iptables -A OUTPUT -p tcp -d serverfault.com --dport 80 -j ACCEPT. I get this error: iptables v1.4.4: host/network `serverfault.com' not found Try `iptables -h' or 'iptables --help' for more information. Do you think it is related to DNS? Should I allow it as well? Or should I just put IP addresses in the rules?

For example: iptables -A Stack Exchange Network. Stack Exchange network consists of 177 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. iptables router problem “Help” 25 Useful IPtable Firewall Rules Every Linux Administrator Start/Stop/Restart Iptables Firewall. First, you should know how to manage iptables service in … iptables rules to allow HTTP traffic to one domain only iptables -A OUTPUT -p tcp -d serverfault.com --dport 80 -j ACCEPT. I get this error: iptables v1.4.4: host/network `serverfault.com' not found Try `iptables -h' or 'iptables --help' for more information. Do you think it is related to DNS? Should I allow it as well? Or should I just put IP addresses in the rules? iptables help on Linux server - LinuxQuestions.org

Aug 14, 2015

Man page of IPTABLES - Netfilter Help. Give a (currently very brief) description of the command syntax. PARAMETERS The following parameters make up a rule specification (as used in the add, delete, insert, replace and append commands). -4, --ipv4 iptables-apply(8), iptables-save(8), iptables-restore(8) Basic Guide on IPTables (Linux Firewall) Tips / Commands Nov 12, 2016

Sep 26, 2019

iptables is a user-space utility program that allows a system administrator to configure the IP packet filter rules of the Linux kernel firewall, implemented as different Netfilter modules. The filters are organized in different tables, which contain chains of rules for how to treat network traffic packets. Different kernel modules and programs are currently used for different protocols How To List and Delete Iptables Firewall Rules | DigitalOcean Aug 14, 2015 2.8.9. IPTables Red Hat Enterprise Linux 6 | Red Hat Included with Red Hat Enterprise Linux are advanced tools for network packet filtering — the process of controlling network packets as they enter, move through, and exit the network stack within the kernel. Kernel versions prior to 2.4 relied on ipchains for packet filtering and used lists of rules applied to packets at each step of the filtering process. iptables command in Linux with Examples - GeeksforGeeks