Asynchronous Digital Subscriber Line is a layer 1 networking protocol, typically used for last mile Internet access. It utilises standard telephone cabling and coexists with analogue telephones. An ADSL modem at the customer premises communicates with the DSLAM at the local exchange. ATM is usually ...

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16 views

Corrupted files when downloading with HTTP

With my UMTS connection most archives > 50 MB are corrupted when downloading them via HTTP. The problem should not reside in my network, because I have an additional ADSL connection. When I switch to ...
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0answers
56 views

DSL modem in bridge mode but router not accessible from the internet

I have a DLink ADSL modem which I have put into bridge mode and connected to a Fortigate 200A firewall. The Fortigate is able to connect through PPPoE and receives the static public IP. I can browse ...
0
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0answers
39 views

Connecting a switch to a VDSL2 model causes upload speeds to go to 0

My network configuration has my main router connected to a secondary router which is in bridge mode, and I have a computer connected via ethernet to that secondary router. If the connection between ...
1
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1answer
56 views

Juniper SSG20 Additional subnet on adsl interface

I've configured a Juniper SSG20 to have some clients natted to the internet with the main ip address (X.X.27.90/30) of my IPoA ADSL connection but i have also some servers i wish to connect with a ...
1
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3answers
327 views

How can I diagnose and prove network micro-cuts?

I am unable to keep several types of long running connections open from my office LAN (ADSL) and I need to convince the service provider that there is a real problem. Standard pings and traceroutes do ...
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0answers
115 views

Cisco 877 configuration with multiple firewalls behind in parallel using public IP's

I would like to ask how I can configure my cisco 877 adsl router to have multiple firewalls installed in parallel behind the cisco 877 router. I have enclosed a diagram of what I am trying to achieve. ...
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votes
2answers
211 views

How and why is PPPoE possible over a DSL line? [closed]

Typically (at least here in the UK), the authentication method on a DSL line is PPPoA. This makes sense, based on my understanding that DSL usually uses ATM mode, meaning ATM/AAL5 sits immediately ...
0
votes
1answer
444 views

ADSL Router - Access External IP internally

I have a problem when I'm doing an access using my DNS hosted at another server, which performs a redirect to my internal network. example: User attempting access to internal DNS: intranet.site.com: ...
0
votes
0answers
139 views

Linux set routing based on MAC address + failover

In my company we have a relatively small network. Than we have 2 different WAN (via ADSL and SHDSL) connection behind 2 different hardware firewalls (Zyxel and SonicWall). Those are connected to our ...
3
votes
1answer
119 views

EFM vs Bonded ADSL [closed]

We used good old SDSL and load balanced ADSL in the past, and when the recession came and our office shrank considerably we switched to domestic ADSL Max line (from Be Broadband, which was very good) ...
3
votes
3answers
2k views

VLANs using one managed switch or link router to unmanaged switches?

I'm the resident IT guy in an office with about 20 workers, amongst 3 separate companies who sublet an office. We are wired with 24 ethernet ports dotted around the offices that all lead to a patch ...
2
votes
2answers
609 views

What DNS servers to use with multiple connections

I have a complex configuration of multiple ADSL connections from multiple ISPs being load balanced by a Draytek Vigor 3300V+ My question is what DNS settings should I use. Should I use the ISP ...
0
votes
1answer
162 views

Router in half bridge floods arp cache

I've set up a Slackware (14.0) box as a gateway for my adsl connection. I have a modem set up in half bridge mode between the NIC and the phone line, and the interface takes up the dynamically ...
0
votes
2answers
412 views

Routing DSL modem to web server

I am using "D-LINK DSL-2520U ADSL2+ ETHERNET/USB COMBO ROUTER" broadband modem. I hosted a web site using a web server in my PC (port 80). When I tried to access my external IP from my mobile, it ...
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votes
2answers
51 views

Can ISPs learn customers ADSL modem brand? [closed]

Can ISPs learn customers ADSL modem brand by any means?
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votes
1answer
204 views

How to have load balancing using 1 Ethernet card + 2 ADSL router

I have 1 Ubuntu 12.10 server with 1 eth0 (192.168.0.100) and it's connected to my switch. In my network I have 2 ADSL routers (192.168.0.1 & 192.168.0.101). How I can configure my server to act ...
1
vote
1answer
676 views

Connect from firewall to Cisco 877 in Bridged mode

I have a Cisco 877 in bridged mode acting as an ADSL2 modem only. My firewall is doing PPPOE and the internet works great. What I would like to do is give vlan1 on the Cisco 877 an IP address e.g. ...
3
votes
1answer
201 views

Running both ADSL2+ modem and LAN connection over a single Ethernet line?

We have two office locations, A and B. We have two ADSL2+ lines at both A and B, as well as a switch at both sites. At site A, the ADSL2+ line is plugged into a system running pfSense 2.x, that's ...
0
votes
1answer
420 views

What is a “Latency Outage”? [closed]

I'm one of many customers of Windstream, the only internet provider in my area, and just after having hit the 1-year mark of being a customer, my 10M internet connection became about a 512k ...
2
votes
2answers
2k views

How can I team or balance two DSL connections? [duplicate]

Possible Duplicate: Is there a sensible way of ‘teaming’ two ADSL connections? WARNING: I am NOT a networking professional (obviously, see below) but I am a programmer and have a decent ...
0
votes
1answer
459 views

Getting authentication window when browsing web sites on my server [closed]

I have a windows home server. When I browse from the net any web site in it I get an authentication window with the next message: "http://mydomain.com site requires user name and password, the site ...
-2
votes
1answer
512 views

How do I set up a VPN using Windows Server 2003 and a Netgear DG834 modem? [closed]

I need to create a VPN, so that remote users can dial in to our company network, to access resources on the network. I do not need a branch-to-branch VPN. I have the following: Netgear DG834 ADSL ...
1
vote
1answer
347 views

Connect ADSL modem SMC7904WBRA-N to CISCO RV082

I have a SMC7904WBRA-N ADSL modem/router that connects to the internet with a static IP given by the provider. I've received a RV082 to create a VPN connection which is having problems to connect to ...
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votes
1answer
197 views

Is my ADSL2+ speed locked by an ISP? [closed]

I signed a contract with my ISP for ADSL and internet speed should be 16 mbps. However, speedtest.net says I have only 7.5 mbps. Here's the router info: SNR Margin: 16.8 Line Attenuation: 25.0 Data ...
0
votes
2answers
702 views

Annex-A vs Annex-B ADSL splitters

While trying to improve our Adsl connection, I found that we use a splitter that is from an unknown ventor and have no clue whether is for AnnexA (PSTN) or AnnexB (ISDN) line. Is it possible that ...
0
votes
2answers
285 views

Windows VPN not authenticating from ADSL to Wireless link

I have a normal windows VPN on a computer connecting to a 196.201.x.x/24 IP. If this VPN tries to connect from any address in the 41.x.x.x range it cant get there. The server is a normal windows 2008 ...
1
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0answers
311 views

ADSL throughput loss from Reed-Solomon encoding

I'm reading about ADSL starting here and I am confused by how the Reed-Solomon encoding for ECC is limiting the available transfer rate, as much as it does (nearly half). This pdf on the same subject ...
0
votes
2answers
80 views

two network from one adsl connection,

If i use a telephone splitter at an adsl line and connect a VPN test modem and the existing modem to the output of the line splitter,can i get two network with different static ip address? I know this ...
0
votes
2answers
226 views

DSL :: Connection top speed is ok, but acceleration is low

My 2048 Kb/S ADSL connection downloads at the expected download speed 220 KB/s , but it takes too long to get to that speed, in other words the top speed is fine but the acceleration is terrible. This ...
2
votes
2answers
186 views

What is the point of PPPoE? [closed]

I am trying to expand my knowledge of networking beyond the basics. I have started reading about PPP, and how it is used in DSL modems with PPPoE and PPPoA. My first impression of PPP was "well that ...
5
votes
1answer
704 views

Juniper SSG20 - Bridge ADSL to ethernet interface

We're trying to reuse some leftover equipment we've got. I've got a Juniper SSG20 with 2x ADSL2/2+ mini-PIMs and we've already got a firewall solution (Which will act as the PPPoE Client) but what we ...
1
vote
2answers
5k views

Exchange 2007 Email Error 451 4.7.0 Timeout waiting for client input

Our SBS 2008 server with Exchange 2007 started rejecting some (most) emails starting about 3 or 4 days ago. The return failure message looks something like this: The error that the other server ...
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votes
1answer
2k views

How do I configure a Huawei b520 ADSL router to work in bridge way?

I have a much better router now, Cisco e4200 but I still have to use the Huawei b520 router because the internet connection is using ADLS. I want to configure b520 to act in a bridge mode and be ...
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votes
3answers
764 views

Webserver at home: will my DSL line be good enough? [closed]

The evolution of DSL lines and technologies such as FTTH has make me wonder if traditional hosting services could be in danger. If you want to host your own domain, for example for a blog or a ...
0
votes
2answers
501 views

Multiple WAN loadbalancing?

What's the best way to load balance multiple DSL LAN connections in a small office (circa 30 people). If there is a Cisco product that can do this, please recommend, as it will help comply with a ...
3
votes
1answer
3k views

Configure Cisco 877 as bridge between Internet and Cisco ASA 5505

ISP ADSL ---- Cisco 877 Router ---- Cisco ASA 5505 I have the above connection. I'd like to avoid using NAT on the Cisco 837 router, and just put the ASA directly on the Internet. However, I have ...
0
votes
1answer
175 views

TCP connection hangs after transferring 1024 bytes

I'm having a strange problem on a connection behind a Cisco modem connecting to a DSL network : outbound connections hang after transferring exactly 1024 bytes. Inbound connections are just fine. This ...
0
votes
1answer
415 views

wic card not recognised - cisco 2821

I've installed a new ADSL2+ supporting HWIC1 card in a cisco 2821 router but its not being recognised. Any ideas why it might not be seeing it? %GT96K_FEWAN-1-UNKNOWN_WIC: NM slot 0, wic card has an ...
0
votes
1answer
836 views

DHCP requests from wlan client not reaching server

I have a dhcp (and dns) server running on a centos/linux pc, which is the only dhcp server on my network. I have two wireless routers - a Netgear DG834G, and a Netgear DGND3700. The DGND3700 is also ...
0
votes
1answer
77 views

Which brands of wireless routers and DSL modems care about security? [closed]

Which vendors have established a strong security process during development where they educate firmware developers about security issues, arrange security engineers to review the code, accept ...
1
vote
0answers
300 views

Cisco 678 Will Not Work using PPPoE

I am attempting to configure a Cisco 678 because I am totally sick on my Actiontec. However, I am running into some problems. It seems as though the Cisco is able to train the line, but I am unable to ...
1
vote
1answer
108 views

Win 7 Network Configuration Issues [closed]

I have US ROBOTICS ADS L 4 PORT router and I use it to connect to the internet using my desktop. I bought a new Toshiba laptop. So I connected it to router using the same wire disconnecting the ...
3
votes
1answer
437 views

Is wiring ADSL and Phone lines to a patch panel ok?

Is it OK to wire an POTS line + ADSL line directly into a patch panel? I guess I'm wondering as well why do regular phone jacks have some passive electronic parts inside them. Since wiring it ...
0
votes
2answers
1k views

Recommendation for ADSL modem/router that supports multiple servers w. static IPs?

I have what doesn't seem like all that complicated a network in my home: I have a block of 8 (= 5 usable) static IP addresses, which are assigned to five externally-visible servers; I also have a ...
1
vote
5answers
719 views

How do I bond ADSL lines for VOIP?

We're using G711a as a codec, and I wanted to bond ADSL lines to give me the maximum possible upstream. I know that there can be issues of packet re-ordering etc; what is the 'right' way to do this? ...
0
votes
2answers
239 views

Windows XP PC cannot resolve external domain names without dialup connection

I'm trying to connect a Windows XP machine to the Internet via my router / ADSL modem at home. When I set up a dialup connection, the machine is able to resolve external domain names. When I just plug ...
5
votes
3answers
1k views

Two ADSL modems on one LAN

At the moment we have two buildings each with their own LAN's and each with their own internet connection through an ADSL modem, using their own seperate telephone line. Next week we are going to ...
2
votes
2answers
254 views

Is it possible to use two ADSL cables together, jointed?

Hey there. I have two different ADSL lines, and I'd like to use them together in order to get double speed and bandwith. Is it possible? Is it something a software or hardware? How can I do it? ...
0
votes
2answers
1k views

Disable internet access for a single computer

In our network, we are connected to the outside world with an ADSL modem. A (wireless) router is connected to this ADSL modem, which provides wireless access to 3 laptops, and a USB connection to a ...
0
votes
4answers
1k views

how to control the bandwidth in LAN with no server?

i have an ADSL line with a router attached to it. the router is attached with a switch. and with this switch, i have 3 PC connected each sharing the internet connection. i there any way to distribute ...