CentOS 5 :: Edit The Iptables To Include Some Ports/ip For Openfire Server?

Jun 16, 2010

I am trying to edit the iptables to include some ports/ip for openfire server. The problem is the computer is very locked down with permissions...I logged in as ROOT with ID 0.Now the iptables has ROOT for permission BUT ID 1 which reflects BIN.As root i cant edit or chmod/chown the iptables. Here is what i tried:

1. change password of BIN - successfully changed with no errors BUT still cant su BIN with the new password...

2. tried changing the ID of ROOT to 1 but I dont have permission to use the command....

so anything i can do here??? I dont have permission with Shadow either...

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Ubuntu :: Edit Grub.cfg To Include Windows 7?

Jun 29, 2010

I just did a fresh install of Lucid Lynx 10.4, but now whenever I boot up, at the boot loader, Windows 7 is no longer on the list. I want to now how to properly edit grub.cfg in /boot/grub so that I can boot into Windows 7 from the boot loader. The Windows partition is found in /dev/sda2. The folder name is 2EB2621EB261EB33. If anyone could tell me how write the entry in grub.cfg for Windows 7 to boot that would be awesome!

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Programming :: View / Edit C Include Path?

Jul 5, 2010

For gcc, it seems that there are multiple include paths like /usr/include and /usr/src/linux/include. How do I check the current include path for gcc via command line? How do I edit it?

What about for cc?

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CentOS 5 Server :: VsFTP Iptables Wont Start Get Error - CentOS 5.5

May 11, 2011

i am currently trying to install vsFTP onto my new linux server and btw i just started using linux today this is my first time using linux so i got the ftp installed good it got downloaded and everything then i went to open a port for my server for vsFTP i used this comand to open it "-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT" then i closed it by pressing ESC then :wq! and it brought me back to my comand line again so now when i try to start the ip table thing with the comand "service iptables start" then when i execute that comand putty respondes with this "Applying iptables firewall rules: iptables-restore: line 1 failed [FAILED]"

The install Guide im using: [URL]

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Networking :: Cant Open Any Ports In Iptables?

May 14, 2009

Since there was no response on my other post which i spent about a hour writing, ill go for something simpler. I run this on my server

# set default policy for the NAT table
iptables -t nat -P PREROUTING ACCEPT


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Networking :: Forwarding Ports With Iptables?

Dec 23, 2010

I am running a server with ssh and a vpn server set up. It is behind a debian router with a firewall which uses iptables. i have it set up to forward ports 22 and 443 to ssh on a computer within the LAN(so when on a restricted network i can still ssh into my network) and forward anything to 1723(for my vpn) to that box also. However, the only port that gets successfully forwarded is port 22. The other two appear closed. here is what the script looks like:



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Security :: Anyway To NOT Log Dropped Ports 137 / 138 In Iptables?

Mar 30, 2011

We do NOT support samba on our Unbuntu servers but still zillions of windows machines are constantly trying to connect on the SMB ports. I've added a rule that drops access to destination ports 137-138 and that seems to work. But it creates many many log entries documenting that the packet has been dropped. I've been researching and cannot come up with a way to suppress logging for these drops.

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Fedora Networking :: Iptables On Bridge Ports?

Apr 21, 2011

I'd like to pass all traffic between bridge ports via the FORWARDING chain, so I changed following sysctl parameters:

net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1


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Networking :: Set Any Ports On Iptables For One Specific Host Only?

Feb 16, 2011

I like to set in iptables to allow access from one host to my server on any ports.

Currently the iptables have been configured to deny all and to allow access only to those I've specified.

Can anyone advice on the command to achieve this?

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Networking :: Iptables - Portforward To External IP And Ports?

Jun 30, 2011

I want to portforward client connections from an ubuntu lts server to another external server. btw i am a noob on iptables. i have tryed using the basic commands for iptables with no success. For example:iptables -A PREROUTING -t nat -i eth1 -p tcp --dport 7878 -j DNAT --to -A FORWARD -p tcp -i eth1 -o eth0 -d --dport 7878 -j ACCEPTso basically i just want a rediraction for from one ip to another. Example: A client tries to connect to ip on port 7878 and the server forwards him to ip xx.xx.xx.xx on port 7878, meaning that xx.xx.xx.xx is the actual server with services. Server with ip is only forwarding the client to external ip... how can this be done in a simple command?

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Software :: Configure IPTABLES To Allow Certain IP Ranges To Ports 25 And 465?

Feb 16, 2011

I have a mail server with IPTABLES enabled.I want to allow access to:


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Software :: Open Ports Using Iptables From Shell?

Sep 18, 2009

I am trying to open VNC ports(5901,5902) on my RHLinux machine using iptables. I am able to do it from GUI system-config-security. Go to the Administration > Security Level and Firewall, then select "other ports" at the bottom and enter the portNum 5901 to open and select tcp, then click OK and OK again to save your settings. From my windows m/n iam able to open vncsession using vncviewer on 5901 port.But when I am trying to do it from command line:#iptables -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 5901 -j ACCEPTThis command added the entry in /etc/sysconfig/iptables and listed in iptables -L command.Then I saved and restarted the iptables.#service iptables save
#service iptables restartWhen I am trying to open the VNC session from vncviewer, it is giving me error and session not opened.Is there some thing I missed here? where can I check the logs for this? I definetly need

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Ubuntu Servers :: How To Edit The File Ports.conf

Jul 8, 2011

I want to edit the file ports.conf to make Apache to listen only to loopback interface as described [URL]... here ,The text extract follows


The Listen directive specifies the port, and optionally the IP address, Apache2 should listen on. If the IP address is not specified,Apache2 will listen on all IP addresses assigned to the machine it runs on. The default value for the Listen directive is 80. Change this to to cause Apache2 to listen only on your loopback interface so that it will not be available to the Internet, to (for example) 81 to change the port that it listens on, or leave it as is for normal operation. This directive can be found and changed in its own file, /etc/apache2/ports.conf

But by typing [CODE]sudo vi /etc/apache2/ports.conf [/CODE} and opening the file I am not able to edit the file After going to the Listen Directive I am not able to type 127.0..0.1, Since what I type does not appear on the screen, the Keyboard is not working. How will I be able to edit the ports.conf and other configuration files

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OpenSUSE Network :: Block All Ports But Port 80 With Iptables (DMZ)?

Jun 25, 2010

I have a Suse 10.3 router with 4 network cards. 1 is to connect to the big network and thereby also the internet, 2 are for 'client' subnets and I want to use the last one as a DMZ. In this DMZ will be a web server which has to be accessible from the other 2 subnets and from the big network. I could do it with a few simple clicks in Yast firewall, but I have some issues with this firewall and there for I want to use it as minimal as possible, using Iptables.

So now I'm struggling a bit with Iptables. Basicly what I'm looking for is how to block all ports but 80 in this last subnet with iptables.

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General :: Block All Ports Except SSH / HTTP In Ipchains And Iptables?

Jun 15, 2010

How can I block all ports except

ssh (port 22)
httpd (port 80)

using iptables and iphains?

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Ubuntu Security :: Block All Ports Except Pop And Smtp In NAT Through Iptables?

Jan 20, 2010

how to block all ports except pop,pop3,smtp in nat using iptables in squid on redhat A3

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Ubuntu Servers :: Iptables Allow Ports To A Specific Ip Or Domain Name?

Jul 23, 2010

How to configure iptables to allow only 22,80,3306 ports for only a dynamic public ip/dyn dns domain name on a ubuntu server?

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Ubuntu Networking :: Set Any Ports On Iptables For One Specific Host Only?

Feb 15, 2011

I like to set in iptables to allow access from one host to my server on any ports.Currently the iptables have been configured to deny all and to allow access only to those I've specified.

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Networking :: Configuring Iptables To Locally Translate Some Ports?

Apr 27, 2011

Because my ISP is blocking every IP port under 1000, I'd like my local nat'ed server to be able to translate incoming and outgoing traffic from some port above 1000 to the default server port locally.Example :

To connect to my IMAP server (default port : 143) from the outside,I'd connect to my public IP, port 1143 (opened and nat'ed to the right server on my router) and the server would translate this port to 143 on the same machine.I wish I could simply configure my router to do that but sadly Linksys doesn't permit such setting... I also could modify the listening port of my server but I prefear to keep the default port inside my network.I think that iptables is the right tool to do that and I never used it and I must say that this tool is not so easy to configure at first sigh

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CentOS 5 Server :: Configuring Piranha To Load Balance (Direct Route) 2 Ports

Feb 18, 2009

I seem to be having a strange problem configuring Piranha to load balance (Direct route) 2 ports across 2 w2k3 servers in a test environment. What is strange is that 1 of the ports are working fine but the other port doesn't work. I've read many how-to and after many frustrating hours I disabled the firewall, iptables and arptables services and one of the ports are load balanced across the 2 real servers. Here's the environment.


I can telnet from the client to the realserves on both ports and it's works. When I telnet to the VIP only one port gets through and the other gives me "could not open connection to host port 32777 : connect failed. The configuration in Piranha for one port is the same as the other. I can't help but think that some other configuration for port 32777 was missed.

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Networking :: SQUID Intercept IPtables - Whitelisting Ports And Sites

Jul 6, 2011

I'm having some issues settings up a transparent proxy server, which should allow only regular web browsing (port 80), any other port (including HTTPS (443)) has to be blocked, as well as any other port. Right now, I'm using Debian 6 and Squid3. The server only has one NIC. The topology is like this:
Clients <-> Proxy Server + DHCP Server <-> Internet

With this setup, the network does have internet access and the websites I whitelisted are the only ones accesible via browser, however port block is not working, every port is open, hence why trying to access blacklisted websites through HTTPS is possible. Seems to me Squid3 is doing it's job fine, however IPTABLES for some reason seems to be redirecting all the trafic to port 3128 (Squid3 port). I could be wrong, but I've been unable to do anything related to ports with squid3 (either whitelisting or blacklisting).

For Iptables I used:
iptables -A PREROUTING -t nat -i eth0 -p tcp -j REDIRECT --dport 80 --to-port 3128
iptables -A INPUT -i eth0 -m tcp -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -i eth0 -m tcp -p tcp --dport 22 -j ACCEPT
iptables -A INPUT -i eth0 -m tcp -p tcp --dport 3128 -j ACCEPT
iptables -A INPUT -i eth0 -m tcp -p tcp --dport 443 -j DROP

Squid3 config:
acl manager proto cache_object
acl localhost src ::1
acl to_localhost dst ::1
acl Safe_ports port 80 # http
acl whitelist dstdomain "/etc/squid3/whitelist"
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny !whitelist
http_access allow localhost
http_access allow all
http_port 3128 intercept
hierarchy_stoplist cgi-bin

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CentOS 5 Server :: Can't Edit /etc/bashrc File / Make It Possible?

Apr 20, 2010

I am having a lil headache with it.
Some time ego i edited my /etc/bashrc file to add some aliases and colours for my ssh console.
Today i had a need to change few thing but for some reason i can't edit or delete this file any more.

I am logged as root.

rm bashrc
cannot remove, operation not permitted

chown and/or chmod fails as well with "not permitted" errors.

ls -Al | grep bashrc
-rw-r--r-- 1 root root 2514 mar 31 13:05 bashrc

Any ideas what's going on?

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CentOS 5 Server :: Port Configuration - Being Blocked - Iptables And Connection

Jul 4, 2009

I have a fresh installation of CentOS 5 I'm using for a server, and I'm having issues with port configuration. I have iptables running, and it started with no /etc/sysconfig/iptables file. I added a few basic rules (port 53, port 10000 for webmin), saved the file, and restarted the service. I tried connecting to webmin, scanned ports, and traffic was blocked. I set iptables to allow all traffic and restarted the service, and it still showed basically every port as being blocked. It seems port 80 and port 22 work for some reason, even when I tell iptables to block all ports.

I'm not sure what's going on here. Iptables is reading the /etc/sysconfig/iptables file, and if I use lynx localhost:someport it responds as it should according to the file. However, if I try connecting by IP, it's like there's some other firewall or something running that does whatever it's configured to do.....

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CentOS 5 Server :: Fail2Ban Is Up And Running - IPtables Rules Not Created

Nov 18, 2009

I have been trying for days now to get this to work. didn't want to bother people with my questions, i have installed Fail2Ban 0.8.4 on CentOS 5.4.

I get the email notifications from Fail2Ban stating that it just blocked another IP, however, when i look at the iptables through webmin, nothing is actually in there, also the log/secure file dose not show that the ip has been blocked.

Even when I try to log-in with the wrong password, after a few tries i get the email telling me that my ip is blocked, however, I can still SSH using my 'blocked' IP.

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Software :: Not Able To Installed Openfire Database?

Sep 22, 2010

not able to installed openfire database setting standarad connection below error i have got, if anybody has installed openfire thenchecked error log but no use )A connection to the database could not be made. View the error message by opening the "/logs/error.log" log file, then go back to fix the problem.

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CentOS 5 :: Custom Iptables: Remove The Existing Iptables First?

Apr 28, 2009

To expand: I'm trying to set up a box with l7-filter, and I need to patch and compile iptables as part of the process. I ./configured it with the prefix= argument so it would install into /sbin instead of /usr/sbin, and I did a yum remove iptables before installing it so as not to get in the way of the original iptables, but I'm wondering if this is really necessary - it's kind of annoying, because removing the original iptables removes the init.d script, deregisters the service, etc. If I don't, is it possible that iptables might get overwritten in a system update or something, or will yum see that I've got a custom/newer version in there and leave it be?

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CentOS 5 Networking :: Configure - Set Iptables On Server 1 - To Acces Webserver From Other City

Jan 13, 2010

I am using centos 5.3 , and also using webserver in local network

Here is all configuration

1, server

eth0 , this is live ip

2, webserver


I want set iptables on server 1 , to acces webserver from other city ,

How to configure iptables

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CentOS 5 Networking :: Iptables Not Opening Port To Connect Via Vnc To A Server Running 5.5?

Apr 27, 2011

I'm trying to open up some ports to connect via vnc to a server running Centos 5.5. I've edited /etc/sysconfig/iptables everything *looks* fine, but I still can't seem to get access to the port I've opened (I added some newlines for clarity between commands):


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CentOS 5 :: Edit Bios - Compaq Evo 5.4 Web Server Fails To Restart From A Power Outage

Jun 7, 2011

I have a small problem on my Compaq Evo Centos 5.4 web server. The web server runs just fine, the problem is it fails to restart from a power outage. Simple edit the BIOS. No! For a reason I can't think of the keyboard stops working after a few key strokes following the F10 to enter BIOS setup. Then its a power cycle. If left to BOOT the PC and keyboard are fine. After hearing about viruses which get to the BIOS I will ask can NIX get that far so I can adjust the Power ON?

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Red Hat / Fedora :: Edit /etc/sysconfig/iptables And Create/delete Rules Inside That File?

Sep 9, 2010

can i actually edit /etc/sysconfig/iptables and create/delete rules inside that file?will it work? i just find using the IPTABLES -A or -D command a hassle

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