0
votes
0answers
20 views

How to monitor DNS server activity on a Cisco router?

I have a Cisco 887 router (running IOS 15.4) which also acts as DNS forwarding server for a small network: ip dns server ip name-server A.B.C.D Is there any way to log/monitor/debug the DNS queries ...
-1
votes
2answers
47 views

Forward Clients to New Server using iptables

Clients are connected to a server A by connecting to the domain name address www.example.com:4444, where www.example.com resolves to the IP address of server A. Question: In order to provide a ...
0
votes
0answers
82 views

Clients do not see DHCP Server… what am I missing?

Old router died and just got the new one in and I can't figure out what I'm missing to forward dhcp and dns to windows server 2012. Old router was a netgear R6300, new one is an N900. Before the ...
2
votes
1answer
282 views

How to statically configure DNS servers on a Cisco router when the WAN interface uses DHCP?

I have a Cisco router (model 887VA, IOS 15.4) used to connect a LAN to the Internet via ADSL. The WAN interface uses DHCP: interface ATM0.1 point-to-point ip address dhcp I need the router to use ...
0
votes
2answers
137 views

Configuring DNS with router and BIND

Goal I am trying to setup a local DNS server here in our office. Problem Apparently Comcast has a loop-back so when we configured the domain to go to our IP it works outside of the office but ...
1
vote
3answers
1k views

How to block external access to the DNS service running on a Cisco router?

I have a Cisco (877) router acting as the main gateway for a network; it has a DSL connection and performs NAT from the internal network to its external, public IP address. The router allows SSH ...
0
votes
1answer
179 views

Forward DNS requests from router

I've got a server behind a router and I'm trying to use my server as my DNS and DHCP service. I have them configured correctly, and I can connect out through, but I cannot seem to get my router to ...
-2
votes
2answers
63 views

How do home routers offer DNS services [closed]

I have a typical home router/switch DSL modem that provides to my home network with all the common services (DHCP, DNS, web etc). The client machines have in /etc/resolv.conf as nameserver the IP of ...
0
votes
1answer
49 views

port 53 works through router but not without it

I have a linux server behind a Comcast business gateway. The gateway has two static ip addresses. I want to forward ports 25, 53, 80, and 143 for both ip addresses to the server. Within the gateway ...
0
votes
1answer
576 views

DNS server in use is not that as specified in TCP/IPv4 properties. Why? [Windows 7]

I have been able to work around my issue, so I am not looking for a solution, but I am looking for an answer as to why I am seeing the behaviour as described here: Context: I'm developing an ...
0
votes
2answers
928 views

Use LAN DNS server when unqualified domain names are requested

I'd like to be able to serve unqualified domain names like "pos" or "website" from my DNS server on my LAN and have regular DNS queries like "google.com" be served from my router. On my router, under ...
1
vote
1answer
3k views

Bind FORMERR errors in syslog

I've recently switched out a failed router... and, a while later, I discovered a lot (at least an order or magnitude more than the number of queries) of errors reported in /var/log/syslog - of the ...
0
votes
0answers
56 views

Networking and wireless router help

I have 2 questions that I`ve been hitting my head on We have a network with 24 users. The network is behind a sonic wall and are server is behind the sonic wall with the rest of the network Are ...
2
votes
2answers
3k views

Local DNS server (bind) and the router DHCP

I just set up an internal http server for internal use (I set up Redmine), in a small network (30 or so PCs). I set up the http server on a virtual box ubuntu, that runs also the DNS server (bind). ...
0
votes
1answer
509 views

Hosting a WCF Service on IIS in a LAN without internet connection

This is probably a very simple fix, but I can't figure out what is wrong. I have two computers connected to the LAN ports on a D-Link WiFi router. I do not have an internet connection. The WiFi ...
2
votes
1answer
218 views

Intermittent internet access on a flat network - Router is connected [closed]

I’m looking for some help with network settings. I’ve just started a new job (non-IT!) and we have problems with our office network. I’m the most IT literate in the organisation (15 permanent ...
2
votes
3answers
590 views

DNS for private network - should router be the DNS server?

I want to set up BIND for a private subdomain on a private network, like in the question here: How to configure bind for a private subdomain? My question is this - should my (linux) router act as the ...
-1
votes
1answer
74 views

Malicious program changing my DNSs [closed]

Some weeks ago I started having problems with my internet connection, it was extremely slow and suddently some websites (specifically gmail, facebook, youtube and twitter) started failing to connect, ...
-2
votes
1answer
201 views

How does a proxy server forward reply to the client?

A proxy maintains anonymity, i.e. the server replies to the proxy thinking that it is the client. now after receiving the reply fro the server, how does the proxy server forward the reply to the ...
0
votes
3answers
235 views

How do I configure my router as a DNS server?

I have a question regarding router configuration: How can I configure it to direct certain packets sent to certain addresses (like Facebook, Youtube and other procrastination sites) to be sent to a ...
3
votes
1answer
361 views

Force to use specific DNS provider at network

OpenDNS offers a quite simple way for internet filtering by categories. Of course who could get the correct IP address can easily bypass the filter but it would be enough for my expectations. The ...
2
votes
1answer
424 views

DNS Server address configured inside Router not working

Well, I have an ISP router in which I have configured DNS Servers to use (Primary & Secondary) like Google DNS. It works just fine. But now I have setup a computer with DNS server (Simple DNS ...
2
votes
1answer
391 views

DNS Servers being block by my router despite being allowed in the firewall

I see entries like this in my router logs: src=8.8.8.8 dst=108.x.y.z ipprot=17 sport=53 dport=54789 Unknown inbound session stopped 8.8.8.8 is a DNS server. A few questions regarding this: ...
2
votes
3answers
460 views

Suggestions for Method of access restriction in organization

I want to stop employes of using social media and other sites i might think i dont want them to visit, yet there are some times we need to use it so i need some flexible customizable solution. I ...
0
votes
5answers
338 views

Given WAN IP, how to find out the LAN IP?

I do not have access the the gateway router so I cannot look up the forwarding rules. In a Windows network environment, how else can I find out which host the WAN IP is forwarded to?
3
votes
3answers
205 views

Understanding DNS cache poisoning

I have just read this article on DNS cache poisoning, and while I understand it, am I right in saying that DNS cache poisoning is impossible when the server is behind a router using either an address ...
0
votes
6answers
3k views

cisco router : redirect any dns request to my own dns server

how I can redirect any DNS request from the client with my Cisco Router 2621XM. I want to redirect any dns request to my own dns server. So if the client has set the dns server in their ip address ...
0
votes
1answer
214 views

Basic ASA 5505/DHCP/Routing Help

I have been given the task of bringing multiple development servers currently living a mile away in-house and configuring the network to accommodate them. I've done little more than stick jack A into ...
1
vote
1answer
276 views

Is it possible to separate Routing/NAT in conjunction with an internal DNSMasq host providing DNS/DHCP?

It's really great letting DNSMasq take care of DHCP / DNS, as it "just knows" everything... as it should, considering it dished out the addresses to the hosts... However, it seems (to me) - ...
0
votes
1answer
72 views

A Tale of Two Domain Names - One resolves the other fails

I have setup two domains on a server local to my LAN. The first one is registered with GoDaddy and resolves fine behind the router. The Second domain is using zoneedit.com to handle the dns ...
0
votes
1answer
642 views

Mac Mini server (10.6) behind router with FQDN hostname

I have a Mac Mini running Mac OS 10.6.6 Server that will be part of a local network, and a static IP from my ISP. I'd like to set up DNS for the Mini with a FQDN as the hostname (example.com) ...
0
votes
2answers
313 views

client flips between internal and external IP addresses?

I have what seems like a not-particularly-complicated home network, all things considered: a DSL line comes in to a modem/router, which goes off to a switch, which supports a bunch of machines. My ...
2
votes
2answers
1k views

Linksys RV042 DNS problems

I have a Linksys RV042 router, hooked up in a fairly standard configuration (only using one WAN port - hooked to a cable modem). DNS lookups from systems on the LAN are failing intermittently. This ...
0
votes
2answers
256 views

My Domain returns the routers default page (hosted on server in the same network)

Hello I have setup an Apache/PHP/MySQL on CentOS 5.5 with and have installed WebMin on it. I would like to take my server online. And try to host multiple sites on it for my research. My current ...
2
votes
3answers
299 views

Collecting routing information from RIPE?

I would like a way of collecting ip blocks for known networks in the RIPE database. Take this search result as an example: ...
1
vote
2answers
190 views

Bind an external and internal ip together

I have an ActionTec MI424-WR router that has 5 external IP addresses bound to it. One of the servers behind the router is a mail server on an internal address. When the mail server receives mail, it ...
0
votes
3answers
150 views

Setting up a DHCP server

I have a DNS server on my LAN that the machines in our office need to use. Some of these machines are laptops which get taken out of the office regularly, so it causes problems if we hard-code the ...
0
votes
2answers
407 views

Ubuntu server behind 2 routers dns problem

I come from stackoverflow and I am looking for a sysadmin guru who can solve my problem. I have a 2 router + "server" configuration. the first router (router A) has ip range 192.168.2.1 - 254 the ...
1
vote
2answers
1k views

Zyxel P-320W: How to connect to my web server using public IP

My company's router is Zyxel P-320W and I have a public static IP. I registered a few domains name and point to this IP address. I already setup Virtual Hosts and configured port-forwarding to my ...
0
votes
3answers
411 views

DNS Piority in home-use Routers

Force DNS on router instead of ClientSide DNS like OpenDNS or GooglePublicDNS Im trying to implement some site blocking using DNS, the hardware is simple Routers like Linksys and Netgear that you use ...
0
votes
1answer
580 views

DNS Server and Private HTTP / SOCKS Proxy

this is just a small hacking attemp to our router. I'm trying to setup a small DNS and forward webpages through proxy behind the scene. I've successfully implement the DNS server that will do the ...
0
votes
2answers
553 views

connect two ESX hosts on private LAN

can a PC setup as W2K3 DC manage two ESX hosts connected to physical hub/switch? Services: DNS, DHCP, Domain distributed to host using a hub/switch. NIC2 on each host connected to ...
0
votes
3answers
76 views

The network routes A.com and sub.A.com so differently

Route is based on IP, right? How does it possible to route my packets so differently? One is success, but another is not. # traceroute A.com traceroute to A.com (1.2.3.4), 30 hops max, 60 byte ...
0
votes
2answers
939 views

Netgear FVS318g Problem Resolving Local Connections by Name

Does anyone know if this router perfoms local dns caching for the DHCP connections it dishes out locally? I cannot seem to access any hosts connected to it by name, although the connected hosts are ...
0
votes
2answers
2k views

Troubleshoot intermittent router DNS problem

I'm hoping one of the many network gurus here can help me with a problem that just started to happen on our office network. We have a Linksys RV082 router; short description of the problem is that ...
0
votes
4answers
750 views

Pinging DHCP clients by name

The office has a small LAN, composed by a Linksys WRT54G2 sharing a DSL connection, a hub, and several wired and wireless clients. DHCP is enabled in the Linksys. The DHCP clients table shows the ...
1
vote
4answers
935 views

Problem with my dns server

I have a linux server with a bind daemon running on it. Until yesterday all worked like a charm and then suddendly it stopped to. Because the named-daemon was still running and dns queries within my ...
2
votes
3answers
544 views

Forwarding hostheaders

I have a question about forwarding of the hostheader inside a network. My setup is this: - On the front I have a Linksys router - Behind the router I have 3-4 test webservers with different setups - ...
3
votes
5answers
8k views

Internal DNS with DLINK Router

Using a DLink 2640-T (ADSL2+Router). It cant resolve the internal hostnames. The manual is pointing to the firewall settings of the router to switch off the DNS-Blocking from external (which doesnt ...
5
votes
10answers
1k views

Very strange home router problem [closed]

For a long time now I've had a very strange problem with my wi-fi network at home. I have a BT Voyager 2100 ADSL modem and an iMac, ageing PowerBook and a PC that connect to it wirelessly. The problem ...