CentOS 5 Networking :: Unable To Access Internet?
Jul 4, 2010
On my Centos 5 box my internet won't work. I am unable to get update and I can't download any native programs. But I have Samba running and I am able to access all my files for my other computers.
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Jan 17, 2009
I've installed centos 5 on an old computer with success and it works great.I can access the web server hosted on the centos server from any computer on the wireless and wired local network. I can also use ssh (putty) and nx client from any computer on the local network (wired and wireless) to access the centos server.On the wireless router I've configured a port forwarding to the wireless network interface on the centos server. I can access the centos server from the outside (internet) through this port forwarding both through http and ssh or nx client.MY problem is that I can't access the centos server from the internet through the wired network interface. Any attempt to view a web page or login with ssh or the nx client will timeout.
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Dec 31, 2010
I managed to configure my W890i phone to get access to internet through an ubuntu-based computer. It's very easy to use the phone to give internet access to the computer, but the opposite is quite more tricky. For that I've done the following
----On the phone---
-Set the USB network option to "through computer", so that the phone uses the computer's internet connection and not the opposite.
-Decide and set "Shared Network" parameters: user, pasword and workgroup.
-In "conectivity-> internet connection" set "allow local network" to "yes"
----On Ubuntu 10.04---
-Install samba, samba-client, smbfs, smbclient, firestarter and dhcp3-server
-Configure Samba (System-> Administration-> Shared folders): same workgroup as in the phone, add new user (the phone), passwd this new user. In my case the user was called "w890i" and the password given was the same.
-Once the phone is connected to the computer through USB (then select "phone mode"), a new connection appears in NetworkManager: usb0.The aim is to create a shared network that gives internet access to this device. Edit the IPv4 parameters of this new connection, set them to Manual and give an IP adress (192.168.0.1) and a subnet mask (255.255.255.0); the rest of the fields are left empty.Connect this network.
-Set firestarter to use dhcp3: sudo ln -sf /etc/init.d/dhcp3-server /etc/init.d/dhcpd
-Launch firestarter and follow the wizard. Set "allow internet shared connection", choose the device for the primary internet access, and then the device for the shared network (usb0). Then change the settings for firestarter: activate DHCP for local network, set IP to the one we gave before (192.168.0.1).
-Open dhcp3-server config file sudo gedit /etc/default/dhcp3-server And set INTERFACES="usb0"
-Set the policies of firestarter: in incoming connections, allow connections from the IP adress given to the phone (192.168.0.1). Then add rules for the ports that need to be open for this connection. I opened HTTP, HTTPS, SMB, SMTP, POP3, IMAP, IMAPS, DHCP for all the connections in the local network.
-Apply policies and start the firewall.
------------
After all this, the phone can access the internet through the computer. Two problems appeared:
1. I couldn't get access to https sites, like webmails. The phone gave a "communication error". But then I tried with Opera instead of the browser built in the phone's firmware, and I could finally get to https sites.
2. I couldn't retrieve mail, neither POP nor IMAP nor IMAPS. I thought it was a firmware problem again, and I tried out several mobile phone email clients written in java, but none of them worked.
So this is at the moment the problem. If I connect from the phone to the internet directly through 3G, the email clients work for all my accounts. I don't think it's a firewall problem, because the ports are opened for this connection
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Sep 9, 2009
I have an MSI K9A2 Platinum mobo, which has a 10/100/1000 Fast Ethernet Realtek 8111B built-in, a D-Link DIR-655 Router and a DSL modem. Compared to Windows Visya and other Linux distros ( Fedora 11, Suse 11.1, Mandriva 2009.1 ) access to the internet is much slower. It seems there is a noticeable delay when running CentOS 5.3. before internet access kicks in each time I am surfing the web or updating my system.
Is there any way I can speed things up, or determine why CentOS 5.3 seems much slower ?
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Sep 22, 2010
I am using Ubuntu 10.04. My problem is that I am unable to access my internet using Ubuntu. My internet is running fine on Windows 7 installed on same system. I am a bit unfamiliar with Linux. I tried to configure my network settings but it didn't help. I have my system connected to my dsl router via LAN.
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Oct 17, 2010
I have CentOS5.5, it has full access to internet until I did something to it I couldn't figure out. This is not a cable issue since I could ping and ssh to other machines within my lan. Apache is also running fine, which is probably irrelevant. When I type traceroute cnn, it simply hangs, later saying [URL]:
Temporary failure in name resolution
Cannot handle "host" cmdline arg '[URL]' on position 1 (argc 1)
This is a desktop version of CentOS5.5, when i do Administration - Network, it says eth0 is active and Primary and Secondary DNS are set correctly to my comcast DNS server at 68.94.15x.1
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Jun 16, 2009
Fedora 11 is completely unable to access the internet for some reason, and after some troubleshooting, I've determined the problem to my Motorola 2210 DSL modem. I know my connection is working fine, as it works perfectly in both Vista and 7. I've tried things such as grep 'Ethernet' /var/log/dmesg, filling in the information into the network settings manually, to no avail.
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Jul 25, 2010
I have recently installed ubuntu 9.10. Earlier I had ubuntu 9.04. On that my internet was running perfectly well.After installation I created new connection as I had done for 9.04 version using "Network connections , Edit connections". However, after configuring connection(uname , password etc.) I wasn't able to access Internet.So I tried using "pppoeconf" utility. After using this now whenever I click on network connections applet on top panel , it shows in menu "device not managed".Can somebody point out what went wrong and what to do so as to be able to acess Internet in ubuntu?
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Mar 14, 2009
I just downloaded and installed the latest Cent OS 5. I disabled SE linux, turned off the firewall, and selected the Server package options when installing. I plan on using this as a router/firewall between my internal network and the internet, as well as web server, etc. The first thing I did was to configure the two NICs, internal one with 192.168.7.1 address and the other with an address from my ISP (I have a static address, but I also tried to let the DSL router assign an address via DHCP). Everything looked fine, I checked /etc/resolv.conf and my routes. I was able to ping the DSL router from the server, but I was not able to do a ping or lookup on anything outside my network. I tried host, dig, nslookup, etc, no luck. Obviously then, I was not able to browse the net with firefox.
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Nov 28, 2010
1. I've just installed Centos 5.5 on a dell machine with 2 network interfaces, and have disabled SELinux.
The output for the command sestatus is: SELinux status: disabled
2. Am I right to think that iptables is not a concern since SELinux is disabled? In any case, the output for the command "iptables -L" is:
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT udp -- anywhere anywhere udp dpt:domain
ACCEPT tcp -- anywhere anywhere tcp dpt:domain
[Code]....
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Jun 5, 2011
I am using ubuntu (11.04) here, when i connect Bsnl broadband link(wired connection). Internet is connect automatically But unable to instal, upgrad and access Internet pages ..
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Feb 1, 2009
I'm running a CentOS 5.2 on dom0 and two CentOS 5.2 on domU.The domU use virbr0.I install domU via GUI interface and did not change anything ... the domUcan ping and connect to dom0 but can't access to Internet !!I search google and find someone mentioned that I need to enable IP forwardin dom0 ... I did but my domU still can't access to Internet.What else I need to do ?The routing table of dom0 is:
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
[code]....
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Apr 26, 2011
can't access internet. The up and down icon appears by the network connection (upper right hand corner). When I review connection properties, I see that the computer has a valid address, subnet, gatway, dns, etc... But it still can't connect to the internet. I can't ping external addresses either. But I can access internal addresses (local router).
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Jul 27, 2010
I have a Centos5.4 64bit laptop, having an eth0 and a wlan0. I connect this wired eth0 to a wall socket to access Internet via DHCP (eg the assigned address is like 192.168.192.xx). I do not have access to the ADSL router. How can I turn this laptop into a Wifi access point to allow, say my Ipad or any wireless-only client, to access the Internet thru this laptop ?
That is, communication between iPad to laptop is wifi(ad-hoc connection ??), laptop to the ADSL router is wired LAN. The laptop need to have some bridging build in ? If you can refer me some concepts, then I can follow up from there.
Or better yet, has anybody does this before ?
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Mar 8, 2011
I am trying to access my company VPN using my Centos 5.5 laptop. I have the vpn client certificate issued by my company's IT dept. I am able to access the webmail using the same certificate which I installed in firefox. But I would like to know how to use this certificate to sign in to the VPN. Some of my colleagues use the Cisco VPN client v5.0.? software and the vpn client certificate to login. It works fine. But I would like to do the same with Centos.I tried connecting using vpnc. I converted the pcf file to conf using pcf2conf. Converted the certificate to .pem file. I replaced the /etc/vpnc/default.conf file with the pcf2conf converted file. Following is the converted conf file:
IPSec gateway example-vpn.companyname.com
IPSec ID <groupid>
IPSec secret <groupsecret>
[code]....
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May 5, 2010
we are trying to install this NIC Rosewill RC-400 Chipset RTL8169S-32 in Ubuntu 9.04 we downloaded the drivers from Rosewill website (For kernel 2.4.x and 2.6.x V 3.1) but when we follow the instruction in the readme file and do make clean modules and error comes out
Code:
make -C src/ clean
make[1]: Entering directory `/home/trinity/Desktop/r8169-6.006.00/src'
rm -rf *.o *.ko *~ core* .dep* .*.d .*.cmd *.mod.c *.a *.s .*.flags .tmp_versions Module.symvers Modules.symvers rset[code]...
So I went do realteak downloaded latest available drivers that seems to be were release yesterday did same command and same error So I made only make and it went fine did then make clean modules and went fine so made make install, depmod -a and modprobe r8169 verify int was up and getting correct ip from router but I'm not able to access the internet or ping any IP address
Code:
xxx@xxx-desktop:~$ uname -a
Linux xxx-desktop 2.6.28-18-generic #60-Ubuntu SMP Fri Mar 12 04:40:52 UTC 2010 i686 GNU/Linux
xxx@xxx-desktop:~$
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Oct 27, 2010
From my office and home, I can access a web service, no problem. However, from my server at the data center, I cannot. Could this be a DNS issue? I've tried with iptables enabled and disabled. selinux is disabled. This server has multiple network interfaces, one public and two private. The public has a WAN IP address (1.1.1.1), the private is 10.1.10.2 and the other private is connected via crossover cable to another server 192.168.100.1. I think route -n tells me the WAN interface is used to access the internet, as its gateway is my ISP's upstream gateway. CentOS 5.5.
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Jul 4, 2010
Unable to get update or download any native programs. But able to access file from Samba
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Dec 9, 2009
I am trying to install CentOS-DS on version 5.4 x86_64. I cannot get to the Extras repo due to lack of wired Internet access. I have wireless (except to server) and I have big UFD drives.
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Nov 21, 2010
I just installed Ubuntu 10.10 today on my laptop (I installed it alongside Windows 7).
My problem is that I'm unable to access the internet; actually, I'm unable to access any wireless connection at all.
I'm using a Linksys Wireless-G Notebook Adapter (2.4 GHz) in my laptop.
From what I've read, normally, many wireless cards are detected by Ubuntu automatically when you install it. However, this did not happen with my card.
...So, I'm not really sure what to do in order to gain access to the internet.
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Jul 6, 2011
I connected my laptop running with Ubuntu 11 in the LAN but I couldn't access internet.But I could ping to the other computers connected in the LAN. I tried the same thing with windows 7 in the same laptop and I could access internet.
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Sep 28, 2010
after installing some updates while on linux I am now unable to access the Internet when using vista. I m trying to solve this without success. Internet is still accessible from linux, and vista canl connect to the local network.
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Aug 3, 2010
When powering up with Linux, I get the message "THERE WAS AN ERROR CREATING THE CHILD PROCESS FOR THIS TERMINAL".I posted this on Newbies several months ago but received no replies. I hope this is the correct forum.I am using Windows XP Pro at the present.
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Oct 15, 2009
is it possible to use yum in any way when a computer is not connected to the internet(but when full install media is available; for example the dvd)? Or should I resolve all dependencies manually using rpm?
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May 20, 2011
I am using a CentOS 5.4 server for Snort (it's actually using the easyIDS config). I'm trying to modify some things, and I've noticed that I can't seem to download any files. WGET, FTP, etc... all just time out. It's not a network firewall issue, as I've been monitoring the logs and see no blocked traffic, and other machines on the subnet can get outside with no problems. I checked the Cent firewall using the setup command, and it says it is disabled as well. I'm very new to linux, so I'm wondering how I can troubleshoot this? The wget and ftp errors just say the connection timed out, but I'm not sure why.
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Jun 12, 2009
I've been running a Samba server under RedHat 8 for five years without a hiccup. I want to cut over to a F10 box but cannot get shares accessible. smbclient attempts fail over NT password error. SELinux is disabled. Server is visible on the network. Users require no password access to shared data.
smb.conf follows:
# Samba config file created using SWAT
# from UNKNOWN (>)
# Date: 2009/06/12 14:15:15
[code]....
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Nov 6, 2010
Installing from Live USB: Installing from USB on my desktop (used this method for laptop install) goes without a hitch. EXCEPT, I notice there is no support for my wireless card chipset (Atheros 7413, used /bin/lspci to find). I download the drivers for Linux, but I need Make to build the drivers...ok. I download the Make files from my laptop, make coffee, slap the makefiles onto a flash drive and run the configure file on my desktop version of SUSE. Whoops, need a c compiler (odd that openSUSE did not come with gcc? bit confused on that). If you can't tell by now, I've been using linux for less than a month so I am what you would call a noob? After the lack of c compiler, I drove to my office to snag some DVDs to download the DVD iso image, hoping it would have some form of c compiler/make packaged, since the description does say the DVD has more software (can't find any prebuilt versions of either...?)
Installing from DVD: This was my next step. I wrote the iso image to a DVD and proceeded to boot from DVD. The installer fails at the system analysis, saying it cannot "create a repository". writing the iso to a second DVD produces the same result. Googling has not yielded a solution. tl;dr can't use openSUSE on my desktop because my wireless chipset is not suported by SUSE. I need Make to build the drivers, but I need a c compiler to compile Make, and I need the internet to get both for my machine.
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Mar 12, 2010
To start off I do not have the ability to post in the Networking/Wireless thread. I attend DeVry university and in my school they recently rolled out "Bluesocket." Now that they have done this I am not able to access the internet utilizing my ubuntu laptop.I am able to connect to the network. When I open my web browser I am redirected to the "bluesocket" login page where I am able to successfully log in. The next step to accessing DeVry's internet service is to allow Bluesocket to do a scan using a Java applet. That scan is successful.
The results of the scan inform me that I am not being allowed to access the network resources because I don't have an antivirus or firewall program installed on my computer. I do not wish to have an antivirus or firewall program installed on my laptop to utilize DeVry's network resources. My question is what steps do I need to take to bypass/trick bluesocket?
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Apr 3, 2011
i am unable to access internet in linux editions (redhat 5.4 & centos 5.5) recently i have taken a reliance internet connection but the think is i didn't get any ipaddress from reliance, but i accessing internet in window 7 and i have triple boot. pls any one give the solution.
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Apr 21, 2009
We have Apache installed on CentOS 5.3 in our laboratory. Indeed the server is running fine for almost two years since it is actually the first CentOS 5 that was released just regularly updated. Now, most of our applications are custom made PHP applications and until now we somehow managed to avoid using PHP to fetch files that are on the internet itself. But now we are desperate because we need to allow PHP to fetch files through Apache but it seems as if Apache is not allowed to make a connection to the outer world. Additionally we use a proxy server to connect to the outer world so right at the beginning http_proxy is used to set that environmental variable. And for the root user it all works fine after that but it seems as if the apache user is not allowed to access the internet. Just to make a remark our web server can be accessed from the outer world so its a one way street for now.
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