Network Troublshooting > Linux Proxy Server Support
proxy problem
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mervs00024:
hi everyone i am new to linux can you please help on my problem my situation is this:
i installed centos 5.2final to use it as a dhcp/proxy server
on my eth1 my ip address is 193.9.200.11 which is forward to external ip
then my my eth0 configure as 192.168.1.1
here is my config of dhcpd.conf:
ddns-update-style none; # keep it simple for now
ignore client-updates; # here too
DHCPARGS=eth0; # tells it what interface to listen on
subnet 192.168.1.0 netmask 255.255.255.0 {
# --- default gateway
option routers 192.168.1.1; # gateway on your eth1 internal interface
option subnet-mask 255.255.255.0; # subnet mask
option domain-name "example.com"; # domain name given to client
option domain-name-servers 193.9.200.11; # the IP of your ISP's nameservers you're using
option time-offset -18000; # Eastern Standard Time - set to what you have
range 192.168.1.10 192.168.1.100; # the range of IP's your clients will get
default-lease-time 21600; # how long the client's will keep the same IP
max-lease-time 43200;
}
==============================
then i edit my /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.1.1
NETMASK=255.255.255.0
GATEWAY=193.9.200.11
the client can get an ip from my centos but it cannot go to internet.with the ip of 192.168.1.100
did i miss something on my config in dhcpd.conf?
my centos can go to internet but the client connected to eth0 cannot.
please help...
thanks in advance
kaushalpatel1982:
1. You need not require to configure gateway in /etc/sysconfig/network-scripts/ifcfg-eth0.
2. You have to enable IP Forwarding in /etc/sysctl.conf by changing line to "net.ipv4.ip_forward = 1"
3. You have to enable masquerading on your CentOS box to foword your internal traffic to WAN using following command.
# iptables -t nat -A POSTROUTING -s eth0 -d eth1 -j MASQUERADE
4. You have not mentioned the configuration of your proxy server that are you using transparent proxy or browser proxy. I believe you have configured proxy setting in browser of your clients.
I hope these will solve your problem. Best of Luck.
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