Search Results

Search found 11687 results on 468 pages for 'ex networking guy'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 62/468 | < Previous Page | 58 59 60 61 62 63 64 65 66 67 68 69  | Next Page >

  • How to Configure Source NAT (Private IP => Public IP Outbound)

    - by DavidScherer
    I'm running VMWare ESXi Free and have Zentyal SBS 3.2 running as a Gateway. I have 5 Public IPS (CIDR/29, let's call them 69.1.1.1 - 69.1.1.5) and currently Zentyal is bound to 69.1.1.1 as the Gateway, with the other 4 Public IPs set as Virtual Interfaces in Zentyal (wan2-wan5) I have machines sitting on the Private Network (10.34.251.x) that, when going Outbound (to Google for instance) should be seen by the Internet as an IP other than the Gateway (69.1.1.1), this is because our machines need to be able to communicate with 3rd party APIs that expect these requests to come from a specific IP. From what I could find, SNAT (Source NAT) in Zentyal is used to achieve this, but I'm not sure how to configure it and cannot find a specific piece of Documentation for it at Zentyal. I've tried setting this up a couple different ways, with no results and at this point I have no idea if I'm going about this completely wrong, or my lack of experience with networking and the associated terminology is preventing me from placing the correct values in the correct fields. I get the following form to set up "SNAT" rules in Zentyal: Perhaps someone can offer some guidance and definitions for the fields above? SNAT Address Is this the Public IP I want to masquerade? Outgoing Interface Should this by my External NIC (one connected to Public 'Net), or is it the "Private" interface? It sounds as though this should be the External interface as I want the traffic from the internal network sent Out over this Interface (using a different IP than normal, anyway) Source Is the the Source on the internal network (one of the private IPs?), a public IP I want to masquerade as, or something else entirely? Destination Is this a place on the Internet (eg, "Only do this for the Site Google.com"/IP) or am I allowing myself to become confused again? Service I'm assuming this allows me to restrict which services this rule will apply to, but is it for a service on the internal network or a service being accessed on the external network? If I can offer any further details or information to make what I'm trying to do more clear, I will happily do so. Honestly any kind of help here would be very appreciated. I'm not a NetOps or anything even close, I spend most of my day writing code and my entire "team" at this company consists of "me, myself, and I" so while I try to broaden my KB at every possible opportunity, I can only learn so much, so fast and I feel like with networking especially there's just so much, coupled with a learning curve for each solution that likes to (from my limited perspective) use slightly different terminology that what I'm used to (and I don't exactly have the necessary experience to cross reference this stuff with the stuff I already know in context).

    Read the article

  • Mobile Internet Problem

    - by alskndalsnd
    I am using mobile dial up on ubuntu. However, SOMETIMES even though I am connected to the ISP, I do not have any entries in /etc/resolv.conf. I often restart network-manager or networking hoping it will change but normally it doesn't do any good. and by connected I mean I can see that the network notification icon has switched to a few bars indicating connectivity). Anyone know a good solution around this?

    Read the article

  • How to make Linux to re-detect network interfaces?

    - by ablmf
    For some reason, ifcfg-eth* under /etc/sysconfig/network-script were deleted. Is there any tools that could detect network interfaces and re-generate these files? Another question : If I manually added ifcfg-eth0, is there any method to make it work without reboot? I tried "/etc/init.d/networking restart", and it doesn't work.

    Read the article

  • Cisco NAT vs Bridge vs BVI

    - by cjavapro
    The only devices on this particular LAN will all have public IP addresses. Also the public IP address will be configured directly on the machine,,, so we will not translate private/public IP addresses. If we use NAT,, we would have to translate the public IP on the WAN to the public IP on the LAN. The only security feature I expect on the gateway is an access list. I don't really know much about networking, so I am sorry if this question is generic.

    Read the article

  • Obtaining a DHCP IP address if static address is not available

    - by user142485
    I have seen some questions that are similar to my problem but not a good solution. Ex. User has a laptop and has a static IP address at the office. They also take the laptop off site where they also need internet. Is there a way to configure their computer so that it will obtain an IP address automatically when the configured static address is not available (without making the user go into network configuration and changing to obtain automatically)?

    Read the article

  • Network Services disabled (not starting) on Windows XP

    - by Rickesh John
    I am currently running Windows XP Service Pack 3 on my system. But today, when I failed to connect to the internet, via a LAN cable, I realized that almost all of the vital network services had stopped functioning. Any attempts to start it through services.msc gives me the following message: Could not start the DNS Client Service on Local Computer Error 1068: The dependency service group failed to start All my software or services that are related to networking have stopped functioning, for example, Windows Firewall is turned off permanently, so is my Avast Anti-Virus' service of Real Time Shields and Web Shield. When I insert the LAN wire into my laptop, it registers itself, but this is what I get when I do a ping localhost C:>ping localhost Unable to contact IP driver, error code 2 Moveover, with ipconfig I get this : Windows IP Configuration An internal error occurred: The request is not supported. Please contact Microsoft Product Support Services for further help. Additional Information: Unable to query host name On some further poking around, I saw that none of the "NETWORK SERVICE" process in task manager, except svchost.exe were running. Also, when I first opened the task manager, I saw some 20 processes running with username column empty for most of them. With some search in Google, I found out that these services were important, DHCP DNS Net logon Network connection Network location Awareness TCP/IP Net BIOS Helper none of them, except Network Connections are working, they do not start. The event viewer of my system shows a bunch of 7000 and 7001 event errors. I have tried re installing the network driver, booting in safe mode with networking and tried to enable those services mentioned above. I had disabled System Restore some time back, so I have no restore points for my system. I tried a lot of things from Google searches but none of them worked. Also, with such a long list of issue, I am a little confused as to what should I search on the internet. :( One more thing I would like to mention, previous morning, my anti-virus Avast detected a RootKit buried deep in my system folders. It was removed, but maybe this was a problem caused by the root kit. I did run a boot-time scan but no viruses were found. Please please please advice. Is formatting and re-installation of Windows my only option?

    Read the article

  • how do I make two internal networks speak with one another

    - by Nick M.
    I have two internal networks that are connected to each other 10.10.10.1 and 10.10.11.1 I am trying to make devices on the 10.10.10.1 network be able to access the devices on the 10.10.11.1 network and vice versa. My questions is what is the networking term used to "bridge/route" traffic between the two networks making each other available to one another. Also what is the process in getting this going using iptables?

    Read the article

  • How to configure LAN controller to run at 1Gbps connectivity?

    - by Metro Smurf
    I have a few computers connected through a Gigabit router which show 1Gbps connections. However, one of the computers only shows 100Mbps connectivity even though it is capable of 1Gbps. I am not seeing an errors in the event viewer. Computer Specs Windows XP SP3 x86 A8N-SLI Premium MoBo Marvell Yukon 88E8001/8003/8010 PCI Gigabit Ethernet Controller Driver: Marvell v11.24.3.3 (2/15/2010) Networking Specs Netgear RangeMax Premium Wireless-N Gigabit Router (WNR3500) CAT6 wiring Question: How can I configure the above computer to run at 1Gbps connectivity like the others?

    Read the article

  • QNAP (469L) with Debian: can't connect to router

    - by agtoever
    I've been running my QNAP 469L with Debian (Wheezy deb7u3) for a few months. Yesterday I upgraded the memory to 4 GB. The system boots fine, but since the upgrade, I'm not able to connect the server to my router (a TP-Link WR941ND). My configuration: The router runs a DHCP server (192.168.67.100 and up), with a preconfigured ip address for the QNAP (192.168.67.10). The router is on 192.168.67.1. As said, Debian is installed on the QNAP (which can be regarded as a normal computer). Networking hardware on the QNAP: Intel PRO/1000 Network Connection using the e1000e kernel module. This is what I have tried so far: Replace the network cable (tried 3 different cables on different router ports). Check for messages from the kernel: dmesg | grep eth. Besides the normal hardware messages I get a ADDRCONF(NETDEV_UP): eth0: link is not ready for each call to ifup. Manually restart the network sudo server networking restart Check sudo ifconfig (eth0 is up, but no ip addresses). Check the /etc/network/interfaces which has (besides the loopback device) an allow-hotplug eth0 and iface eth0 inet dhcp, which is afaik the default Debian configuration. Since the server has two ethernet ports, I checked if I'm using the right port (checked the hardware address that ifconfig reports for eth0 is the same as the hardware address that is in the preconfigured ip address for the server in the router. Do a manual sudo ifdown eth0 && sudo ifup eth0 with no results (but an extra ADDRCONF(NETDEV_UP): eth0: link is not ready in the kernel log) Do a dhcp request dhclient -v eth0: for about a minute requests are send (according to the terminal) and at the end I get a No DHCPOFFERS received. No working leases in persistent database - sleeping.. Check the router system log if DHCP requests are received. I see them for some devices (my Mac, my iPhone) but not from the QNAP. The log entry looks like: DHCPS:Recv REQUEST from 84:85:06:07:75:6A and then a DHCPS:Send ACK to 192.168.67.101. There are no records from the QNAP's hardware address. So the two error messages that I do get are: ADDRCONF(NETDEV_UP): eth0: link is not ready for every ifup and No DHCPOFFERS received. No working leases in persistent database - sleeping. for every DHCP call.

    Read the article

  • How it was detected if last ACK lost in TCP connection termination procedure?

    - by sonali
    In TCP Connection Termination, when client enters in TIME_WAIT state means the client waits for a period of time equal to double the maximum segment life (MSL) time, to ensure the ACK it sent was received. (I read above from a book computer networking by kurose and also given in following URL http://www.tcpipguide.com/free/t_TCPConnectionTermination-2.htm ) But how it was detected if last ACK(send by client as a response to server FIN) lost?

    Read the article

  • Python cannot go over internet network

    - by user1642826
    I am currently trying to work with python networking and I have reached a bit of a road block. I am not able to network with any computer but localhost, which is kind-of useless with what networking is concerned. I have tried on my local network, from one computer to another, and I have tried over the internet, both fail. The only time I can make it work is if (when running on the server's computer) it's ip is set as 'localhost' or '192.168.2.129' (computers ip). I have spent hours going over opening ports with my isp and have gotten nowhere, so I decided to try this forum. I have my windows firewall down and I have included some pictures of important screen shots. I have no idea what the problem is and this has spanned almost a year of calls to my isp. The computer, modem, and router have all been replaced in that time. Screen shots: import socket import threading import socketserver class ThreadedTCPRequestHandler(socketserver.BaseRequestHandler): def handle(self): data = self.request.recv(1024) cur_thread = threading.current_thread() response = "{}: {}".format(cur_thread.name, data) self.request.sendall(b'worked') class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer): pass def client(ip, port, message): sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((ip, port)) try: sock.sendall(message) response = sock.recv(1024) print("Received: {}".format(response)) finally: sock.close() if __name__ == "__main__": # Port 0 means to select an arbitrary unused port HOST, PORT = "192.168.2.129", 9000 server = ThreadedTCPServer((HOST, PORT), ThreadedTCPRequestHandler) ip, port = server.server_address # Start a thread with the server -- that thread will then start one # more thread for each request server_thread = threading.Thread(target=server.serve_forever) # Exit the server thread when the main thread terminates server_thread.daemon = True server_thread.start() print("Server loop running in thread:", server_thread.name) ip = '12.34.56.789' print(ip, port) client(ip, port, b'Hello World 1') client(ip, port, b'Hello World 2') client(ip, port, b'Hello World 3') server.shutdown() I do not know where the error is occurring. I get this error: Traceback (most recent call last): File "C:\Users\Dr.Frev\Desktop\serverTest.py", line 43, in <module> client(ip, port, b'Hello World 1') File "C:\Users\Dr.Frev\Desktop\serverTest.py", line 18, in client sock.connect((ip, port)) socket.error: [Errno 10061] No connection could be made because the target machine actively refused it Any help will be greatly appreciated. *if this isn't a proper forum for this, could someone direct me to a more appropriate one.

    Read the article

  • How do i network ten branch office with voip, video calling and files sharing.

    - by Oluwalogbon
    Am an IT person, have done some networking job for my organization like Lan and wireless within the area, configure windows server to manage staff account My company has ten branch (In each state) in my country and am giving a task to connect dose branch together, which there will be VOIP, Video calling and sharing of files within the branch. I need someone to help me with this project..what and what did I need to put in place

    Read the article

  • Social Networking & Network Affiliations

    - by Code Sherpa
    Hi. I am in the process of planning a database for a social networking project and stumbled upon this url which is a (crude) reverse engineered guess at facebook's schema: http://www.flickr.com/photos/ikhnaton2/533233247/ What is of interest to me is the notion of "Affiliations" and I am trying to fully understand how they work, technically speaking. Where I am somewhat confused is the NetworkID column in the FacebookGroups", "FacebookEvent", and "Affiliations" tables (NID in Affiliations). How are these network affiliations interconnected? In my own project, I have a simple profile table: CREATE TABLE [dbo].[Profiles]( [profileid] [int] IDENTITY(1,1) NOT NULL, [userid] [uniqueidentifier] NOT NULL, [username] [varchar](255) COLLATE Latin1_General_CI_AI NOT NULL, [applicationname] [varchar](255) COLLATE Latin1_General_CI_AI NOT NULL, [isanonymous] [bit] NULL, [lastactivity] [datetime] NULL, [lastupdated] [datetime] NULL, CONSTRAINT [PK__Profiles__1DB06A4F] PRIMARY KEY CLUSTERED ( [profileid] ASC )WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY], CONSTRAINT [PKProfiles] UNIQUE NONCLUSTERED ( [username] ASC, [applicationname] ASC )WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY] ) ON [PRIMARY] One profile can have many affiliations. And one affiliation can have many profiles. And I would like to design it in such a way that relationships between affiliations tells me something about the associated profiles. In fact, based on the affiliations that users select, I would like to know how to infer as many things as possible about that person. My question is, how should I be designing my network affiliation tables and how do they operate per my above requirements? A rough SQL schema would be appreciated in your response. Thanks in advance...

    Read the article

  • how to learn winsock or raw sockets? (c++)

    - by blood
    i have been googleing trying to find a Winsock book or something about networking but all i can find is out of date books or nothing at all :( so does anyone know a book i can buy to learn about networking in VC++ 2008? i really would like a book i could hold because i learn better when it's in my hand.

    Read the article

  • As a code monkey, how to discuss programming with a guy who almost has a doctorate in computer science

    - by Peter Turner
    A friend of my wife's is coming over for dinner tonight and he is a lot smarter than me. What do we have in common, well... A Bachelor's in Computer Science, and that should be enough of a conversation starter. But he's nearly completed his doctoral studies and is light years ahead of me in his particular area, which I find fascinating but don't have any legit reason to care about (except for maybe a better way through heavy traffic - he's a combinatorics guy specializing in that I think) and I got married and had some kids and am a professional programmer for medical records software. We've got a lot in common, but there's a point where neither of us care or understand each other - although I really want to learn from him and I'm not certain he'd even want to talk about his work. So for all you doctors or code monkeys, what's a good conversation starter!

    Read the article

  • How do I become a programmer and not some guy that can type some C?

    - by Phoxxent
    From what I understand, programming has a lot more to it than learning syntax, that it involves an understanding of what happens under-the-hood and even more. Currently, I am just a guy that can pump out a few loops in Python or C and maybe make a small-scope Zork clone as the hight of skill. So, what can I do to become an actual programmer? How can I find out what I need to know and learn it? I know this has been vaguely asked before, but I kind of want an answer of how as opposed to the whats that I have seen. Would it be nice to know how real programmers define being a programmer? yes. Is that going to actually help me (or anyone else) learn what they need to learn? no. (well, maybe.)

    Read the article

  • eth0 and eth1 both assigned same IP on boot

    - by Banjer
    I have a physical SLES 11 SP2 server on a Sun Fire x4140 that is giving me problems with networking upon reboot. The NICs are onboard. The networking appears successful during boot, but network services such as nfs fail hard. This is because eth0 and eth1 are both receiving the same configuration and are both ifup-ed. Once everything times out and I'm at the console, ifconfig shows that eth0 and eth1 are UP and running with the same IP. Attempting to ping anything in that subnet fails. Restarting the network service fixes the issue. eth0 is the correct NIC that should be configured as primary, per the MAC address. Question: Whats causing eth1 to be brought up with the same config as eth0?? I do not have a config script set up for eth1: banjer@harp:~> ls -la /etc/sysconfig/network/ total 104 drwxr-xr-x 6 root root 4096 Jun 11 12:21 . drwxr-xr-x 6 root root 4096 Apr 10 09:46 .. -rw-r--r-- 1 root root 13916 Apr 10 09:32 config -rw-r--r-- 1 root root 9952 Apr 10 09:36 dhcp -rw------- 1 root root 180 Jun 11 12:21 ifcfg-eth0 -rw------- 1 root root 180 Jun 11 12:21 ifcfg-eth3 -rw------- 1 root root 172 Feb 1 08:32 ifcfg-lo -rw-r--r-- 1 root root 29333 Feb 1 08:32 ifcfg.template drwxr-xr-x 2 root root 4096 Apr 10 09:32 if-down.d -rw-r--r-- 1 root root 239 Feb 1 08:32 ifroute-lo drwxr-xr-x 2 root root 4096 Apr 10 09:33 if-up.d drwx------ 2 root root 4096 May 5 2010 providers -rw-r--r-- 1 root root 25 Nov 16 2010 routes drwxr-xr-x 2 root root 4096 Apr 10 09:36 scripts On a side note, eth3 is also configured with an IP in a different subnet, but this has not posed any problems. FYI the kernel module being used is forcedeth. banjer@harp:~> sudo cat /etc/sysconfig/network/ifcfg-eth0 BOOTPROTO='static' BROADCAST='' ETHTOOL_OPTIONS='' IPADDR='172.21.64.25/20' MTU='' NAME='MCP55 Ethernet' NETWORK='' REMOTE_IPADDR='' STARTMODE='auto' USERCONTROL='no' ONBOOT="yes" Here's eth3 in case you need to see it: banjer@harp:~> sudo cat /etc/sysconfig/network/ifcfg-eth3 BOOTPROTO='static' BROADCAST='' ETHTOOL_OPTIONS='' IPADDR='172.11.200.4/24' MTU='' NAME='MCP55 Ethernet' NETWORK='' REMOTE_IPADDR='' STARTMODE='auto' USERCONTROL='no' ONBOOT="yes" Perhaps is something related to udev? 70-persistent-net-rules looks OK to me, but I may not understand it completely. banjer@harp:~> cat /etc/udev/rules.d/70-persistent-net.rules # This file was automatically generated by the /lib/udev/write_net_rules # program, run by the persistent-net-generator.rules rules file. # # You can modify it, as long as you keep each rule on a single # line, and change only the value of the NAME= key. # PCI device 0x10de:0x0373 (forcedeth) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:18:4f:8d:85:4c", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2" # PCI device 0x10de:0x0373 (forcedeth) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:18:4f:8d:85:4a", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # PCI device 0x10de:0x0373 (forcedeth) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:18:4f:8d:85:4b", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1" # PCI device 0x10de:0x0373 (forcedeth) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:18:4f:8d:85:4d", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3" # PCI device 0x1077:0x3032 (qla3xxx) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:c1:dd:0e:34:6c", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth4" Any other thoughts on what would cause this?

    Read the article

  • how do web hosting companies host end users domain and give so many public IPs

    - by Registered User
    Hi, I am a Computer Science guy who understands networking very well. But when it comes to Web hosting companies I am clue less. I want to know how do web hosting companies give so many public IPs to so many users and each of them has root login also. How this is technically done that is what I am interested to know. I do not know how you people configure it. In my case if I have to do I will buy a public IP from some one and connect my server to it and at max give some people SSH access to it.In case of Web hosting companies how is it done.

    Read the article

  • Use dns suffixes only on certain wireless networks?

    - by eidylon
    Hello all, quick question. I'm a software guy and networking is all black magic to me! I have a laptop which I use at home and at the office. In order to be able to more easily reference our servers at work, I have our domain name in the DNS suffixes on my TCP/IP settings on my wireless connection. This all works beautifully and I can reference our servers simply by name only. Now the problem... When I go home, it still has those suffixes in there, and I cannot access other servers because it appends the DNS suffixes to the server names. Is there a way I can set up DNS suffixes so that they are only applied when connected to a certain wireless network (I'm thinking by SSID).

    Read the article

  • Why can't my networks reach each other?

    - by HOLOGRAPHICpizza
    We have two Buffalo WZR-HP-G300NH2 routers, with the default firmware, DD-WRT v24SP2-MULTI (10/31/11) std - build 17798. Each has a separate cable internet connection with a public static IP address. They are both in the 24.123.68.0/24 space. Both of them can contact pretty much the whole internet, and they can both be accessed out on the internet with no problem, but for some reason they can't talk to each other! When I try to ping one from the other I always get "Destination Host Unreachable". There are no strange routing or firewall rules in place. And they are both set to respond to pings, I can ping them from outside. Our main IT guy is going to call our ISP on Monday, but I'm impatient, so does anyone have any ideas?

    Read the article

  • Can a network interface be configured to have a default gateway for UDP packets?

    - by Vaibhav
    It is quite possible that my question may not make a lot of sense. I apologize, but I am not a networking guy, and that's my excuse. To elaborate, WikiPedia defines "Default Gateway" as a node on a "TCP/IP" network. And the way it works is that if a network interface is sending a packet to an IP address not present on its subnet, it sends it out to the default gateway (which then knows what to do with that packet). Is this true if a UDP packet (datagram) is involved? I mean, if my network interface is sending a UDP packet to an IP address that is not present on its subnet, would it automatically send it to the Default Gateway as well?

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 58 59 60 61 62 63 64 65 66 67 68 69  | Next Page >