I am unable to block this 12010 port in our server end. I used below command. But no luck.
I have blocked with CSF also .
But no luck with both firewalls
Still it is showing like this.
How to block this port 12010
i want to block tcp port with the help of iptables commands linux.which command is used for this purpose?
View 2 Replies View Relatedhow to block multiples ports from my internal lan going out to the internet?, I want to prevent LAN user's in accessing this kind of ports for example port from 1500-10000.
im making a personal firewall script, im just testing it for just curiositie's sake.
will i use the foreward chain policy?? to drop all packets, like port 1500:10000
note '#' stands for root
#iptables -A FORWARD -s 192.168.0.1/24 -p tcp --dport 1500:10000 -j DROP
#iptables -A FORWARD -s 192.168.0.1/24 -p udp --dport 1500:10000 -j DROP
Recently I discovered that we were accidentally running a POP server (port 110), when we only should have been running the encrypted version thereof (port 995). This wouldn't have been a problem if the port was blocked in the first place. I had wrongly assumed that any port NOT specifically listed in one's firewall rules (CentOS 5 with default iptables installation) would be blocked. I thought you had to add a rule to /etc/sysconfig/iptables in order to open up a port. Apparently this is NOT the case. So is it true that if I install some random software that starts listening on any number of ports that I have not specifically mentioned in /etc/sysconfig/iptables that it will not be blocked - it will work right away?
Anyway, I guess two questions:
1) What's a generic way to block a specific port? I use rules like this to "open" ports (although is this not needed if they're open anyway?)
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 995 -j ACCEPT
What's the analog of this kind of rule to *block* a port?
2) Is there a better way to configure iptables to block all ports that are not mentioned in its configuration? Is that dangerous? (will it block things that I don't want to block?)
I run SSH on a publicly open server and see following attempts in /var/log/auth.log which I was told by some one could be port scanning attempts.(Not sure though)
Code:
Nov 18 23:50:19 server sshd[21716]: Did not receive identification string from 186.0.80.197
Nov 19 00:05:57 server sshd[24056]: Did not receive identification string from 85.108.110.66
How can I block above such attempts?
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.
I would like to allow incoming and outgoing connections when I'm connected to a wired connection, but drop it otherwise. I noticed that ufw can't block outgoing traffic because of will I give iptables a try. I'm unsure if dropping packages that are outgoing will work, the rule after the block rule will allow all outgoing connections.
This what the rules are intended to do, unsure if that is actually the case. Allow all loopback traffic. Allow ping replys Allow incoming on port 12345 if eth0, deny otherwise. Allow outgoing on port 12346 if eth0, deny otherwise.
Code:
iptables -A FORWARD -j DROP
iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT -p icmp --icmp-type 0 -s -m state --state ESTABLISHED,RELATED -j ACCEPT
[Code]....
I had installed opennms im getting email alert when all port are getting down and i also getting pop and imap messaage to whn th eport get dwn i want to stop asap mesage of pop3 and imap..whether its poasssible to block partilar imap and pop3 port .
View 2 Replies View Relatedtell me the command for iptable rule to add in Chain RH-Firewall-1 to block ftp port & the ftp server was configured in public ip address,i searched in google but i did'nt get the exact command for iptables rule in Chain RH-Firewall-1.
View 3 Replies View RelatedExim: Is there away to block command when someone telnets to exim's port? Email won't send out unless they authenticate, but if there a way to total block them from typing all together, but still allow the server to receive email? IE, to block this:
[Code]...
VERY new to linux, erm but I have an issue that needs solving!I recently moved to university, where their network blocks sftp port 22, this means that I cannot connect to my FTP server which is running a version of linux.Now I've got this ftp server connected to a seedbox and it was created using the following walk through..Code:I have written this guide for a friend, but I though it would be useful for others as well.
There are several guides floating around, but I found that most always cock up in some way. This one is tried and tested to work on Debian Etch (on an OVH rps, but should apply to most servers).If there is a new stable release of rtorrent/libtorrent then I will update this guide to show you how to update it (without reinstalling the whole server).
At the bottom there are also instructions to install ftp access & some network monitoring software.Basically, I would really like someone to be able to construct the commands on how to change the listen port for sftp connection on linux or add another port to the list that Linux would use so that I could put in through putty.
I tried to make "ssh tunneling", but failed and got this message.
Quote:
Administrator@windstory-PC /
$ ssh -R 7869:localhost:7869 windowsstudy@192.168.0.4
windowsstudy@192.168.0.4's password:
Warning: remote port forwarding failed for listen port 7869 Last login: Wed Jul 21 01:56:04 2010 from 192.168.0.2 -bash-3.2$
1. system environment
192.168.0.2 - windows 7 + copssh
192.168.0.4 - centos 5.4 x86 + openssh
2. Guide for setting "ssh tunneling"
[URL]
3. Added this to sshd.conf
Quote:
AllowTcpForwarding yes
4. "netstat -na|grep 7869" at 192.168.0.4
Quote:
[root:maestro:~]# netstat -na|grep 7869
tcp 0 0 0.0.0.0:7869 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:7869 127.0.0.1:53539 ESTABLISHED
[code]....
5. result of "ssh -vvv -R 7869:localhost:7869 windowsstudy@192.168.0.4"
Quote:
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
[code]....
6. I added 7869 for telnet service as follow;
Quote:
mytelnet 7869/tcp # My Telnet server
I want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused
while
nc -v -w2 -z localhost BBBB
[code]....
I have a mail server i need it to send message via port 587 not port 25, i make some changes to my postfix server which i use and it is already successed making a telnet to 587 port like it :
[Code]....
I have recently set up a new site, and I find recently the host is not quite responding to request when I ssh to the host or just hit my site's url. I think I could be under some kind of DoS attack, because I do not think google's crawling can cause that problem. Is there any way I can figure out who is doing that? I am not quite expert for apache, and I just barely know how to install it.
Also, how can I block particular ip from the server.
I m using FC10 in my laptop. I have 3 users (including root), and i m using internet browseing, through broadband connection (like, TATA Fotone), through my USB port. I want to block only "orkut, & facebook" to my user1 and user2.
View 2 Replies View RelatedAfter installing BOT everything was blocked when I enabled BOT.After trying out some rules I can't block anything anymore.What have I done wrong?I have tried to remove all rules but still I have full access to Internet.Is there a IPCop BOT for Dummies to buy or something similar on Internet?
View 1 Replies View RelatedHow to add parental control like { block web site access, restricting login access for particular time, restrict web access} for particular user accounts in Linux.
View 5 Replies View Relatedhow to block a specific MAC address
View 2 Replies View RelatedI have blocked below IP by using iptables command in RedHat Linux 4.0.
Code:
iptables -A INPUT -s 192.168.0.85 -j DROP
It's now totally blocked and can't get access into web or internal network. how I can un-block that IP, so that it can again starts it's normal operation.
how to block PC in Squid using Mac Address. I tried as in /etc/squid/squid. conf
acl block arp 00:13:45:d3: 24:e4
https_access deny block
but it give me error as like: - (This is the output of # squid -k parse) aclParseAclLine: Invalid ACL type 'arp' FATAL: Bungled squid.conf line 1234: acl block arp 00:13:45:d3: 24:e4 squid Cache (Version 2.5.STABLE6) : Terminated abnormally
I have centos 5.3 installed with squid server. I want to block attachment in yahoo, google, etc.
View 1 Replies View RelatedHow to block unwanted sites.
View 1 Replies View Relatedi would like to block FTP and SMTP service as a part of linux server hardening.
View 14 Replies View Relatedit possible to block root access to a particular directory.
View 7 Replies View Relatedhow long mkfs will take to check for bad blocks on an 500 gig SATA drive? The drive is a warranty replacement from Western Digital. It's been running about an hour now. I had run mkfs ext3 on it before I realized I should check for bad blocks so I am running the check now.
View 2 Replies View RelatedI'm running vsftpd on a Ubuntu 10.4 server and noticed that my ftp server is getting brute force attacked. I usually check for the IP address and manually add it to my Smoothwall firewall but I was wondering if there is a way for vsftpd to automatically block denied access after certain number of attempts. Let's say 5.
View 2 Replies View RelatedHow to block your-freedom from my linux box or ipcop?I want to block "your-freedom" bypass software.I already block " www.your-freedom.net " but this program can run normally.i want to restric proxy bypassing.
View 3 Replies View RelatedHow can I block messages from people who isn't in my buddy list in Pidgin?I always receive a lot of bothering messages from people who is not in my list, I have look at all the options in Pidgin but I didn't find where to set this condition.
View 1 Replies View RelatedIn Iran there is a famous "access denied page" that redirects you to a strange page with a lot of HTML errors and lol, telling you RTFM about ridiculous Internet laws.I want to filter the contents of the page, because the page IP, URL, ... are all unknown.I don't know much about squid configuration scripts.I can read but cannot write
View 1 Replies View Related