WAN refers to Wide Area Network

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16
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4answers
489 views

Starting a branch office on the other side of the world

Going to cut right to the point on this question, as I'm after as diverse range of solutions as possible so don't want to effect any opinions with the question too much. Client is a UK based ...
16
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3answers
2k views

Troubleshooting Network Speeds — The Age Old Inquiry

I'm looking for help with what I'm sure is an age old question. I've found myself in a situation of yearning to understand network throughput more clearly, but I can't seem to find information that ...
9
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1answer
2k views

Ethernet interface errors

My Ubuntu servers ethernet interface that connectes to ISP's multiplexer shows errors. Here is the snapshot: RX packets:204564288 errors:3193970 dropped:0 overruns:0 frame:3138402 ...
9
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1answer
6k views

Is Branch Cache worth considering as a replacement for DFS-R

We have a small stub office that currently has a single server 2003 domain controller, and a DFS-R copy of the file store held at our main office. We probably replicate about 100Gb of data, I would ...
8
votes
4answers
10k views

ZFS Sync over unreliable, slow WAN. ZFS replication, or rsync?

I've been tasked with making an off-site backup work over the WAN. Both storage boxes are FreeBSD based NAS boxes running ZFS. Once or twice a week, 15-60 gigs of photography data gets dumped to the ...
7
votes
6answers
6k views

How should I copy my VM templates between vSphere datacenters?

Background/Environment Architecture: My current environment for $corp_overlords$ is set up in a hub-and-spoke model with a technologically well-endowed home office hub (SAN, bladecenter/bladesystem ...
6
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1answer
4k views

iptables - allow connections only from LAN

Is there a way to deny all external traffic (WAN) to SSH and allow only local traffic (192.168.0.1 to 192.168.0.255) and what would be the rule?
5
votes
1answer
373 views

What kind of fiber is used in Intercontinental connections? Are repeaters used?

I'm curious about the underwater Internet infrastructure that interconnects continents to each other. Can anyone elaborate on how it works, or any other details (such as security) of these wires?
5
votes
1answer
1k views

Draytek Vigor 2820 static IP's

I have a Draytek Vigor 2820 router which is connected to our ADSL provider (British Telecom, BT). We currently have one static IP address which is accessible from anywhere outside of our network and ...
5
votes
4answers
307 views

Are there any statistics on the number of networks using Ethernet Jumbo frames?

I am often told by Sales Engineers and Product managers that a Layer 2 Ethernet service is not fit for purpose if the maximum supported frame size is in the 1518-1522 range (enough to support standard ...
4
votes
6answers
4k views

How do I point my browser to a specific NIC on my machine

I am on a local area network that has no external access to the internet. However I have been tasked to find a way to allow certain machines to access the web (HTTP, HTTPS, etc) via a wireless card ...
4
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6answers
10k views

Bandwidth sizing for simultaneous RDP sessions

We're doing some DR scenario planning which will require up to 150 users to RDP into their desktop machines (mainly running Windows XP) over our VPN. We have a 2mbit uncontended internet connection at ...
3
votes
4answers
160 views

Possible Issue With (what I think is) a Virtual Network

This really isnt my area of expertise...and it may be obvious, but here it is: We have what I guess you could call a virtual network. We have 4 locations in 4 cities connected by broadband internet ...
3
votes
5answers
350 views

Where to find information on the IPv4 crunch, why to worry, what to do?

Where do I get information on the IPv4 crunch (what will happen, transition to IPv6, etc.)? What should one do to prepare (if anything)? Ars Technica ran "A decade's worth of IPv4 addresses" and ...
3
votes
2answers
2k views

Does two pfsense + CARP necessarily require two WAN IP?

I am looking to setup CARP following this guide across two pfSense firewalls. I have setup CARP before on a WAN link with a big IP space, so allocating a distinct WAN IP per each device (as shown in ...
3
votes
6answers
577 views

WAN Design Questions

I've been tasked with redesigning our company's WAN in North America. We have two offices in the U.S., one in NY and one in the midwest. We also have offices in Europe. I won't be touching anything in ...
3
votes
4answers
2k views

What are the advantages/disadvantages for using a single strand of fiber for a full-duplex link?

I have seen telcos install one-strand fiber links at full-duplex, but haven't found much documentation about this configuration. What are the bandwidth limitations, troubleshooting complications, ...
3
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2answers
150 views

Increasing speed between buildings above 1Gbps

I am looking for options to increase the speed between buildings, ideally without having to replace existing fiber. Current situation: Multi-building campus, with Gbps fiber links between ...
3
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3answers
656 views

Small TCP Window on WAN between 2 Locations

Site A: Denver datacenter. 60MBPS. Site B: Chicago. 100MBPS. ICMP pings: Packets: Sent = 176, Received = 176, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 74ms, ...
2
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3answers
293 views

Alternatives to the Cisco “Windows Server on WAAS appliance” for satellite office usage [closed]

We need to deploy RODCs to many small satellite offices where we may want additional lightweight infrastructure there too (file, print, dhcp) Are there any networking devices that include RODC ...
2
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8answers
3k views

Large File Copy Tool accross Flaky Connection

I am looking to copy some large files accross a flaky WAN connection. Is there a tool I can use which will auto resume when the network fall over briefly and let me manually resume if I have to fix it ...
2
votes
2answers
2k views

DNS resolution failing over to secondary DNS - why?

We have large number of branch offices connected via VPN, but without any kind of server infrastructure. The client machines in each office get their network configuration from an ASA 5505, which is ...
2
votes
3answers
3k views

Feasibility of Windows Server 2008 DFS replication over WAN link

We have just set up a WAN link that connects two buildings in our organisation. The link is provided by a 100-Mbps point to point line. We have a Windows Server 2008 R2 domain controller on each side ...
2
votes
3answers
189 views

Cisco ASA and Cisco Switches, how do I determine top senders / receivers?

I'm dealing with a high bandwidth situation and need to determine what host is sending / receiving the most data. How can I get the logs necessary that will contain this information? I'm OK with ...
2
votes
3answers
1k views

Linux WAN failover simple solution needed

I'm banging my head against the wall to come up with a clever and simple solution to WAN failover. This is for a SOHO installation with two different external IPs. Only outbound connection failover ...
2
votes
3answers
13k views

How to setup dual-wan trunking but keep one as main… (Weighted round robin, Least load first, spillover)

I'm working on setting up a zywall USG-100 firewall. I can get everything to work but now I'm trying to get the 2 wans to work correctly. They both work individually but I'm having trouble with the ...
2
votes
2answers
180 views

Possibility of WAN Optimization for SSH traffic

While I do understand that SSH by itself is a very low bandwidth utilizing protocol, it is sometimes choking up bandwidth during peak hours in our office environment. I want to know if at all it is ...
2
votes
2answers
110 views

AWS - Optimize WAN link between VPCs [closed]

I have 2 VPCs, one in us-east-1 and another in ap-northeast-1, with an OpenVPN tunnel between them. According to my ping test, the latency between the two regions is ~160-180ms. Assuming all services ...
2
votes
2answers
667 views

What is WAN IP relating to static IP leases?

When I asked my what is my static IP leases, I got the reply: ISP WAN : xxx.xxx.228.117 Customer WAN: xxx.xxx.228.118 Lan IP: xxx.xxx.194.112-127 May I ask What is the ISP WAN and Customer WAN? ...
2
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4answers
3k views

Traffic redirect in Router

I have two routers connected to each other. Both the routers are connected to the WAN using two different ISPs. Router A is used for the day to day browsing in the office while Router B is connected ...
2
votes
4answers
4k views

Outlook 2007 slow connecting Hosted Exchange on LAN only

Were migrating to a hosted exchange service from rackspace.com from an in-house exchange server. Outlook 2007 on the LAN where the in-house exchange server is located connecting to the hosted ...
2
votes
4answers
518 views

Network Latency over WAN

Let me take a minute to explain the background of the challenge I am facing. My company has offices in US and Asia. The users work on large CAD files. The office in US has NAS (Network Attached ...
2
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3answers
175 views

Accessing the servers via their WAN IPs from the internal network - connect them to LAN too?

Currently we have a few servers behind a router/gateway, which is in bridge mode, so the servers have directly assigned WAN IPs with no NATting performed. This works as expected. There is, however a ...
2
votes
2answers
572 views

Managing a DNS on a Local Private WAN Network

I am in need of some assistance figuring out how to set up a DNS on my private WAN network. I currently use a Linksys e4200 wireless router to connect all of my computers, servers, and other devices ...
2
votes
4answers
4k views

DFS-R or WAFS for Syncing 1TB Files between remote sites

We have 1TB of files that we wish to keep in sync between three locations. This data consists of around 1.5 Million files which grows/changes at an average of 100MB/day. The first location is a ...
2
votes
2answers
127 views

How can I verify the integrity of a WAN connection?

We have two scanners in our branch office which upload images to the head office via FTP. In the last week, both scanners have started delivering a lot of corrupted images. I suspect that the problem ...
2
votes
2answers
1k views

SMB2 traffic crashes network?

We've been having significant network slowdown issues over the past few weeks, primarily on a Friday morning. We run Windows 7 client machines, with Windows Server 2008 R2 servers. What generally ...
2
votes
2answers
379 views

Need help choosing main cisco WAN/firewall unit ($20kish budget) [closed]

Our IT director has left for greener pastures, and I'm acting as the interim director while we find someone new (I manage the Helpdesk). He budgeted about 20k for a new front end to our internet ...
2
votes
2answers
103 views

Simulate HPC application data to test WAN filesystem performance over a large link

So here is the setup: we've got temporary access to a very large TCP WAN connection and we want to use this pipe to do WAN filesystem testing. We would like to generate massive amounts of data on ...
2
votes
2answers
326 views

Ethernet over copper thoughts

We currently have 2 DS1 lines in a multilink configuration delivering 3mbits. It works well, but we could certainly benefit from more bandwidth. As I was talking to our sales rep at XO communications, ...
2
votes
4answers
496 views

Best practice to share or allow access to trac and svn to wan internet users security?

What is considered best practice for sharing or allowing users from the internet that are not company related to have access to trac and svn? Should it be on a DMZ, should it be internal with some ...
2
votes
1answer
101 views

how to block access from bridge mode vpn nodes to my wan gateway

We have a tap bridge between 2 local networks. It work great except that clients from the 'other' network can use dhcp server and most important can use wan gateway of the second network which is bad. ...
2
votes
1answer
112 views

Utility that use the bits service to copy files

I would like to know if there is a utility that uses the bits service, to help me transfer some large files over a wacky wan connection. These files happen to be available via a UNC share. Any ...
2
votes
1answer
797 views

Block wan request is on. 3CX system

I am trying to connect to my 3CX PBX on an amazon ec2 windows server 2012 instance. I have created the security group, and added exceptions in the firewall. The firewall checker in the 3CX control ...
2
votes
0answers
38 views

Local Lan design to support Multiple WAN

We have about 25~30 serial dedicated lease line or ADSL link using router to connect to different financial companies to do some transactions. SCurrently we have a very large L2 (/20) to host our ...
2
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0answers
304 views

Forward Error Correction for WAN optimization

Anyone know of user-space tools providing forward error correction with/for tunnelling a stream over UDP on Linux? I found Trafficsqueezer, utunnel and toutunnel which implement TCP over UDP, but ...
2
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0answers
206 views

Two separate WAN uplinks for two different NAT networks

I have a server running ubuntu 10.04 with four interfaces. eth0 and eth1 have static WAN ip's, and eth2 and eth3 are connected to two separate NAT networks 192.168.0.0/24 and 192.168.1.0/24 ...
2
votes
0answers
193 views

network mount across WAN [closed]

I have 2 networks separated by a WAN (25/25 fiber optic VPN). I would like to provide some files to both servers on networks via NFS (and Samba for the desktops, but that's on a per-site basis). some ...
1
vote
5answers
3k views

For remote IT purposes, VPN or WAN?

I work for a small insurance company that only has 2 offices. Right now, if something goes wrong in another office, it's just a short road trip. But... This company is expanding, and will have 4-5 ...
1
vote
4answers
804 views

Can we connect LAN (Ethernet) with a wide area network?

Suppose we want to connect a local area network (Ethernet) with a wide area network, the question arises is, can we connect a local area network with wide area network? If we directly connect the ...