Routing / Networking
Mar 16, 2007
I'm experiencing some odd issues, I have a cpanel setup, however on port 2086 the server is currently listening however on port 80 it fails to listen. Apache is running and no errors appear in the errors log.
Running ifconfig shows that there are errors and dropped packets.
I was changing ip routes earlier that day however all seems fine...
Oddly I can ping internally on the network and noticed a number of other servers in the broadcast range. These respond fine, however pinging google or outside the data center fails.
ping google.com
ping: unknown host google.com
HTML Code:
eth0 Link encap:Ethernet HWaddr 00:14:85:3D:A2:20
inet addr:122.252.4.* Bcast:122.252.4.255 Mask:255.255.255.0
inet6 addr: fe80::214:85ff:fe3d:a220/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:289198921 errors:4 dropped:182 overruns:0 frame:3
TX packets:230175646 errors:19 dropped:0 overruns:0 carrier:19
collisions:8927682 txqueuelen:10
RX bytes:3521641159 (3.2 GiB) TX bytes:2563591520 (2.3 GiB)
Base address:0x2400 Memory:dd100000-dd120000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:127443475 errors:0 dropped:0 overruns:0 frame:0
TX packets:127443475 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1102069037 (1.0 GiB) TX bytes:1102069037 (1.0 GiB)
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Apr 30, 2009
I have a linux server that has a few gigabytes of data to retrieve off this system. I'm trying to network with so I can have outbound access to sftp into another server to relocate the files. I'm unable to ping google.com or access this other server. I tried setting it up using dhcp and static information, I've rebooted network protocals, I'm still unable to access any thing. Does anyone have any suggestions on what I could try next?
The machine is running fedora, no GUI only command prompt.
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Nov 20, 2008
I am currently looking for a managed hosting solution for a small start-up.
The site will have a repository of articles in it, these will initially solely consist of documents (av. 2mb in size) and (based on performance) may be expanded to containing video/audio, however this is not likely to happen within (at least) the next six months.
The site will be running on a Linux server (we will not be considering any Microsoft products), using PHP 5 and MySQL 5. There will be a registration form and users will (based on performance) eventually be able to upload articles to the site.
We have contacted various hosting providers (am in talks with Rackspace, Rochen and Network Redux) and have had everything from SAN to a 500GB (RAID 1) recommended to us.
As the site is still currently in Beta with nothing in it and proposed launch date is March 09, I would be grateful if anyone who was in a similar position could inform me how their infrastructure evolved as the site demanded more resource.
I would like to take this opportunity to thank you for taking the time to read my query.
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Aug 5, 2008
Do you think boonex dolphin script is good? and it is better than paying for such similar script? because my intentions is to launch a free website
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Sep 30, 2007
I have a question: I was asked this on an interview, now I am good at home networking but nothing enterprise and this was not for a networking position but for data entry and possibly some ASP NET coding.
I was asked if you had two nics on one server each connected to a seperate switch with different IPs and subnets what possible problems could arise?
Note I am curious about this I do not plan on leanring more about networking then curiosity which this is.
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May 1, 2007
I am getting confuse about all those companies and reviews. All reviews tell you different story. Please tell me which review site is reliable and they don't put good review of company just because of affilate.
I need VPS for starting and once we get enough users we will take dedicated. So which VPS hosting company should I choose to start with minimum?
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Dec 23, 2007
I have 3 computers networked, 2 of them connects to each other for filesharing just fine, but the 3rd one is having problems.
on the 3rd computer, it can access the other 2 for file sharing, but is 'NOT' accessible from the other 2. when try to access the 3rd computer through 'network places', i get the error: "//COMPUTER is not accessible. You might not have permission...."
however, if I actually type in "COMPUTERsharedfolder" - to access the 3rd computer, I can, so basically, I CANT access "COMPUTER" but CAN access "COMPUTERsharedfolder" ..
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Oct 19, 2007
Recently, I installed VMWare Server 1.0.4 on my dedicated server.
When I tried to install my private IP on my VMWare, I had no clue how to do that. I used NAT networking to share my main OS with my private VPS, but when I try to run a service that needs the port XXXX to be open, it wouldent let me use it.
For an example, my main OS IP is 82.00.000.000. My VPS is sharing the same IP address with the main OS. I tried to run an Apache service on my VPS, but when I try to access it by the IP 82.00.000.000 it gives me a connection reset page.
This also happens on other services like FTP and stuff.
My VPS is running Windows XP Professional SP2 with a legal retail license and my main OS on the server is CentOS 4.5
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Jul 17, 2007
I really need some help with a new server I just got over at SL, I have windows 2003 and vmware server installed and I want to have 2-3 vmwares running websites each on port 80 and each having a separate external ip.
I have contacted SL and they have set me up with the vlan and extra ips I need I have enabled IP forwarding on the 2003 host but I don't know exactly how to configure the vmware server networking and each vmware to use my new ips and to make sure each external ip is pointing to each vmware.
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Oct 29, 2009
I have a server with CentOS 5.4 with 5 IPs. Now i want to spare 1 IP for the host, and create 4 virtual machines, each with 1 dedicated IP and has direct access to internet (virtual machines created with KVM come with NAT as default)
Anyone can point me to a tutorial or tell me how to setup networking for this ? Working over GUI is not possible since i only have ssh access and don't want to install X just to install things. Is it possible to use Xen networking scripts for KVM guests ? I have tested Xen on my server and its default networking setting worked ie with guests have direct connection to internet.
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Jan 15, 2008
I have two servers with SL- both running Windows with two NICs for Private and Public Interfaces.
What I want to do is keep the first server Internal only, so basically, just disable the Public Network interface in Windows. On this Server, I want to create a VM that can network with the server as well as the second server and any VMs on that second server.
The second server will have both the Public and Private Interfaces enabled. On this server, I will have two VMs and both of these VMs should be able to access both the host PCs, each other, as well as the VM on the first server. Additionally,t These two VMs should also be able to access the Internet.
What would be the best way of going about this configuration.
Right now, I've just started and on the first server, created a VM using a bridged connection to the Private Network. I've give the VM an IP address in the same range as the host PC that is part of the block that SL has reserved for me. However, I cannot ping the host PC from the VM and vice versa. Firewall is disabled on the VM at the moment so I know that is not the issue.
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Apr 1, 2008
I am building a social network site, and I'm very skeptical about the offer the social networking company had for hosting (mainly storage and bandwidth costs). They are hosted through AT&T, and did the whole "tier 1" ******** speech, and wanted to charge $179/mbps/month, $1.17/GB for CDN storage, and $1/GB for normal storage.
I know these prices are high, and to make it worse, they offered no scalability whatsoever on this. This is a big problem, as I expect the site to be popular. I did some research, and know the prices for storage have deep discounts when buying in bulk, but not sure about scalability of bandwidth costs.
I did find several price structures for bandwidth. One of these was for HostPortal, and showed deep discounts as the bandwidth needs increased (colocated prices as low as $50 per mbps once you get above 100mbps total)
Can anyone please shed some insight on the pricing, and let me know if the scalability listed by HostPortal is common and applicable to my situation. Also, if my situation is different, can anyone give me fair market rates with regards to scalability
Also, most social networking companies restrict me from hosting it myself (they state to protect their code).
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Jul 23, 2007
I have windows and linux both are connected through dlink switch, but these are not communicating. How can I setup the network to communicate each other? I have linux box with samba. I am not sure how exactly I need to setup the network.
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Oct 7, 2009
I'm working on a social networking prototype that will hopefully soon become a beta with moderate user load. I have zero experience in the field of web hosts other than rolling out a web application in an internal server at my last job.
The application is being developed in C#/ASP.NET 3.5 with MS SQL Server.
1. Given the fact that I'm trying to save on costs now and worry about scale later, how much would you think that I should spend on hosting? I figured that I'd have my SQL Server instance and the web app on the same box and it wouldn't really matter too much. Would a dedicated server be a minimum requirement? Or perhaps 2, with one hosting the database and the other hosting the application?
2. Does anyone recommend or disapprove of cloud computing?
3. Are there any other factors I must take into consideration? I'm quite ignorant on these matters, and am more focused and knowledgeable on actual development.
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Aug 18, 2009
How do you plan new network cable on your rack?
5e utp
5e ftp
6 utp
6 sstp
6a sftp
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Apr 25, 2007
I am doing on social networking project and I am wondering what specifications of server do we need so I can send it to my programmer to find proper hosting. I have no idea about it, please can you help me.
We are expecting at starting about 4.000 registered users.
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Oct 20, 2007
I installed VMWare Server 1.0.4 on my dedicated server, and set-up a new Windows XP Professional VM.
I have 3 more IP's that are not used.
When installing the VM, I used NAT networking to share my main OS network with my private VPS, but basically no one can access the VM from the outside world. I can surf the net while being on NAT status in the VM, but if I try to run any service like Apache, no one can enter to the service besides the localhost.
My VPS is running Windows XP Professional SP2 with a legal retail license and my main OS on the server is CentOS 4.5 (detailed hardware is mentioned below)
Do you have any idea how can I configure my network so anyone can enter the VPS?
And please, if you can explain me step by step because I'm a real newbie hehe
Kind Regards,
- Nadav Peretz
Also, I saw some topics with solutions but I didn't got a chance to understand something ;
ow and sorry for my English, I know its not perfect : P
(I read the sticky, I dont think this stuff are necessary but I posted them anyway:
Kernel Version: 2.6.9-22.ELsmp
Dual Xeon 3.20GHz with 2GB RAM, 120GB HD 10,000 RPM (Sorry for the un-detailed hardware)
[root@server ~]# vmstat 5 5
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 160 17132 6572 1930168 0 0 121 295 31 146 1 8 90 2
0 0 160 17132 6580 1930160 0 0 0 7 1020 589 0 1 99 0
0 0 160 17132 6580 1930160 0 0 0 0 1016 597 0 1 99 0
0 0 160 17132 6580 1930160 0 0 0 0 1020 601 0 1 99 0
0 0 160 17132 6580 1930160 0 0 0 0 1016 598 0 1 99 0
Using CentOS 4.5
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Mar 26, 2007
How much server space is needed for a new social networking site? Also, how do I calculate server space per user?
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Sep 8, 2007
OKay here is the set up:
I have a CENTOS 64bit running, with 1 guest OS (WinXP) in a VMWare Server. I have tried the following: I have 6 public IP's attached to my 1 Ethernet card in the CENTOS host.
Try 1:
The Guest OS is set to use "Bridged" Networking. This allows full use of the internet, in both directions. Not exactly optimal, but it does work. I can reach the Guest via RD, which is a requirement for this client. The guest OS is mainly assigned one of the 6 public IP's (x.x.x.118). The problem with this setup is the Guest OS can not reach the host. For example the host has a mail server on it, and when the Guest tries to reach the host, it times out.
Try 2:
The Guest OS is set up to use "NAT" and gets 192.168.100.128 as its IP via DHCP inside of VMWare. The nat config file for VMWare is set to open port 3389 (RD port). Guest OS can reach the host with out any problem, and can reach the internet with out any problem, however I can not RD in to the Guest OS.
I prefer setup number 2 for all the obvious reasons, but I just can not get my IPTables rules to work. This is what I thought should work, but does not:
iptables -t nat -I PREROUTING -d x.x.x.118 -j DNAT --to-destination=192.168.100.128
iptables -t nat -I POSTROUTING -s 192.168.100.128 -j SNAT --to-source=x.x.x.118
I realize that would have done all traffic, and defeated the benefits of NAT,but since forwarding only 3389 was not working I tried forwarding everything.
Any suggestions?
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May 8, 2009
I am trying to find an application that can listen on a given UDP port, say "6271" and forward all traffic (UDP) sent to that port to another IP (not on the same subnet).
I should not call this forwarding, but instead, cloning (because forwarding usually is only on the same subnet or vlan). The packets should not be modified, (thus IP information in packet ect.)
Is this possible? I have tried some applications such as,
samplicator
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Nov 5, 2007
I have found this news. What you think? I think that they are trying do things better.
Quote:
November 2, 2007 -- (WEB HOST INDUSTRY REVIEW) -- Domain registrar and Web hosting provider Go Daddy (godaddy.com) announced on Friday it has launched the Go Daddy Connections (godaddyconnections.com) networking site. The new interactive resource provides a virtual community for social and business networking.
Go Daddy Connections enables Go Daddy customers to exchange helpful information, feedback and ideas to better leverage their business assets. The online community, which features topics, articles and forums, connects business owners and all like-minded Go Daddy customers at no cost.
"Small and midsize business owners have questions about running their business online and Go Daddy Connections gives them a place to interact and exchange ideas with other business owners," says Bob Parsons, Go Daddy CEO and founder. "In today's world, if you aren’t online, you aren’t staying competitive – for yourself or your customers."
Go Daddy Connections enables customers to identify important topics, educate themselves and others on business methods or practices and share relevant topical data with one another. Users can also rate and provide feedback on the site, as well as promote their own businesses.
The company announced yesterday it has been seeing tremendous growth in registrations for the .us domain name extension.
Copyright © 2007 Web Host Industry Review, Inc. All rights reserved.
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Aug 26, 2009
if there is any way to forward an external IP to an internal subnet without NAT.
I have a server that is configured with a 10.0.100.101 IP and the L3 switch doesn't support NAT, so I can't get on it right now without manually changing the IP on the NIC to a public IP address.
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Feb 21, 2007
I have a linux router with 2 external and 2 internal ports.
Each port needs to route traffic to one of the internal ports, and the internal traffic between the 2 internal ports should not go out the external ports.
The IPS on the internal networks are global. ie. no NAT required.
I think what I need is this..
$ext_net1 = external nework IP/MASK 1
$EXT_IP1 = ip of external interface 1
$ext_net2 = external nework IP/MASK 2
$EXT_IP2 = ip of external interface 2
$int_net1 = internal network IP/MASK 1
$int_net2 = internal network IP/MASK 2
ip route add $ext_net1 dev eth0 src $EXT_IP1 table 1
ip route add default via $ext1_gw table 1
ip route add $int_net1 dev eth1
ip route add $ext_net2 dev eth2 src $EXT_IP2 table 2
ip route add default via $ext2_gw table 2
ip route add $int_net1 dev eth3
ip rule add from $int_net1 table 1
ip rule add from $int_net2 table 2
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Apr 1, 2007
I have a Webmux load balancer and behind that a Cisco Pix. Behind that I have several servers. The Webmux and Cisco Pix do double NAT so his servers have public IPs.
The problem is that I've added a 4th server, I added it to the Webmux and it's get NATted to an 192.168.x.x IP. Now I just need to add it to the Cisco Pix, natting it back to the real IP BUT the Pix can only have one IP on its inside interface and the Server IP is not on the same subnet as that IP.
So when I try to add the real IP it asks me how to route it....
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Feb 11, 2007
I'm trying to implement VLANs on my network and can't get connectivity to host servers. Here's how the network is configured. Pardon the bad ascii diagram.
In this example my upstream is providing two subnets:
111.111.111.16/28 (I'm using an IP from this subnet to manage the 3550)
222.222.222.16/29
I am attempting subdivide the /29 into two /30's in order to place a server into it's own /30 subnet & VLAN ............
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Mar 24, 2009
I have a server that has multiple IPs, one of which I'm using for a VM that is bridged.
The issue is, internally, that IP is trying to point to itself rather then the bridged nic (which is technically a whole other server plugged into the same switch, logically).
I think I know why, I just don't know how to fix it. This is the config file for the ranges:
Quote:
# Intel Corporation 82546EB Gigabit Ethernet Controller (Copper)
DEVICE=eth1
BOOTPROTO=static
DHCPCLASS=
HWADDR=....
ONBOOT=yes
IPADDR_START=....243
IPADDR_END=....254
CLONENUM_START=0
GATEWAY=....241
NETMASK=255.255.255.240
NO_ALIASROUTING=yes
(edited a few things out just in case)
Basically, there's a start and an end, is there a way to exclude an IP?
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Jul 22, 2009
to expand our existing DNS setup with nodes in North America and Asia.
Therefore, we are searching ISPs that can provide dedicated servers and route an existing (RIPE PI) IP range to that server which will be anycastet for DNS service?
What company would be able to provide that service?
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May 5, 2008
I put together a router running Zebra(yes, I know, should have used Quagga) with a few public ip addresses taking in a full BGP table.
There is a Win2k3 server behind the router running routing and remote access for VPN clients to connect to. Our team's project was to get the win2k3 server VPN clients out onto the public internet with public IP addresses.
I installed another NIC card onto the Win2k3 server and connected it with the router, and assigned the router and the server a private IP address. Both are pingable from both devices.
I then had a VPN client connect in, RRAS assigned the client a public IP address, the router was able to ping the VPN client and so was the Win2k3 server.
I tried pinging the VPN client from another machine on the network with a default gateway pointed toward the router, and there is no response.
Is there something I don't know about with Zebra and Redhat?
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Feb 15, 2007
I have the following problem with a CentOS server:
The main IP of the server is yyy.zzz.www.qqq
We've just purchased 3 additional IPs: aaa.bbb.ccc.100, aaa.bbb.ccc.101, aaa.bbb.ccc.102.
First, all outgoing traffic used aaa.bbb.ccc.100, but after deleting the gateways from the additional IPs it seemed to work fine, until we found out the following:
Now all traffic to aaa.bbb.ccc.XXX uses aaa.bbb.ccc.100 as outgoing IP.
What command would change this to use our main IP?
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Jul 27, 2007
I am setting up a small ccna lab and i have RIP working and i can ping my lan from both routers, but only certain hosts on the lan from the one router the setup is
LAN (192.168.1.0/255.255.255.0)
|
/
router 1 E0 192.168.1.45
Serial0 10.10.10.1
|
/
Serial0 10.10.10.2 (of router2)
|
/
E0 192.168.3.250
E1 192.168.2.250
Lo 192.168.5.4
I can ping 192.168.1.102 from router 2 and 192.168.1.45 but no not 192.168.1.201 ... or 192.168.1.1
also i can ping 192.168.5.4 from 192.168.1.102 which is a linux box and an ip route to tell it that 192.168.5.0 can be gotten from 192.168.1.45
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Jan 16, 2008
Can someone recommend me good (and cheapest) routing or switching gear for the following scenario?
Multiple 1Gbit links, possibility to have a single 10GE link
Sustained 2Gbps of traffic, 4Gbps of peak traffic (streaming media)
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