Networking :: Can't Ping Outside On Specific IP Address
Oct 14, 2010
Something strange with my firewall i used firestarter I dont know why i cannot ping outside on a specific IP address here is my setup. I have IP from ISP
119.92.56.77 - eth0
192.168.50.1 - eth1
with DHCP features from 192.168.50.1 - 254. my problem is i cannot ping this specific IP address which is 119.93.232.234 if you can try there and pinging is ok but here cannot because that IP address (119.93.232.234) they used that to connect to our openvpn which is the IP is 119.92.56.78 <---- this system linux(centos) or IP has no firewall enabled. meaning i separeted this connection. which my setup is like this for OPenVPN
[code]...
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Jul 15, 2011
I am using an virtual machine. where I need to ping from one machine to another. earlier I was able to ping. But after going to google.com once, I cannot ping back to this machine.
But if I gave ping -I eth1 <IP> then I can ping.
I cannot install any package, so tell me solution which includes not installing any package.
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Mar 28, 2011
im trying to ping from a specific interface, I have a wired and a wireless connection both going into my laptop.
My wired adaptor eth0 is on the ip 172.16.109.75 my wifi adaptor wlan0 is on the ip 192.168.1.69
when I ping google with my eth0 unplugged with the following command
Code:
conneco@mcr-pc-29334:~$ ping -I wlan0 www.google.co.uk
PING www.l.google.com (74.125.230.115) from 192.168.1.69 wlan0: 56(84) bytes of data.
64 bytes from 74.125.230.115: icmp_seq=1 ttl=51 time=32.7 ms
[Code].....
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May 29, 2010
I am not able to move original thread so I am linking to it: [URL]
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May 13, 2011
Even ping google's ip address doesn't work. unknown host error using backtrack4 able to browse net with these settings.
My network settings:
What's the problem with these settings...
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Mar 14, 2010
my network expertise is tenuous at best. This started because one computer on my network is having trouble updating Google Toolbar information. This is a laptop which joins other wifi networks outside of the house.
Code:
BROKEN:~$ ping toolbar.google.com
PING toolbar.google.com (208.68.139.89) 56(84) bytes of data.
[code]....
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Jul 29, 2011
I have installed openvpn on an ubuntu 10.04 server. I run 11.04 on my desktop. It can connect to my VPN server. The problem is, I have ZERO internet access. I cannot even ping an IP address.
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Apr 7, 2010
I have a server with centos 5 and plesk 9 and I have buy an additional IP address for my server, when i create it in plesk, there is no problem, all its ok I can assign it to a new domain, but the ip only responds ping, none of other services as http, ssh or smtp.I paste here the configuration of files
ifcfg-eth0
device=eth0
bootproto=dhcp
[code]....
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Jun 15, 2010
Since two days i m not able to browse websites using the domain names but able to ping/browse using IP addressed. I have done the following:
1. Using wireless i m able to get IP address of DNS (8.8.8., Gateway, localhost & router ip address
2. Disabled wireless and connected ETH0 but still the same problem
3. not able to edit resolv.conf
sudo gedit resolv.conf
** (gedit:4179): WARNING **: Hit unhandled case 0 (Error opening file: Input/output error) in parse_error.
[code].....
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Jun 25, 2009
I run an centos server. From the console I can ping google.com and get a reply. But when I ping another address say xyz.com, the IP address is resolved (11.22.33.44) but there is no reply. In the same network in our office from my desktop I ping [URL] and there is a reply.I turned of the firewall but still the same problem.
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Jan 12, 2010
i have problem with my configuration iptables, i have configured for transparent like this,
for masquerade -> iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
for transparent -> iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 3128
how to make a rule if there 1 address i dont want to redirect to port 3128? in other words 1 specific address just run on port 80.
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Jan 6, 2010
I have my firewall setup so that only specific subnets/IP addresses can access the system. My issue is that I have remote user/laptop who needs to access the system, but is constantly on a different subnet/dhcp IP address. Is there configuration for iptables where I can enter the mac address of the laptop to allow access to the system and not specify a subnet or IP address?
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Mar 17, 2011
A brief description of my network:It is a small home network consisting of an Ubuntu 10.04LTS server edition, an Iomega ix2 NAS, a WinXP pro server and several family laptops.This is all routed through a Netgear WNDR3300 home router. All are assigned IP's via DHCP and all but the laptops are static (via DHCP though). The WAN address/DNS is assigned via DHCP from my ISP.The problem:When one of the machines is offline, Ubuntu does not resolve the netbios name correctly. No surprise here. But what is happening is that it is finding some arbitrary machine on another network. Below is what a ping to an offline host reveals:
Code:
ping -c3 hostname
PING hostname (204.232.162.92) 56(84) bytes of data.
[code]....
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Jan 31, 2010
I've only been using linux for a few days so I don't know all the tricks. I'm pretty savy configuring windows networks however.My adapter is (according to windows) a: CNet PRO200WL PCI fast ethernet adapterLinux says it is a: 21x4x DEC-tulip compatible 10/100 EthernetI do seem to be getting an ip address from the DHCP router, but I cannout ping any other ips or connect to the internet.I've tried a bunch of different options, switching things back and forth, but it still doesn't work, and honestly i don't even know what some of the options mean.
ALSO, if this helps:
paladin:~ # ifconfig eth0
Eth0 Link encap:Ethernet HWaddr 00:08:A1:03:3C:99
[code]....
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Feb 22, 2010
I want to setup 1Gbps our lab network and we purchased 'Buffulo Giga layer switch ' with 24ports. Is there a way to tell DHCP to assign specific IP to a particular MAC address of a machine ? We want to use DHCP and whatever the port we use ,it should have same IP ..
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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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Sep 4, 2009
I hv Cent OS 5.3 installed as server. I hv a network of approx 100 desktops and laptops. For a security purpose i want to block certain laptops from gaining a the network access using dhcp. Can we block the ip address leasing if a specific MAC address request for a ip lease?
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Dec 4, 2010
I have two machines
1. Ubuntu (static IP 192.168.1.1, running dhcp server)
2. Windows 7 (dhcp assigned IP based on mac - >192.168.1.2)
Now when I fire up both machines, Linux assigns IP to win BUT they dont ping. From ifconfig I know:
eth2 Link encap:Ethernet HWaddr 00:1b:21:7b:2d:68
inet addr:192.168.1.1 Bcast:192.168.1.3 Mask:255.255.255.252
inet6 addr: fe80::21b:21ff:fe7b:2d68/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
Now I get time exceeded icmp every time I try to ping both from linux OR windows...
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Jun 9, 2009
i am using openssh 5.2-p1, i want to restrict user "admin" to login to the server from a specific IP address, for this purpose i have tried the following blocks in sshd_config file.Following is the part of the sshd_config file which i have modified
#The following commands will only allow specific IP to login to ssh.
#AllowUsers admin user1 user2
#AllowGroups
# override default of no subsystems.Subsystem sftp internal-sftp
Match Group sftpgroup
ChrootDirectory /home
AllowTCPForwarding no[code].....
i want to restrict admin user to login to the server only from 172.16.100.221 IP which can be done by using AllowUser line, but i dont want to use AllowUser line,
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Jul 9, 2010
Ive got a problem on my server ....installed Debian 5 , Webmin and than syscp settung up syscp ready ....
I try to ping "localhost" ansver ping: unknown host
I try to ping "localhost." there is a host with IP 127.0.0.1
I need it to change it in "localhost"
Is that the bind9 maybe?
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Dec 5, 2010
I have currently installed Slackware 13.1 64bit version on a laptop Acer computer. This computer is connected to my cable service (comcast) modem via a dlink router. This computer has linux and Windows 7 dual boot systems installed. Initially I was able to connect to the internet with either linux or Windows. Now I cannot get on the internet with linux, but I can with windows.
I cannot even ping the address of my internet provider,which I can obtain through windows 7 by running the program ipconfig. When I ping the address, in linux,it gives me the message that "network is unreachable".I can ping it in windows 7.If I run on linux the program ifconfig, it does not even show an ethernet, like it does on my other computer connected to this network.I set the thing up initially with netconfig and used DHCP.As I said, initially it worked.I did not use this computer for some time, and now it has the previously described problems.Where should I start, trying to run this down?I have already done everything I can think of,like powered things off, and reset the cable modem etc.
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Jul 24, 2010
I have two machines on this network, one running Ubuntu and the other running Fedora.
When I'm using the Wireless network on the Ubuntu machine, I cannot ping the Fedora machine. Everything else works. I can browse the net fine.
If I switch over to the Wired Network then I can ping the other machine.
I don't understand why ping doesn't work only over the Wireless. I can ping the router so I'm guessing it's getting blocked by the router but I didn't block ICMP traffic.
I tried asking on IRC and they ran out of ideas too to find out where the problem is.
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Feb 1, 2011
I just installed my first EVER bind DNS server. I am running bind9 on Ubuntu 10.04. Everything seems to be working great except one thing: If I ping a host that I have set up in bind by its HOSTNAME the pings take 5-6 seconds to reply/print to the screen between each echo response. If I ping by the host's IP address, they echo back very quickly.
I have read that IPv6 can cause this, but I have disabled it in /etc/sysctl.conf and the problem still exists.
I know everyone says this can't be a DNS issue, but this never was an issue with dnsmasq (which i was using prior), and it doesn't make sense that the ping are ONLY slow when pinging by hostname and not IP.
Configs below:
Ping by hostname - there is a 5-6 second delay between each one of the responses:
Code:
Ping by IP - the responses come VERY quickly one after the other:
Code:
/etc/resolv.conf:
Code:
Code:
rev.0.168.192.in-addr.arpa:
Code:
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Apr 29, 2010
So, I have an Virtual Machine running CentOS 5.4. It sits behind a hardware firewall which also does NAT'ing. I've set up plenty of these, so I know for sure the firewall and NAT rules are set up correctly. From the host, I can ping anything in my subnet and the gateway. But I can't ping anything else beyond the gateway. I can perform DNS queries and when I try to ping, it finds the appropriate IP address.But from the outside, I can ping the PUBLIC address (It's a 1 public to 1 private address NAT, not 1 public to multiple private). I've tried it with IPTABLES on and off, with no change.
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May 26, 2010
I have Mandriva One 2009.0 (192.168.1.100) on one box and Mandriva Free 2010.0 (192.168.1.118) on the other. I can ping router (192.168.1.1) from both of these boxes but I can't ping one box to the other and the other way around. What's going on?.
Do I have to change some settings in router?. Or is it firewall issue on those two machines?. Both of these boxes are connected by cable. Symbol of the router: TL-WR340G.
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May 2, 2010
I have configured DNS on ubuntu server 8.10 and it is working fine. There is one question I have though. Everytime I ping a LAN device by name I get the reply from the server with only the IP Address.
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Feb 5, 2011
how to block a specific MAC address
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Dec 23, 2010
I am using CentOS 5.5, I installed squid3 in that machine. From my users machine i am not able to use our webmail address. Outlook shows pop3 error.cannot ping webmail address inside proxy.
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Aug 5, 2011
I have vps box with debian. I have two ip addresses, but first (default) is currently unavailable. In that case there is many problem. Fortunately wget has --bind-address option so I can download. My question is how can i configure apt-get, aptitude to use specific address?
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May 8, 2010
I would like to COMPLETELY block a specific IP address using iptables. I found this one:
Code:
iptables -A INPUT -p tcp -s xxx.xxx.xxx.xxx -j REJECT --reject-with tcp-reset
Will this work? How do I undo the changes later?
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