checkpoint firewall basics

CheckPoint i-security SP-5500 Standard 3 Gigabit Ethernet port, the network can be extended to 12 when the application needs, there is a series of control port. In addition, this product adopts redundant power supply design, which increases the operation stability and maintainability of the platform. I-security's hardware acceleration device uses the security optimization chip and the burden Load engine technology (TOE) application, shares the CPU mos

Description of the phenomenon:using the checkpoint firewall as a security gateway, the network is fine, but the Voip(H323) service is not working. Here's how to fix it:the Voip Each endpoint IP Summary Group, as the source address and destination address, see Figure a650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M00/89/C0/wKioL1gb6rShbNPZAACyFYyb1CQ768.png-wh_500x0-wm_3 -wmp_4-s_4293603484.png "sty

Server0:# firewall-cmd--permanent--zone=public--add-source=172.25.0.10# Firewall-cmd--zone=public--list-all# Firewall-cmd--reload# Firewall-cmd--zone=public--list-allVirtual Machine desktop0:# Firefox http://172.25.0.11##################################################Implementing a native port mappingPort redirection

-cmd--zone=public--list-allfirewall-cmd--permanent--zone=public-- Add-service=httpfirewall-cmd--zone=public--list-allfirewall-cmd--reloadfirewall-cmd--zone=public--list-allDefault zone modification, default is permanent, do not add--permanent########################################################Virtual machine Server implements port forwarding for native? Port redirection for on-premises apps (5423-80)– Requests from the client to access server 5423 are automatically mapped to the native 80– F

Date: October 30, 2016Usually in the Linux experiment, the Linux system will be shut down the firewall, to avoid being affected when doing experiments. After the system installation is complete, turn off the iptables firewall with SELinux and check the status of the firewall first: Service Iptables StatusTo view the SELinux status command:/usr/sbin/sestat

iptables Plug-in module Usage:-M [State|mac]--state |--mac Example: iptables-a input-m State--state related-j ACCEPT Iptables-i input-m mac--mac-source aa:bb:cc:dd:ee:ff --state: Status of some packets INVALID established new --mac: Set rules based on MAC address ICMP packet rule: for response ping Usage:-m ICMP--icmp-type icmp-type corresponding to

=Noipv6_failure_fatal=Noipv6_addr_gen_mode=stable-Privacyname=Ens33uuid=9b4c784c-8910-4fb7-a1f4-5be34cc970f3device=Ens33onboot=yesipaddr=192.168.**.100PREFIX=24GATEWAY=192.168.**.2DNS=192.168.**.22. Restart the network adapter　　Service Network Restart3. See if the IP address is successfully modified in VMware virtual machineIP addr4. Setting up the Client connection extranetModify Files sudo vi/etc/resolv.confAdd DNS Address:NameServer 192.168. * *. 2iv. Modifying environment variablesTemporary

/log/httpd/access_log14, authorized CentOS users can run the FDISK command to complete Disk Management, and use MKFS or MKE2FS to achieve file system management;# Visudo Add the following line# CentOS All= (Root) nopasswd:/sbin/fdisk,/SBIN/MKE2FS,/SBIN/MKFS15, authorized Gentoo users can run the logical volume management of the relevant commands;# Gentoo all= (Root) LVM16, based on the pam_time.so module, restrict the user through the SSHD service remote login only during working hours;(1). # vi