Iptables allow ip range. 4 iptables -A xxx --src 1.

Iptables allow ip range Like iptables -A OUTPUT -p tcp --sport 123 -d 1. to allow specific IPs. Based on the question here Using iptables to redirect ip address I was able to extract this command. IPX if you want to block it to a single host Filtering packets based on source. Using an IP Address Range Allow outbound To allow traffic from a specific range of IP addresses, for example, from 10. Or to open up a I require a configuration of iptables file which will allow me connection through only specific ip-address say 10. Ideally, I would like to set up a cron job to swap out the IPTables rules to start and stop all traffic for the specified IP ranges/addresses. 0/8 subnet on the private side. iptables is administration tool for IPv4 packet filtering and NAT under Linux kernel. 40-74. deny is not the recommended method to allow SSH only for a few IPs. 187. 1 -j ACCEPT iptables -A INPUT -p tcp --dport 2001 -j DROP service iptables save and everything work fine. Iptables allows you to filter packets based on an IP address or a range of IP addresses. Now your INPUT chain will look like: Chain INPUT So as mentioned in the comment the order matters! To be on the safe side, netfilter encourages to change iptables policy for the INPUT chain to drop so then you only allow IP addresses or ranges you want. I want to allow incoming FTP traffic. 5 iptables -A INPUT -p tcp -s 192. 4 ban a range of ips except for one included in range. 156, One commonly used feature in iptables is blocking ICMP traffic, often generated by the ping utility. 23 -m state --state NEW -j ACCEPT. 110 -j DROP but it does not work. iptables -A INPUT -s 192. 5 -j ACCEPT # allow 1. 240. 114. 16 I need to know the correct way to restrict any access to a Virtualmin server, since there is no iptables and I’m not sure what is the best practice. 255 is a not a range, it's the subnet 201. 212. firewalld is available on the following Linux versions:. I have only installed ipset but have not configured it yet. 100-192. I want allow only specified ip addressess to connect on ports 80 and 443 to my machine (host). The following example demonstrates how you could use an iptables rule to allow a Cloudflare IP address range. X. 43 –p icmp –j REJECT first time post to ServerFault so I'll try and get it right :) I have multiple environments (e. xx. If you’re looking to block a specific range of IP addresses, meanwhile; type in the following, replacing [START] and [END] with the endpoints of the range (via Chron): iptables -A INPUT -m iprange –src-range [START]-[END] -j DROP On CentOS 7 i Use following commands to drop some port and allow for one IP : iptables -A INPUT -p tcp --dport 2001 -s 1. To do this, I have typed this command: ipset -A myIpset 197. xx --dport 5432 -j ACCEPT iptables -I INPUT -p tcp -s yyy. 125. 80 -j ACCEPT i want to allow all traffic to specific ip, using iptables. I selected the 5 countries that target our sites Sometime it is necessary to block incoming connection or traffic from specific remote host. 0/24 -d 192. 0/24 -j ACCEPT iptables -A INPUT -p tcp --dport 22 -j DROP Replace [IP] with the IP you actually want to block: iptables -A INPUT -s [IP] -j DROP. 45. 80. Improve this question. I would like to limit the aggregate connections (of the mentioned IP range only) to 15/minute. Following tip will help you to block attacker or spammers IP address. To log packets, do the following: 1. 200 Port: 80 (Apache web server) Browser Name: X11: Crawler In other times, I receive legitimate traffic (with other browsers) from mentioned IP rage. 21. I need to find a way to block ALL traffic for specific IP addresses and IP ranges. Calculate the netmask, or use a tool like this Online IP CIDR calculator if you don't have the time to do the math, neither you have memorized that 16384 addresses is equivalent to a /18 network. Is it possible to log network packets using iptables? Yes, iptables allows you to log network packets. 10 with the IP address you want to block. 1 (allow MYSQL on Port 3306) # IP two: 192. 255) and although the IP remains within the ip range, To debug the iptables insert a rule with TRACE target into raw table: I want to allow only the ips that end with number 1 and number 250. say that shows rule number 3 allows ssh traffic and you want to block ssh for an ip range. This is exactly what they said: "Simply config your servers iptables to only allow incoming connections from CloudFlares IP ranges then set it to allow only your IP/IP range to connect on port 21 (SSH)" Could someone help me on what command I'd need to run for Ubuntu to get this effect? IP Range: 192. 97. answered Sep 24, 2021 at 3:42. prod, dev, test, etc) and I'm trying to write the IPTables file for my RHEL 6. You can I require a configuration of iptables file which will allow me connection through only specific ip-address say 10. 3 -j DROP One liner: iptables -I INPUT \! --src 1. It could be used, for example, to allow SSH traffic from a number of systems. 4 -j ACCEPT. Suppose you want to allow outgoing connection on port 25 to network 192. What I tried: ipset -A allowiplist 81. For IP Tables, the order in which you place the rules is very important. need iptables rule to accept all incoming traffic. The local system is then allowed to SSH to the remote server: # iptables -A OUTPUT -p tcp --dport 22 --dst 192. Allow IP address range on particular port using Iptables. The DROP rule is not required if your iptables default policy is configured to DROP. 0/0 --dport 5432 -j DROP Other possible explanation of your problem could be the netmask for your ips IPTables Range of Ports. 0/16 0. allow request to come in from a certain IP address. XXX. 0/24 except two ports (X, and Y), iptables -A INPUT -p tcp --dport X -j ACCEPT iptables -A INPUT -p tcp --dport Y -j ACCEPT iptables -A INPUT -p tcp -j DROP You did not specify protocol (TCP or UDP) and I am assuming TCP as it is clear above. 5 on Thu Oct 3 21:23:07 2013 *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [133:14837] -A INPUT -p tcp -m tcp --dport 21 -j ACCEPT -A INPUT -p tcp -m state --state ESTABLISHED -j ACCEPT -A INPUT -j REJECT - Iptables' rules are processed in order. Hi there if your would like to block all traffic except for a certain range of IPs using iptables you can run the following commands. 4: This is my /etc/sysconfig/iptables file. Last rule is an example for an IP range. Reject traffic from an IP address range: sudo iptables -A INPUT -m iprange --src-range [IP-address-range] -j REJECT. You can route it in one-shot. Biggest port I've seen in the list is 1194 (openvpn), so I wrote this. 10. 0/16 -p ICMP --icmp-type 8 -j ACCEPT iptables -A INPUT -p ICMP --icmp-type 8 -j DROP For more info see: Blocking a single IP address: $ sudo iptables -A INPUT -S 10. 0/24 -j DROP . In the example above, the IP address range is 192. As late as 2009, blocking 82. I want the packets that come into my host on a certain port to be redirected to a container so I use this rule: iptables -t nat -A PREROUTING -p tcp --dport 3000 -j DNAT --to-destination 10. eg. I have studied this out and I need to do this through the firewall (IPTables). 22. sudo iptables -A INPUT -p udp --dport 53 -j ACCEPT. 0/24 -j ACCEPT iptables -A INPUT -s 198. 43 on host1: $ iptables –A INPUT –s 192. linux; networking; iptables; Share. The last rule examines packets which do not satisfy either of the previous two criteria, dropping them, as per your request. 78/16 --dport ssh -j ACCEPT iptables -A INPUT -p tcp --dport ssh -j REJECT There are other ways to do it, but this is simplest when we know Can someone let me know the exact rule (command) that will only allow incoming Ping ICMP requests from IP range 10. 0/16 (so 197. 0/24 -j ACCEPT $ sudo iptables -A FORWARD -s 10. I want to allow a certain section of the subnet (say 10. 148. 0/16 and block all others ? Can someone let me know the exact rule iptables -A INPUT -s 10. (If you are using /etc/sysconfig/iptables, drop the first /sbin/iptables command) This assumes IPTables is running on the webserver. Rules were added as follows: iptables -I INPUT -i lo -j ACCEPT iptables -I OUTPUT -o lo -j ACCEPT iptables -I INPUT -s 10. how can i configure iptables, to drop incoming connections for a The module iprange allows specification of a range of IP addresses to which the rule applies, the --match multiports allows to match any of a list of ports. What is the Now, what I've got so far is the following rule, that opens the door for this range:-A INPUT -p tcp --dport 80 -m iprange --src-range 74. 0. 56. 254) to access the internet via linux router but not the rest of iptables -A INPUT -p tcp --dport 22 -s YourIP -j ACCEPT iptables -A INPUT -p tcp --dport 22 -j DROP Share. 0 to 192. 50. x and 123. 9. 1 - 197. 0/0 network/netmask). 1 on all port ranging from 0-5555 and deny all other ip-addresses? I have tried Long story short. 5. To ensure that firewalld is running on your server, run the following command. However using /etc/hosts. Let’s apply the previous rule for source IP addresses 192. You can route subnets (as close to the desired range as you need) and supplement that with how many other independent not included in the subnets IPs you need. We just need to pass the source IP addresses to the -s option with commas between them. How to allow mail through I have read some answers here about blocking IP address ranges, and have already used iptables for this purpose before. 0/24 -p all -j REJECT If you actually want to use a range of ip starting from one IP to another IP ipables -A INPUT -m iprange --src-range 192. Modified 8 years, I have the IP down to 197. iptables configuration to allow specific IP addresses and block the rest. 59" -j ACCEPT iptables -A FOR_FILTER -d '66. 0/16 ! -d 10. You should consider using iptables for that job. 1 Allow port range but deny to certain IP. iptables -A INPUT -p udp --dport 1195:65535 -j DROP iptables -A OUTPUT -p udp --dport 1195:65535 -j DROP iptables -A INPUT -p tcp --dport 1195:65535 -j DROP iptables -A OUTPUT -p tcp --dport 1195:65535 -j DROP This parameter controls the running of the list -action of iptables, which is used internally by the module. If you use nested chains (namely, EC2LIST), nested chains "return to calling chain" if nothing matches in nested chain. 43. 123. 140. 169 -j ACCEPT The problems: Everytime Google tries to access the page, it uses a different IP address, and probably out of the range I mentioned previously. If its running on a firewall, replace the INPUT with FORWARD (and optionally add -d DEST. Replace the IP addresses in the commands with the actual IP address. 10 -j ACCEPT iptables -A OUTPUT -d 123. Use the LOG target and add a message prefix: sudo iptables -A INPUT -j LOG --log-prefix "Dropped: "2. 2 -d 10. For example, to accept packets from What would the command be to block a range of IPs to port 80? The block of IP I want to block is 123. Viewed 39k times 24 . 0/18 on net CIDR notation. 192. This cheat sheet-style guide provides a quick reference to iptables commands that will create firewall rules that are useful in common, everyday scenarios. tryed by adding lines: /sbin/iptables -A INPUT -p tcp -s XXX. 20-10. my server has two ip's: # IP one: 192. It is suggested to use ipset in combination with iptables. . sudo systemctl status firewalld Run the following command to block the IP address and to add the rule to the No such thing as range routing. 0/16 -j SNAT --to 192. Specifying a Single Target Server and Port (no ranges) Allow outbound access to a single target server (192. iptables FORWARD rule. In this case, insert (iptables -I) the rule either: as the first rule; sudo iptables -I or before the allow rule; sudo iptables --line-numbers -vnL. WINPE1 = 192. Raspberry Pi + Owncloud + Iptables. 0/14. apache 2. Share. 0 or 46. Use this if iptables hang when creating a chain or altering policy. I'm trying to set up an IPtables rule that will forward all packets to a /22 range to a single IP and port for debugging purposes. 8. 23) on port 22. 6 -j ACCEPT # allow 1. XXX -j ACCEPT /sbin/iptables -A OUTPUT -p tcp -s How do I allow certain ips and block all other connection in iptables? As Gilles demonstrates the concept goes like this: Add ACCEPT rules for each specific thing you want You can set multiple source (-s or --source or destination (-d or --destination) IP ranges using the following easy to use syntax. I guess iptables expects a set of ports attached to a rule with protocol (tcp or udp), probably you would need "any" like in Cisco (in whatever syntax iptables accepts an any) to be explicitly supplied to allow the traffic. Your question is unclear. 2 - 10. 3. Ask Question Asked 3 years, 9 nat -A POSTROUTING -s 10. You can use the -j LOG target in your rules to log packets to the system log. Hey guys in my iptables file I have the following line:-A INPUT -m state --state NEW -m tcp -p tcp --dport 20000:25000 -j ACCEPT Because I'm trying to open a range of ports that will need to be open for multiple (Yes THAT many multiple) different minecraft servers. There have been times when an entire country shared a single IP address. This tutorial shows you how to use multiple IP address in source or destination with IPtables on You need to use the full IP address in the range e. : iptables -t nat -I PREROUTING -p tcp -m tcp --dport 10000:20000 -j DNAT --to [local_ip]:10000-20000 It works perfectly. If firewalld is not running, go to the iptables section. What I expected: That should allow connections between 81 _212 iptables -A maybeAllow81_212 -m set --match-set denyiplist_81_212 src -j DROP iptables -A maybeAllow81_212 -j ACCEPT iptables -A INPUT -s 81. And your rule is actually a "permit ip" type of rule, aka L3 or protocol agnostic. something like this(but it doesn't work): iptables -A FOR_FILTER -d "66. Blocking a range of IP addresses: $ sudo Please note these are just sample IP ranges not the ones I want to stop writing log entries for. allow DNS. d1. Allow ssh incoming/outgoing and blocking all outgoing besides specific ports. 224. 4:3000 This allow to do (outside packet)# --> HOST:3000 --> CONTAINER:3000. 237. 59 won't work because of this DNS resolve. ⚔️🧱🔥🛑IP BAN Block Allow GEOIP country traffic limit server input/output to IP countries with iptables+xt_geoip, auto db-ip update, firewall fail2ban gfw ufw cidr blacklist netfilter rules persistent restrict netaddr xtables linux debian ubuntu apache nginx web server anti hack ddos firewalld ipblocks ipdeny ip ranges doug@s18:~/iptables/misc$ sudo iptables -xvnL Chain INPUT (policy ACCEPT 95 packets, 6543 bytes) pkts bytes target prot opt in out source destination 0 0 DROP all -- enp3s0 * 172. 51. 1 on all port ranging from 0-5555 and deny all other ip Now, change your iptables rule to reflect this bigger net: Using this CIDR notation on your rules, you can allow broader networks as you will, instead of listing all /24 networks that integrate this So this is also specifying a port range: iptables -A INPUT -p tcp --dport 1000:2000 -j ACCEPT. 244. 0/16 -j REJECT sudo iptables -A OUTPUT -s 31. iptables -A OUTPUT -d 123. 0 -j ACCEPT iptables -P How can I block a serie of IP with iptables ? e. Improve this answer. To answer your question, you first allow the desired IP address using the -I flag which indicates that you want to put the rule on top. 0/16 -j REJECT Step 4: Block a Range of IP Addresses. 126 to 10. 64. 0/16 -j REJECT sudo iptables -A OUTPUT -s 104. 36. 5 iptables -A xxx --src 1. 31. 121 Allow only traffic from specific ranges. sudo iptables -P OUTPUT ACCEPT sudo iptables -A OUTPUT -s 157. 19 -m conntrack --ctstate NEW -j ACCEPT iptables -A FORWARD -m iprange --src-range 192. 59 Each one of my containers have an ip address in 10. Therefore, I can't block this IP range completely. Skip to main content. 192. About; IPTables Range of Ports. 20 through 10. 168. net The rule I wanted to apply to 66. X can be any number from 1 to 255. yy. 0/24 network and otherwise drop the traffic (to port 22). To block incoming ICMP traffic, use the following command: Also note how when the rule was created with iptables -A INPUT -i lo -j ACCEPT without any restrictions on ip-address (ranges) with a either -s ip-address[/netmask] and/or -d ip-address[/netmask] the rule applies to any source and destination ip-address (the 0. Stack Overflow. 250. Red Hat® Enterprise Linux 7 and later. 217. Follow edited Sep 24, 2021 at 3:59. 69 would have blocked thousands of people (though not all Allow client to client communication in OpenVPN for certain IP range. 41 and 192. CentOS® 7 and later. 57. iptables -t nat -A OUTPUT -d [ipaddress1] -j DNAT --to-destination [ipaddress2] I have webserver in docker container, but I cannot configure iptables on my host (Debian). In your example, 201. Iptables is a software firewall for Linux distributions. 0/0 Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 60 packets, 6821 bytes) SYSTEM INFORMATION OS type and version: CentOS Linux 7. This includes iptables examples of allowing and blocking various services by port, network interface, and source IP address. Also, if you specify a port number, you need to state a protocol that supports ports, so the revised rule would be: Only allow certain IP's to access website, EXCEPT a specific URL (open to any IP) This post explains how to use iptables with a range of IP addresses and/or ports. Vlam Vlam. Follow edited Apr 8, 2020 at 5:25. e. 6. How do I go about this ? Skip to main content. Community Bot. 6 -d 10 How to negate a range in iptables? Ask Question Asked 12 years, 9 months ago. 0/14 -j FirewallD allow IP Range to port not working. 186. In that page, choose France then select "Linux iptables accept" as the output format. 229. 1 -d 10. 0/24 but this added 65536 IPs to my ipset, making it huge and now I cannot add more IPs to it. x. How to mount nfs share using autofs. 0 (such as from 10. I found this site ip2location. iptables port redirection on Ubuntu. 1. 2. How to add multiple sources in a single iptables command. And of To allow all ports for local IP range 192. 973 Virtualmin version: 6. 0/16 -j ACCEPT iptables -I INPUT -s 172. 8 -j ACCEPT iptables -A INPUT -p tcp --dport 123 to make sure that connections in the reverse direction are only to the allowed IPs from the allowed ports. 245. 1 Block SSH from all other IPs: #>iptables -A INPUT -p tcp -s 0. Fedora® 18 and later. 0 So I tried to block wide range of ports via Iptables. Trying to make This tutorial shows you how to use multiple IP address in source or destination with IPtables on Linux. 2. -I takes an argument of an integer that's the location in your ruleset you want the new rule to be Then you can use the following command to add a rule that allows access to the containers from a specific IP range: sudo iptables -A DOCKER -s [your ip range] -j ACCEPT Share. What might be wrong here ? sudo iptables -P INPUT DROP. xxx. If you want to block a range of IP addresses instead of a single address, use the following command: sudo iptables -A INPUT -s 192. Even blocking a single IP address can block lots of legitimate traffic. 0/16 -j ACCEPT iptables -P INPUT DROP After running the following curl fails to access the IP address / the domain name. I'm not sure if IPTABLES has a specific command for this or if it is a subnetting problem. 0/24. The goal will be to add various whitelisted public IPs and lockdown the site so that it is only accessible to some. How do I block specific incoming ip address? Following iptable rule will drop incoming connection from [] ACCEPT all -- anywhere *. I have this ipset in place that is blocking every IP that tries to hack on my server. 4 -j ACCEPT # allow 1. 30. It works great. 1 y 192. What would the correct command be? iptables -I FORWARD -p tcp --dport Ensure that the GeoIP module is installed with iptables-addons. 100. iptables "Bad argument `MASQUERADE'" 2. ( 30000 to 10000, 40000 to 20000 etc ) If the port range is the same i. In the same way, you can block a range/subnet of IPs. # iptables -A INPUT --source Trusted_IP -p tcp --dport SSH_PORT -j ACCEPT iptables -I INPUT -p tcp -s xxx. I want to block outgoing packets to an IP range but the iptables command I'm using does not seem to work. Sometimes you need to allow a specific port for a specific range of IPs or network. 254 -p all -j REJECT This will use an ip range of the same effect of the class C showed above. You can easily get the France IPs for the iptables using the below page. Example 2. iptables -A INPUT -p tcp --dport 123 -s 1. iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -i lo -m comment --comment "Allow loopback connections" -j ACCEPT iptables -A INPUT -p icmp -m comment --comment "Allow Ping to work as expected" -j ACCEPT iptables -A INPUT -s 192. Modified 12 years ago. I've seen IPTables - Allow (ACCEPT) specific IPs within a blocked (DROP) subnet. IP after FROM. 12. I want to redirect incomming requests on a port range ( 30000 to 40000 ) to a different host on a different port range ( 10000-20000 ) mapping them 1 to 1. iptables allow http incoming connections, state NEW, ESTABLISHED. GeoIP is a collection of IP addresses corresponding with the geographical locations mapped with the IP addresses allocated for a specific organization, city, state, and country. 2009 Webmin version: 1. Log Dropped Packets. That's why you must configure first the allowing rules and then the denying rule. omtrdc. In the example above you would replace 10. Ask Question Asked 8 years, 3 months ago. 9 -j DROP. 13. yyy. I want to allow all ips with client port 27005 and drop the rest. 5 --dport 80 -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j DROP iptables -A INPUT -s 192. 16. 41,192. Stack Exchange Network. sudo iptables -A INPUT -p tcp --dport 443 -s 172. 4 iptables -A xxx --src 1. 0-201. 6. htaccess file ↗ or by using iptables ↗. 0/12 (so my server has the access from the original IP address and the newly specified range. If true, then iptables skips the DNS-lookup of the IP addresses in a chain when it uses the list -action. Please remember to run Im trying to allow connections from a specific IP range. 1-192. 0/0 --dport 22 -j DROP. To do so, you need to specify it after the-s option. The syntax is: iptables -A INPUT -s ip1,ip2,ip3 -j ACCEPT service iptables restart iptables --flush iptables -P INPUT DROP iptables -A INPUT -i lo -p all -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 10011 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 30033 -j ACCEPT iptables -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT iptables -A OUTPUT -p tcp -m tcp --dport 22 -j ACCEPT iptables -A INPUT -s 194. # Generated by iptables-save v1. 255. 1. I'm using the entire 10. Please just replace the IP by subnet or range. sc. Feed this tool with the number of hosts(16384) and the network ip address(46. 105-192. 10 -j DROP. Hot Network Questions I am trying to use in DD-WRT iptables to block an ip range Ex: I want to block iptables -I FORWARD -s 192. 11. Does not affect the actual functionality. 138. 0 /16 . 235. Ask Question Asked 12 years, 5 months ago. 34. Follow edited May 23, 2017 at 12:40. I would like to add the IP address as is, so iptables won't add the resolved domain. If you only want to allow a certain range of IP addresses inside of 10. 1/16 -j DROP iptables configuration to allow specific IP addresses and block the rest. I would like to block access for pop/smtp/imap for all IPs starting with 197. 5. iptables -A INPUT -p tcp --dport 22 --source 192. 4, drop it A more elegant solution: iptables -N xxx # create a new chain named xxx iptables -A xxx --src 1. 7. 6 servers which allows specific groups of machines to talk between those environments on defined ports. Follow edited Jun 29, 2022 IPtables block range with exception. You can explicitly allow these IP addresses with a . Do you want to allow only SSH connections? If so, you can use these rules: iptables -A INPUT -p tcp -s cidr_here --dport 22 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -p tcp --sport 22 -m conntrack --ctstate ESTABLISHED -j ACCEPT I would like to allow a certain IP addresses or a whole network (source) to reach my servers with ssh connection and to drop all other unauthorized iptables -A INPUT -p tcp -s 12. 4 -m tcp -p tcp --dport 777 -j DROP # if it's not 1. 2 (disallow MYSQL on Port 3306) . 4 -j ACCEPT iptables -A INPUT -p tcp --dport 123 -s 5. 10. 0/16 -j REJECT sudo iptables -A OUTPUT -s 192. # iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # iptables -A INPUT -i lo -m comment --comment "Allow loopback connections" -j ACCEPT # iptables -A INPUT -p icmp -m comment --comment "Allow Ping to work as Now I want to leave some IPs talking to the How to allow certain clients to talk to others in the same IP range when client-to-client $ sudo iptables -A FORWARD -s 10. This is what I used for sharing a public ip (WAN) to the local lan: iptables -A FORWARD -o eth0 -i eth1 -m iprange --src-range 192. Lets say I want to also add access to ip address range 54. 9. yy --dport 5432 -j ACCEPT iptables -I INPUT -p tcp -s 0. 227 -j ACCEPT Example 1. allow and /etc/hosts. When a rule matches, processing stops. To avoid blocking Cloudflare IP addresses unintentionally, you also want to allow Cloudflare IP addresses at your origin web server. 7. 0) and you will have the mask: 255. The ‘/24’ denotes the subnet mask, representing the range of IP addresses. 2-192. About. g. 6 iptables -A xxx -j DROP # We can use the -s option of iptables also for setting multiple source IP addresses. 5 -p tcp -j ACCEPT If you cannot find a common netmask that covers the IP's you want, you'll have to write several identical rules to do what you want. This is only possible if you can aggregate the source IP's you want into a contiguous range. 19 -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT iptables -t nat -A POSTROUTING -m This assumes you are using a script which calls IPTABLES. 160. 0. com to generate a list of IPs to ban by country. I need to be able to restrict any access to the server: for one or more countries, one or more network To block outgoing traffic to a specific IP, please use the below command and specify the destination IP using “-d” option: iptables -A OUTPUT -p tcp –dport 22 -d 192. CentOS 5. 5 -p ICMP --icmp-type 8 -j ACCEPT iptables -A INPUT -p ICMP --icmp-type 8 -j DROP I wrote these rules in response to these guidelines: Only allow HTTPD traffic from WINPE1. For example, to allow traffic from 192. 80) you can use the following command: iptables -A INPUT -i eth1 -m iprange --src-range 10. to allow minimizing storage space usage. Port 22 sho You can allow or block specific IP addresses or IP ranges using rules like iptables -A INPUT -s -j ACCEPT or iptables -A INPUT -s -j DROP. Restricting MySQL 3306 port to localhost with IPTABLES. But when i want add another ip to allow with this command it doesn't work for second IP. 152 iptables -I INPUT -p udp --dport 1194 -j ACCEPT iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -I FORWARD -s 10. wykdmi rpcr honsn hfuj fxh dgvq yshjb hajjmr nqeo mwmu