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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2answers
86 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
177 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
97 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
64 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) ...
2
votes
3answers
775 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 ...
1
vote
2answers
205 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
126 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
1answer
41 views

Internet Speed Requirement Calculation

I'm asked to provide information and a estimation for a planned congress that will take place in a big venue. There will be about 300-500 guests. Half of them are likely to connect to the internet. ...
-3
votes
2answers
45 views

Can ISPs learn customers ADSL modem brand? [closed]

Can ISPs learn customers ADSL modem brand by any means?
1
vote
1answer
107 views

Web ERP slow response when somebody upload files in an ADSL connected office

We have developed, and deployed, a web ERP for various small companies (less 30 users each one). Those who have cable connection don't experience any problems related with slow connections, but one is ...
-2
votes
1answer
176 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
322 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. ...
0
votes
1answer
331 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 ...
1
vote
2answers
875 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
253 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
362 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
256 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 ...
-1
votes
1answer
137 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
484 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
228 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
vote
0answers
220 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
182 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
165 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 ...
1
vote
2answers
4k 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
1k 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
552 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
455 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
2k 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
166 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
617 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
73 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
262 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
103 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
363 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
967 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
589 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
225 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
822 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
247 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
632 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
878 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 ...
0
votes
1answer
851 views

ATT DSL and Juniper SRX w/Integrated Modems

Here's what I'm trying to accomplish: Existing Setup: 2 x Netopia ADSL 3347 Gateways that are each connected to a Juniper SSG140 via Ethernet. The Netopia boxes appear to each have a PPPoE interface ...
0
votes
3answers
840 views

Setting up VPN access over home dsl router?

I have a ADSL connection at home, however it is not static ip address based, and the ip changes every couple of hours. here is how the setup looks like Internet ------ ADSL Router --------Internal ...
1
vote
3answers
421 views

What is the maximum speed of ADSL?

As wikipedia says the max speed of ADSL is 24.0 Mbit/s. However here it writes that Japan provides ADSL service with speed 50 Mbit/s.
0
votes
2answers
373 views

Limited bandwidth using wireless modem

I would like to set up a couple of wireless modems in a mall but limit the access to wireless by 10MB per user. Is there any good software I can use to manage this? Many thanks!
0
votes
1answer
463 views

How to install GNU/Linux on ADSL router to setup internet watchdog?

What model of ADSL modem/router by major market brand can be used to install some distro of Linux to setup a watchdog to initialize connection by demand in case for example of main internet connection ...
0
votes
3answers
103 views

Whats the best router for 4 machines?

I have an ADSL with 4 public static IP Addresses. I wish to hide my larger network behind another router what is the best way to do this? I don't want to use a PC with 2 NICS but ideally I want it ...
2
votes
5answers
1k views

Device to manage 2 dsl connections - failover, load balancing and bonding

I'm setting up an offsite DR facility on a budget. The office has 2 ADSL lines coming in to identical router/modem devices. I'm looking for a cost effective (cheap) way of joining the two connections ...
0
votes
1answer
489 views

Strange 2Mbps limit for single tcp connection on 24Mbps ADSL2+

I've D-Link DSL-2500U/BRU/D, ADSL mode is "ADSL2+ AnnexM EU-56", configured as bridge and connected to linux (Gentoo) workstation. Line is good enough, I've stable speed 2.09MiB/sec (i.e. about ...
0
votes
3answers
249 views

Why does a power trip “disable” internet connectivity?

At home, we've set up a server with Windows Server 2008 R2. This server provides DNS, DHCP and a number of other services for the network. We have a Cisco Router (not sure about model) that manages ...