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3 votes
1 answer
2k views

My CenturyLink fiber modem is bridged - can I just get rid of it and use my Cisco ASA 5505?

I was about to go on Amazon to buy my own CenturyLink branded fiber modem (Arris C2100T) to replace the one I am renting from the ISP (Arris C3000T), but then I read here on SuperUser that I might not ...
1 vote
1 answer
344 views

How does a xDSL modem connect to an ISP? [closed]

When configuring a modem, configuration such as VCI, VPI and modulation are required. Equally, a VLAN tag e.g. 10 has to be specified. Additionally, a PPPoE client has to be configured to ...
0 votes
1 answer
743 views

Why my ppp modem interface doesn't show me a public IP address

I have a cellular modem from Zoomtel. I connected my BeagleBone embedded computer running Debian to it via pppd. When I run ifconfig , I see the interface ppp0. However this gets a local IP address ...
0 votes
0 answers
114 views

What is my internet speed?

First three days The speed in the Router "192.168.1.1" is 5 mbit all the time, and in speedtest.net is 5 mbit. After 3 days The speed in speedtest.net dropped to 4 mbit, but still 5 mbit in ...
7 votes
5 answers
10k views

Does an ISP have admin access to your modem/router?

I use a Zyxel P-660HN-T1A modem/residential gateway to connect to my home ADSL subscription. I called my ISP today to inquire about upgrading to a faster broadband package. For some reason, my call ...
1 vote
0 answers
400 views

How can ISP be prevented from remotely accessing modem?

How can I prevent At&t from messing with the modem? Backstory: At&t seems to have updated the firmware on the Arris NVG599 modem and all the settings were lost. After updating the static IP'...
0 votes
2 answers
548 views

Does my external IP belong to my cable modem or router?

Sorry if others have touched upon this before. I'm simply asking whether the external IP 'belongs' to the cable modem or my home router. If someone is pinging or attacking my external IP is it ...
0 votes
3 answers
2k views

When under VPN. Can the modem detect and ISP if I’m downloading torrent?

As the title says, I was wondering that when I’m using VPN could the modem or my ISP detect if I’m downloading torrent?
-1 votes
3 answers
1k views

How can I setup isp backup to my wifi router

I am running my application through internet, It's very important to use an uninterrupted internet connection. So how can I set the Backup ISP to my router(Dual WAN or 3G/4G modem) to connect ...
0 votes
0 answers
260 views

How does Private VPN (like IPVanish) prevent ISPs from monitoring my internet traffic?

I've recently purchased IPVanish subscription due to the concern of NSA snooping. My home network is set up like following Computers => Router => ISP Modem (Spectrum) Now I am worried that ISP ...
1 vote
0 answers
38 views

Can cable signal strength cause failures in particular layer 3 protocols?

In the past, I've lost 98%ish IPv4 connectivity on my Comcast connection, but I had IPv6 connectivity fully. (IPv4 SYNs, or the corresponding SYN-ACKs (it's hard to tell) were getting dropped most of ...
0 votes
0 answers
133 views

What causes my ISP to stop giving IP Address randomly?

I run a pfSense firewall. Out of the blue one night I lost my IP lease and I didn't get a new one. I even tried using a backup router to get the IP and I didn't get anything among many other ...
1 vote
1 answer
1k views

Why does traceroute only sometimes fail to ping my ISP?

I've read that it's fairly common for the first hop or two of a traceroute to only return timed out, as the ISP servers refuse all pings; what does it mean if only some of those pings are dropped/...
0 votes
1 answer
425 views

Using a different modem than the one provided by the ISP

I recently came into possession of two Frontier modems (modem/router). My dad likes the idea of using one of them because they can be switched off and on. However, our ISP is not Frontier; can we ...
4 votes
2 answers
1k views

How does a DSL modem know which ISP to connect to?

I am terminating my contract with my old ISP, however, because I've already paid my account till the end of the month, this connection is still active. I have also signed up with a new ISP who mailed ...

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