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I am a new Arch user. I started using Arch just a few days ago. Need your help to forward traffic to the Wireless access point I created on arch. i am using cable internet (ppp0) which I want to share via a usb wifi adapter running as a WAP. I followed the instructions in this link to enable the AP mode. Afterwards I followed the instructions provided in the Arch Wiki to forward the traffic but because of my inexperience I am still unable to connect to the internet. Here is the output of iptables -nvL :
Chain INPUT (policy DROP 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
77 31312 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0
0 0 DROP all -- * * 0.0.0.0/0 0.0.0.0/0 state INVALID
3338 1639K ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
16 960 ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 8 state NEW
394 51023 OPEN-UDP udp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW
6 300 OPEN-TCP tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp flags:0x17/0x02 state NEW
394 51023 REJECT udp -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable
6 300 REJECT tcp -- * * 0.0.0.0/0 0.0.0.0/0 reject-with tcp-reset
32 896 REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-proto-unreachable
Chain FORWARD (policy DROP 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 TCPMSS tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp flags:0x17/0x02 TCPMSS clamp to PMTU
0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
112 6832 fw-interfaces all -- * * 0.0.0.0/0 0.0.0.0/0
0 0 fw-open all -- * * 0.0.0.0/0 0.0.0.0/0
0 0 REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-unreachable
Chain OUTPUT (policy ACCEPT 4010 packets, 595K bytes)
pkts bytes target prot opt in out source destination
Chain OPEN-TCP (1 references)
pkts bytes target prot opt in out source destination
Chain OPEN-UDP (1 references)
pkts bytes target prot opt in out source destination
Chain fw-interfaces (1 references)
pkts bytes target prot opt in out source destination
112 6832 ACCEPT all -- eth0 * 0.0.0.0/0 0.0.0.0/0
Chain fw-open (1 references)
pkts bytes target prot opt in out source destination and iptables -t nat -nvL :
Chain PREROUTING (policy ACCEPT 1436 packets, 113K bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 545 packets, 35046 bytes)
pkts bytes target prot opt in out source destination
Chain POSTROUTING (policy ACCEPT 552 packets, 35347 bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * ppp0 10.254.239.0/27 0.0.0.0/0
0 0 MASQUERADE all -- * eth0 10.254.239.0/27 0.0.0.0/0
0 0 MASQUERADE all -- * wlan0 10.254.239.0/27 0.0.0.0/0 output of ifconfig :
eth0 Link encap:Ethernet HWaddr 00:25:11:22:07:EF
inet6 addr: fe80::225:11ff:fe22:7ef/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:65439 errors:0 dropped:0 overruns:0 frame:0
TX packets:4662 errors:0 dropped:0 overruns:0 carrier:2
collisions:0 txqueuelen:1000
RX bytes:6148377 (5.8 Mb) TX bytes:742809 (725.3 Kb)
Interrupt:25
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:77 errors:0 dropped:0 overruns:0 frame:0
TX packets:77 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:31312 (30.5 Kb) TX bytes:31312 (30.5 Kb)
mon.wlan0 Link encap:UNSPEC HWaddr D8-5D-4C-8C-12-5B-00-00-00-00-00-00-00-00-00-00
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
ppp0 Link encap:Point-to-Point Protocol
inet addr:180.92.149.249 P-t-P:1.1.1.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:2046 errors:0 dropped:0 overruns:0 frame:0
TX packets:2173 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:1036816 (1012.5 Kb) TX bytes:359238 (350.8 Kb)
wlan0 Link encap:Ethernet HWaddr D8:5D:4C:8C:12:5B
inet addr:10.254.239.1 Bcast:10.255.255.255 Mask:255.0.0.0
inet6 addr: fe80::da5d:4cff:fe8c:125b/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:1064 (1.0 Kb)here is what I am trying to achieve :
(user name and pass required for high speed internet ppp0)
(ISP) <------------------------------------------------------------------------------------> My Desktop PC
(eth0) |
USB Wifi (WAP)
|
----------------------|----------------------------------
| |
( laptop with win 7) (laptop with win xp)Sorry for the mistakes. It's my first post.
Last edited by ubuntu83 (2010-08-09 19:28:22)
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bump first post updated with more info.
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you need to forward data from your wlan0 interface to the ppp0 interface, so add a rule to fw-interfaces
iptables -A fw-interfaces -i wlan0 -o ppp0 -j ACCEPT
since eth0 is only used for ppp connection, no data is forwarded for eth0, so you should only set an input/output policy for eth0.
in the postrouting rules for the nat table, delete all the rules present and add this rule
iptables -t nat -A POSTROUTING -s 10.254.239.0/27 -o ppp0 -j MASQUERADE
mnake sure that ppp0 is set as your default route and your dns settings are working correctly.
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Thanks with your help it's running perfectly.
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