room is about 24 ft away from it (My 2nd floor is 8.5 ft above the 1st). In my room, my laptop, a Dell Inspriron running Windows 7, got about 13mb/sec. But as soon as I walk into the next room, which is about 8 ft away, the signal becomes very spotty on my iPod touch/iPad. My laptop can pick up about 2 bars, and so can my Grandma's HP. If I move another 2 feet into my mom's room my iPod Touch/iPad gets one bar, my laptop still gets two, but it's very slow and spotty. My iPod touch/iPad gets a kind of weak signal in my room.
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Jun 16, 2012
I have been using my Sony Locationfree tv with Direct TV and now have Comcast and it doesn't work. The installer said i have to change the tv setting to channel 3, but i haven't been able to program the remote he gave me. I thought the device was just a wireless monitor, so i don't see how it has a channel to change
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Feb 5, 2013
New to Cisco but learning some. Needing to know what I should code into CLI on my ASA5505 to make it work with comcast modem which uses DHCP for it's addressing from Comcast proper.
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Feb 23, 2011
Can An ISP Filter Traffic within the VPN Tunnel? Sounds weird but..We have a Avaya IP Office 500 Head end Phone Server. Several 5610 IP Phones.I've setup a PIX 501 to Connect to our ASA 5510. In the Office, going from one Public IP Subnet to the Public IP on the ASA 5510 I'm able to connect up the 5610 IP Phone through the PIX 501 through the ASA 5510 to the IPOffice 500 Server and place calls.I take the same setup home and connect it to my Comcast Internet connection anf it does not work. I can connect a Laptop behind the PIX501 and Connect to the HQ network just fine. I can see the Phone do a TFTP Transfer to the VM Server, though it stops short can cannot connec to the Call Server.
I then gave the unit to 4 other Comcast Users, all of them do not work.I then gave it to a AT&T DSL user, works Great! then another local DSL ISP (Sonic.Net) and it works great.Same hardware, same VPN, Same everything except ISP.Both With Comcast we tried directly to the Cable Modem, or behind a edge router. PCs connect, Phone does not.The thing I do not understand is If Comcast is filtering something, how can they filter something that is in my VPN Tunnel?
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Jun 25, 2012
I spoke with the Comcast gateway support team and they changed my SMC router to the straight gateway/bridge option. If I plug directly from my laptop to the SMC, I have internet connectivity. So I know that aspect is working. I have a Cisco RV220W router that I want to be between the internet/SMC gateway and my network. For the life of me, I cannot get the internet connectivity to pass through to the router. I've done the proper power on order numerous times. Tried variations just for the heck of it. And nothing. Am I missing a step? If I do the "wizard" on the router, it basically tells me it sees no gateway even available even though it is clearly there and plugged into the WAN port. I don't see any option in the router settings for me to specify like the DHCP server I should be reaching out (if there even is one). My understanding is I shouldn't need to as the router should just recognize it. Should I be using a static IP instead?
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Dec 5, 2011
I sometimes am forced to use my computer at work to set-up wireless networks for employees who move into temporary apartments. Now every time I am at my home, my computer, ipad, and iphone keep redirecting to comcast home activation page. The problem is the home activation page that comes up is for one of the apartments I set-up for my employer. It seems to be stuck on the final steps of this other persons comcast set-up and I cant get it to go away. I have a Linksys router with a secure network. It shows I am connected to my network, but when I try to get on-line it send me right back to Comcast activation page for someone elses account. Countless calls to Comcast have gotten me know where. Since the final steps of the comcast activation involve downloading desk top software, and the ipad will not let you download desktop software even into dropbox. It has made my ipad useless when I'm at home.
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Apr 8, 2012
I've switched internet provider from Verizon DSL to Comcast cable just a month ago. Since that time my wife can no longer connect to her work email? I've call comcast many times since the only thing that changed was provider? This is the error I get now
If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.
I've tried explorer and taken down the firewalls, I had her school IT person remote access to my computer to see if it is on their end...still she can't connect. We can access from other computers (my work) but still not on my home computer (windows vista) Comcast now tells me not there problem since I can connect to internet? I've also changed my norton protect to AVG to see if that was an issue..
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Feb 7, 2013
I work in small office with four users and we use Comcast as our ISP. A separate room from the office has our cable modem. The cable modem has a Ethernet cable going to a WRT54G WAN Port. The WRT54G is not being used as a wireless router.Coming from the LAN ports is a Ethernet cable going to a Netgear switch.The office has Ethernet ports and one of them is hooked up to a Netgear WDNR3700 wireless router. All users are utilize the wireless network to get online. There IP Address is 10.0.x.x. When I use a Ethernet cable to a computer my IP Address is 192.168.x.x.
What needs to be done so the IP Addresses of the wireless network and wired network use the same IP Address range?
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May 2, 2012
I have a Comcast Router pushing out IP's in the 10.1.10.X range. I want to hookup a Linksys E1000 Router so I can use its wireless & Guest access features. The Linksys is using the 192.168.1.x range. I have a cable from the comcast router running into the Internet port of the Linksys. I have tried changing the Linksys router IP to 10.1.10.x and turning off DHCP. It will not allow me to the internet nor allow the PC connected to it to connect to the PC that is attached to the Comcast Router. I cannot replace the Comcast as it is a combi router/modem.
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May 25, 2011
I cannot get my computer to recognize my Netgear WNR1000. I have called Netgear to explain the issue and was on the phone with them for 45 minutes.They did get the laptop to work but my desktop still does not. They told me it was a browser error. If I disconnect the ethernet cable from the router to my computer everything works perfect.I tried to reinstall the CD that came with the router and as I try to get through step 2 it says no router detected.I think this is my hold up but I have no way to know how to fix this. I tried to go on the Netgear website and they tell me that I have to be able to connect to the internet to download through the router. Well I can't do that because obviously that is the hangup. If I click on my Network Connections. It shows my computer connected to a Network with limited capability and then a big red X going to the internet.
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Jan 17, 2012
Just got home from the Comcast store with a $7 rented modem just to last me until I do research and purchase one. I realize that this modem has only one Ethernet port with no WiFi support so I have another PC and a laptop sitting idle because there's no internet access. Did a quick search using Comcast's authorized modem's list and all of them only have a single Ethernet port and no WiFi. Is there a modem with multiple Ethernet ports with built in WiFi? I am getting almost 20mbps with a download speed of 4mb/s which is a HUGE improvement over my ATT DSL service that I've had since forever at 3mbps with a download speed of 300kb/s. I have no idea what technical specifications to look for in a cable modem to get 100% of full potential speed from my service without disconnects or other various problems.
I have a ATT U-Verse router sitting here right now, I am wondering if I can somehow connect it to my Comcast modem. I tried to connect the ATT router into Comcast modem via Ethernet cable, but I couldn't get past the "Your DSL service is unavailable" in the browser, but in my desktop system tray, it shows I am connected to the internet. If I could use this router, I would rather spend money on a modem instead of getting a combo.
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Jan 24, 2013
I have Comcast 20Mbps internet. When I'm on the Mac partition of my computer, I get 15Mbps download and a ping of less than 10 on speedtest.net. When I'm on my Windows partition, I get a ping of around 250 with a download speed of 1.5Mbps. I read posts where people said disabling their firewall worked, so I disabled mine and it made no difference.
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