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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10 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
29 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
41 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 ...
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3answers
233 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
106 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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5answers
2k views

Is there a sensible way of 'teaming' two ADSL connections?

I work in an office complex that has two seperate ADSL connections, which they use to provide two seperate networks (actually both the ADSL routers go into a Cisco managed switch with two VLANs, one ...
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votes
2answers
182 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 ...
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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 ...
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1answer
406 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: ...
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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 ...
0
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0answers
134 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
105 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
482 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
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2answers
379 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
1answer
157 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 ...
2
votes
5answers
2k views

Link aggregation with DSL and Ethernet, and different ISP's?

We're a webdev company that has outgrown its ADSL bandwidth. It's currently 4/1 Mbit/s and due to distance we can't simply get faster DSL, whether ADSL or SDSL. Stacking multiple DSL connections is ...
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votes
2answers
50 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
203 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
635 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
196 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
408 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
404 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
497 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
336 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
185 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
662 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 ...
5
votes
1answer
687 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 ...
0
votes
2answers
273 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
297 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 ...
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2answers
79 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 ...
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votes
2answers
216 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
183 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 ...
3
votes
2answers
734 views

MTU, DSL router and stalling TCP

I am discovering stalling TCP connection problem. The problem arises when I try to scp stuff from remote system from my home network. My home network is connected to internet via PPPoE (ADSL+) and ...
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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 ...
1
vote
0answers
293 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 ...
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
2answers
496 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 ...
1
vote
2answers
110 views

Components needed for a VPN

first of all, I asked this question on SuperUser.com, but no one there could help me. Well, we eventually got our Mac Mini Server. We now want to set up a small Remote Access VPN using this Mac Mini ...
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votes
3answers
733 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
1answer
2k views

ADSL and routing (bridging) problem with DLINK 320B and Fortinet Fortigate 60

Internet <---> 320B (ADSL modem) <---> Fortigate 60 (firewall) <---> lan The ADSL line is with static IP, with username and password and with pppoa. The web interface of the DSL 320B allows ...
0
votes
1answer
966 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
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
406 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
4answers
1k views

Advice needed: ADSL and VPN for a small company

I need advice on purchasing an ADSL modem/router for a small company. At the moment, we are using the iBurst Wireless service for internet connectivity. I have the iBurst desktop modem, which ...
0
votes
1answer
781 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
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
431 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 ...