[ale] nslookup OK - No ping or access from proxy client

[Boris Borisov]

The old fashion way.

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE


echo 1 > /proc/sys/net/ipv4/ip_forward



 instead eth0 there is the name of your wifi device

.<bugyatl at gmail.com> wrote:

> When you say proxy server do you mean you running proxy software on it or
> you just using it as getaway?
>
> On Sat, Jun 10, 2023, 20:56 Don Thrash via Ale <ale at ale.org> wrote:
>
>> Hi Guys! My name is Don Thrash. I have been using Linux for quite a
>> while but the head isn't what it used to be. So I am looking for a
>> little help.  I am setting up a proxy server on the following machine.
>> I had it working a week ago.  Now I am totally confused.  The issue is
>> the proxy client does not get routed to the networks (local or
>> internet). Ping of google.com from the client returns the correct ip
>> address, but the ping returns timed out.  Typing in the ip returns timed
>> out.  The client is a Windows 10 box, I also tried my Ubuntu laptop with
>> the same result.
>>
>> Ubuntu 22.04.2 LTS (GNU/Linux 5.19.0-43-generic x86_64)
>>
>> wlx002522451a1f - WiFi from house to shed 192.168.1.0
>>
>> enp0s25 - Wired shed network - 10.42.0.0
>>
>> dont at Shed2:~$ route -n
>> Kernel IP routing table
>> Destination     Gateway         Genmask         Flags Metric Ref    Use
>> Iface
>> 0.0.0.0         192.168.1.1     0.0.0.0         UG    600 0        0
>> wlx002522451a1f
>> 10.42.0.0       0.0.0.0         255.255.255.0   U     100 0        0
>> enp0s25
>> 192.168.1.0     0.0.0.0         255.255.255.0   U     600 0        0
>> wlx002522451a1f
>>
>>   sudo iptables -L
>> [sudo] password for dont:
>> Chain INPUT (policy ACCEPT)
>> target     prot opt source               destination
>>
>> Chain FORWARD (policy ACCEPT)
>> target     prot opt source               destination
>>
>> Chain OUTPUT (policy ACCEPT)
>> target     prot opt source               destination
>>
>> Network connections from server work correctly.
>>
>>   ifconfig
>> enp0s25: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>>          inet 10.42.0.1  netmask 255.255.255.0  broadcast 10.42.0.255
>>          inet6 fe80::a88e:9d27:e490:8c8d  prefixlen 64  scopeid 0x20<link>
>>          ether 00:1e:4f:c7:0a:c0  txqueuelen 1000  (Ethernet)
>>          RX packets 26627  bytes 2224357 (2.2 MB)
>>          RX errors 0  dropped 0  overruns 0  frame 0
>>          TX packets 14280  bytes 9276316 (9.2 MB)
>>          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>>          device interrupt 21  memory 0xfebe0000-fec00000
>>
>> lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
>>          inet 127.0.0.1  netmask 255.0.0.0
>>          inet6 ::1  prefixlen 128  scopeid 0x10<host>
>>          loop  txqueuelen 1000  (Local Loopback)
>>          RX packets 10037  bytes 912910 (912.9 KB)
>>          RX errors 0  dropped 0  overruns 0  frame 0
>>          TX packets 10037  bytes 912910 (912.9 KB)
>>          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>>
>> wlx002522451a1f: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
>>          inet 192.168.1.164  netmask 255.255.255.0  broadcast
>> 192.168.1.255
>>          ether 00:25:22:45:1a:1f  txqueuelen 1000  (Ethernet)
>>          RX packets 235508  bytes 162967763 (162.9 MB)
>>          RX errors 0  dropped 6  overruns 0  frame 0
>>          TX packets 183068  bytes 31113448 (31.1 MB)
>>          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>>
>>
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>
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