Client system can't access my linux box

Linux in General > Os Talk

(1/2) > >>

linuxgirl:
Can any body help me?
After i configured squid proxy server and NAT, my client system could not access my linux box.
I had this error message in my client system after setting the IP to that of the linux box and the browser hostname and port to 192.168.1.0 and 3128 respectively.

C:\>ipconfig

Windows IP Configuration

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 192.168.1.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.0

C:\>ping 192.168.1.0

Pinging 192.168.1.0 with 32 bytes of data:

Destination specified is invalid.
Destination specified is invalid.
Destination specified is invalid.
Destination specified is invalid.

C:\>nslookup
DNS request timed out.
timeout was 2 seconds.
*** Can't find server name for address 190.170.20.254: Timed out
DNS request timed out.
timeout was 2 seconds.
*** Can't find server name for address 192.115.72.170: Timed out
*** Default servers are not available
Default Server: UnKnown
Address: 190.170.20.254

Please help me troubleshoot this network problem

Ricky:

--- Quote ---Default Gateway . . . . . . . . . : 192.168.1.0
--- End quote ---

Well that is the mistake.. 192.168.1.0 is the address of network , not of any machine..

Please make sure that your Linux Box has what address.. it should be like 192.168.1.1, then set that as gateway.

linuxgirl:
Hello Ricky,
Thank you for your advice. I changed my gateway to 192.168.1.1 and the client system where able to ping the linux box.

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\

C:\>ipconfig

Windows IP Configuration

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 192.168.1.5
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1

C:\>ping 192.168.1.1

Pinging 192.168.1.1 with 32 bytes of data:

Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\>nslookup
DNS request timed out.
timeout was 2 seconds.
*** Can't find server name for address 190.170.20.254: Timed out
DNS request timed out.
timeout was 2 seconds.
*** Can't find server name for address 192.115.72.170: Timed out
*** Default servers are not available
Default Server: UnKnown
Address: 190.170.20.254

>

But the client were unable to browse. please advice me on what to do next.
Thanks.

Ricky:
well.. you give you structure of your network and also what you have done on which machine.. So that I can tell exact solution !

linuxgirl:
Thank you very much, I appreciate you concern.
I have a network of 15 systems, each running windowsXP. I planned to use one of my system for cache since my ISP do not have enough bandwidth. I have a system running windowsXP that is directly connected to the internet and from there to my linux box (Redhat 9.0) and to the other client.

WindowsXP ------------- Linux Box -------------- Client systems
-----ICS--------------------Squid/NAT

I have this configuration in my linux box

[root@girl root]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0A:E6:9B:85:FE
inet addr:192.168.0.20 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:833 errors:0 dropped:0 overruns:0 frame:0
TX packets:799 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:361420 (352.9 Kb) TX bytes:116198 (113.4 Kb)
Interrupt:11 Base address:0xd800

eth1 Link encap:Ethernet HWaddr 00:E0:50:02:30:92
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:4 dropped:0 overruns:0 carrier:8
collisions:0 txqueuelen:100
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:10 Base address:0xec00

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)

[root@girl root]#

In the client system I use 192.168.1.1 as the gateway and the IP address started from 192.168.1.2 to 192.168.1.14. The DNS remains the same as that of eth0.
in the internet explorer browser i specified girl as the hostname and 3128 as the port number. The client were able to ping the linux box but were unable to browse. I do not know wether it is the squid or NAT configuration that has problem.
Here is my NAT configuration
iptables=/sbin/iptables

iptables --flush -t nat

iptables --table nat --append POSTROUTING --out-interface ppp0 -j MASQUERADE
iptables --append FORWARD --in-interface eth0 -j ACCEPT
echo 1 > /proc/sys/net/ipv4/ip_forward

#Transparent proxy
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128

I made it executable with "chmod 755 /etc/rc.d/rc.nat" and also place "etc/rc.d/rc.nat" in the etc/rc.d/rc.local to enable automatic execution at startup as you specified in
http://www.linuxsolved.com/forums/ftopic115.html

Here is my SQUID CONFIGURATION
http_port 3128
cache_mem 60 MB
cache_dir ufs /var/spool/squid 1000 16 256
pid_filename /var/run/squid.pid
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443 563
acl Safe_ports port 80      # http
acl Safe_ports port 21      # ftp
acl Safe_ports port 443 563   # https, snews
acl Safe_ports port 70      # gopher
acl Safe_ports port 210      # wais
acl Safe_ports port 1025-65535   # unregistered ports
acl Safe_ports port 280      # http-mgmt
acl Safe_ports port 488      # gss-http
acl Safe_ports port 591      # filemaker
acl Safe_ports port 777      # multiling http
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost
http_access deny all
visible_hostname admin.girl.com
httpd_accel_port 80
httpd_accel_single_host on
httpd_accel_with_proxy on
httpd_accel_uses_host_header on
error_directory /usr/share/squid/errors/English

Please help me out.

Navigation

[0] Message Index

[#] Next page

Go to full version