Fedora Networking :: Unable To Reach Client Pc On Certain Ports
Oct 16, 2010
I have a simple home network with a windows and fedora clients. I'm running fedora 13, but I"m having problems connecting to the pc on certain ports from my windows pc. I can connect from windows to fedora using VNC, and even connect to my postgresql database. However, can not get connected to my Apache Tomcat or JBoss server. When I first installed the OS I went through and configured the firewall but have since disabled it (stopped service). However, I still can't get to the app/web servers.
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Mar 18, 2010
I boot some Slackware with PXE. All work fine except i can't fix the client lockd ports.NFS is compiled inside the kernel, so all modprobe.d options are useless.But rpcinfo -p on the client side shows me totally different ports.On the NFS server, the ports are ok, as i appended lines in /etc/lilo.conf Server and client kernels/modules are identical.
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Feb 3, 2010
This has probably been beaten to death, but I can't find anything that fits my exact situation (maybe I'm using the wrong keywords, sorry).
Server:
eth0 - external NIC, DHCP IP from ISP
eth1 - internal NIC, static 192.168.0.1
DHCP running on eth1
IPTABLES set up to masquerade on eth0
I have a computer connected up via server's eth1. It's IP is 192.168.0.201 (/etc/init.d/networking restart) gives me a DHCPOFFER and everything, so DHCP seems to be working fine.
Server:
can access internet I can ssh into 192.168.0.201 (even though it seems to take longer than usual)
192.168.0.201:
can ping server (well duh, I ssh'ed in from the server) cannot access internet for DNS on the internal NAT I'm using the same DNS servers as the router, so the server's
resolv.conf:
nameserver 69.169.190.211
nameserver 208.72.160.67
[code]....
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Jan 15, 2010
i have sun Virtual box installed on my centos as my host os and centos as guest os.The ip on Sun virtual box virtual interface is10.0.2.15 and the ip on the physical machine is 192.168.1.11.when i try to ping the ip from my vps on centos to my physical machine it pings but it does't work when i try to ping my vps ip from my physical machine.Please recommend the route enteries i need to do in physical machine
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May 18, 2011
Recently I've been unable to load web pages, hosted on my Ubuntu Guest in Apache, from my OSX Host. In fact, I can no longer even ping the Guest OS from the Host. In the past, when I did ifconfig on the Guest, I got an IP of 10.0.1.n. Now I'm getting 10.0.2.15--the default NAT Address. The thing is, I didn't change any settings recently. What I did do is run software update for OSX, Ubuntu, and updated VirtBox.
Current Versions:
VirtBox 4.0.8 r71778
Host: OSX 10.6.7
Guest: Ubuntu 11.04
why I can no longer access my Guest OS from my Host? I spent hours on this last night, to no avail. What would cause the Guest IP to change from 10.0.1.n to 10.0.2.15? As I say, I manually made no config changes.
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Jan 29, 2011
i have installed apache and bind on my server and i've also registered a dynamic domain through dyndns as jan27.dyndns.biz. i am able to successfully host my own webpages using this method.
then i registered a domain name (lets call it "blah.com") through namescheap.com and have registered my nameserver to my ip address. after reconfiguring the my external zones in bind and restarted my services, i am unable to reach my webpages through the new domain name.. www.blah.com and blah.com would lead me to a opendns.com page but interestingly ns1.blah.com loads my webpages successfully.
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Apr 26, 2011
The next problem I faced is that the Jabber-client sends messages but the recipients do not receive them.The server is Openfire 3.7.0. And our users use it without any problems.One user has Kubuntu 10.10. Pidgin 1:2.7.3-1ubuntu3.2. The connection passes well. The contact list loads well. The incoming messages are received well.But the messages which are sent to others - do not reach them.His Jabber-client is configured as others'. I tried Pidgin 1:2.7.3-1ubuntu3.2 (which is used in our company) and Gajim 0.13.4-1ubuntu1 .What can it be? And what should I do?I compared the openssl version on my computer and on problem computer. I have 0.9.8o-1ubuntu4.4. He had just 4. I upgraded his system. Now he has also 4.4. But the problem is still with us.
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Nov 27, 2009
I can successfully connect to a remote Windows Computer using Terminal Server Client but I cannot save the profile (Fedora 12).This means I have to enter the details every time I wish to connect. As I have many different remote locations I need to access on a regular basis is there any way to save the profiles?
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Feb 27, 2011
I use Fed 14. I have China Telecom internet. The wired dsl connection works fine, but the wireless won't work. It has WPA security. The password taken from beneath the router is n2nqrcqx. This password is accepted. Network Manager says I am connected to ChinaNet-TRtk, but in fact, I can't reach the internet via wireless. If I disconnect the cable, I can't get through. I have the settings on automatic dhcp. I have nothing in BSSID, I don't know what that is. I unchecked the box 'require ipv4 addressing for this connection to complete' Ditto that for ipv6.
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Apr 8, 2010
I am not sure if this is a problem with my router or a problem with the fedora 12 server i am using.
- internal here means within my home network, external means from outside it.
I can access my server and webpage:
internally using http://192.168.0.192
externally using http://MYDNS___EXAMPLE.com
but I cannot access the server internally using http://MYDNS___EXAMPLE.com
This is a pain in the butt because I have all of my client software setup with an internal and external access point (ssh, proFTPd, http, MS Access database connected to MySql, etc.)
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Oct 23, 2010
I'm trying hard to run an openvpn server on a openvz VPS, the problem is packets sent from openvpn server process, doesnt reach the client, so connection is never stablished (I run tcpdump on server and wireshark on client to carefully investigate whats wrong), the first guess is that a kind of firewall is blocking traffic (I tried connecting to server through different ISP's but it's possible the national network provider applied some filtering but it cant be on IP,src port or dst port as I'd tried different configuration.
what about deep packet inspection technics, is it possible to block my traffic?) but at exactly the same time I can transmit UDP packets using netcat from server to the guest. there is no firewall enabled in between, I had tried, tcp and udp, tried both open vpn and openvpnAS and tried any thing one can imagine! the VPN is configured as a routed (TUN) type on debian
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Dec 12, 2010
I have recently installed an ltsp system, client and server. Everything works except i cannot get my client side serial ports to work or register for that matter. Can anyone point me to the steps i should take to get these working.
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Jul 22, 2010
I run Lucid on ext3. I really miss not being able to reach Lucid from my dual boot Vista.I have installed the latest fsdriver. I have also tried this:[URL].. which does not work. (Is it because fsdriver is still in the system?) I also tried these methods but to no avail.[URL]. The problem seems to be related to fsdriver not being able to handle ext3 with Inode size = 256. Going back to ext2 for only the home partition seems complicated?
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Sep 24, 2010
i have installed Linux i.e ubuntu 10.04 on my PC in which i have installed pptp client and able to connect it successfully but problem is that it unable to browse internet. in windows it works fine.
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Jul 23, 2009
I have Centos 5 installed on a PC in the local network. I have installed the RPM dhcpv6-client-1.0.10-16.el5.i386.rpm on this PC to configure it as DHCP V6 client. The RPM was installed successfully, and I have done modifications to the following files:
1. /etc/sysconfig/network, set the networking to yes.
2. /etc/sysconfig/network-scripts/ifcfg-eth1 set the BOOTPROTO=DHCP.
Now the problem is when I start the client on this pc as dhclient, it throws the following errors, and logs out after some time. All the network configurations were lost and the PC gets disconnected from the network.
[root@ServerB]# dhclient
Internet Systems Consortium DHCP Client V3.0.5-RedHat
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
[Code]...
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Feb 15, 2010
I just set up an ubuntu 9.10 server (no desktop environment, command line only) and I'm unable to see my samba share. I followed these instructions. Here are the relevant parts of my smb.conf file: Quote:
workgroup = JASONGROUP
# I un-commented this
security = user
[code]....
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Aug 16, 2010
Just installed Ubuntu 10.04 on my Acer laptop last night. I wasn't able to surf the net at first but after searching these forums, managed to get it right (changed setting in firefox). I was able to use update manager and the software program ok (downloading and installing). I am using a adsl via wifi. Networked pcs and my NAS/samba work fine
My current problem is that while I can surf the net and download updates etc, I can't seem to get email and chat working, it just gives a timeout error for some reason.
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May 20, 2009
I have the following problem:I have to networks in remote places.I have an opnvpn client in one network that connects to the the router (openvpn server).My question is,can i connect the network where the openvpn client is,throught the computer with the client to the other network.If yes,how? (please make it an idiot proof anwser because i have limited knowledge about iptables). I was thinking like forwarding (the router in the network with the openvpn client is also firewalling with iptables) the request of the ip class of the openvpn network to the computer with the client,which masquarades the interface
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Apr 21, 2011
I'd like to pass all traffic between bridge ports via the FORWARDING chain, so I changed following sysctl parameters:
Code:
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
[code]...
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Mar 28, 2010
After I applied below iptables rule.. I am unable to ping the host in 172.16.1.0/24 from OpenVPN client
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Aug 2, 2011
I used my computer this morning, but when I returned this evening, I am unable to reach the internet. Also the light on the mobo where the ethernet cable is plugged in is steady yellow.
My limited experience would tell me it is a hardware failure, but it seems so strange with nothing happening during the day. How might I best diagnose the problem?
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Aug 11, 2010
How can I tell if my USB ports are 2.0 ports?
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Jul 12, 2011
I've setup an NFS share on my Fedora 15 host of which Google'ing told me that it had changed radically from the old NFSv3 config. Ie. no more /etc/hosts.allow or /etc/hosts.deny files.....My current setup is this..../etc/sysconfig/nfs:
Code:
#
# Define which protocol versions mountd
[code]...
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May 9, 2010
I am encountering a wierd problem in FC12. When I try to lunch a program that listens to a lower port such as 80 or any one that is less than 1024, I always get "Permission denied" error message (I am running it as root!).Then I try starting httpd service daemon that listens to 80, no errors, the daemon started and listend to 80.PS: I checked selinux, it has been disabled.Do you have any knowledge on this case? BTW, the kernel version is:2.6.31.5-127.fc12.i686.PAE #1 SMP Sat Nov 7 21:25:57 EST 2009 i686 i686 i386 GNU/Linux
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Jan 17, 2011
Looking for a test tool where I can fire up any number of ports (TCP and / or UDP) to listen on.
I am currently getting my using nc but its only 1 port at a time (i know I can open up multiple sessions but thats cumbersome), it can't do UDP, and it closes at the end of the session.
A friend has suggested socat but it looks pretty much the same except it can do UDP, but also cumbersome, I have to manually output to a different file per port, etc.
Basically its so I can quickly test firewall and NAT rules.
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Jan 12, 2010
I'm running ubuntu 9.04 and I have set up 2 ip aliases using the /etc/network/interfaces file http://pastie.org/775037 -- when I ping the main address 10.0.2.16, all works fine, same with the first alias 10.0.2.22 -- but I can't reach the 2nd alias 10.0.2.23 I get the following from ping:
PING 10.0.2.23 (10.0.2.23): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
92 bytes from 10.5.0.1: Destination Host Unreachable
Vr HL TOS Len ID Flg off TTL Pro cks Src Dst
4 5 00 5400 06eb 0 0000 3f 01 5e81 10.5.0.34 10.0.2.23
My machine's IP address is 10.5.0.34 I can't figure out why I can ping 10.0.2.22 but not 10.0.2.23 -- seems like there is probably some kind of routing thing that I'm missing, but I'm confused how it would have gotten set up for 10.0.2.22 but not 10.0.2.23 -- hopefully someone out there has an idea -- or can point me to references where I might be able to learn how to debug routing issues on a network?
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Aug 31, 2010
I have a problem reaching some hosts on the Internet, namely newegg.com and djangoproject.com. On the same machine and network connection using Windows 7 the host names resolve properly and I can connect to them. The host names are resolving in Ubuntu, but I cannot connect to them.
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Mar 12, 2011
I'm using Ubuntu on my laptop but I'm having a small problem. The network is working fine except for the fact that I can't reach anything on my LAN (can't even ping the router), but everything on the outside works just fine. I can even visit my webserver if I type my public IP.
Where should I begin looking for faults?
Here, enjoy some data. I'm using my wlan0 interface, not sure whether eth0 works or not.
Quote:
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 2 0 0 wlan0
[Code].....
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Jul 26, 2011
I have read many, learning linux,apache,samba,vsftp,ssh..etc from this forum but now i am realy stucked and confused. My samba server has always been reached from internal aswell external networks.
I have switched 5 months ago to Telfort network ( i am not sure... ) but as far as i know it was no poblem to connect the samba server with windows explorer everywhere.No i get the only the login screen when connecting from outside the network and when filling in the credentials it just come back with the login screen. I don't have any problems internal when connecting to these shares and supplying the credentials.
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Mar 30, 2010
I am running a server that needs both a wired and wireless connection with static IPs, with wireless as the default link. I'm using the SMCWUSB-G for wireless. I was running Debian for a while and had some routing tables set up as in [URL].... Everything worked until I recently switched to Ubuntu Server 9.10. After the switch a weird behavior showed up: if wlan0 is down, eth0 works fine. But if wlan0 is up, I can't reach any host with either interface (even nameservers or the gateway I am supposedly connected to). ifconfig indicates that nothing is wrong. It's really not clear what is causing this problem. It seems like something has to be wrong with both the wireless hardware/drivers and the routing tables in order for turning wireless on to interfere with "ping -Ieth0".
[code]...
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