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Old 11-18-2004, 02:56 AM   #1
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Registered: Nov 2004
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WAN : unable to ping to WAN

Hello all,

I am working on a AP/Router with linux version 2.4.19.
Before goes into my problem detail, here are some setting on the router.

For the kernel :

Network Options
Packet Socket [yes]
Packet Socket: mmapped IO [yes]
Network Packet Filtering (replaces ipchains) [yes]
-> Network packet filtering debuggng [yes]
Socket Filtering [yes]
Unix Domain Sockets [yes]
TCP/IP Networking [yes]
-> IP: multicasting [yes]
----> IP: multicasting routing [yes]
-------->IP: PIM-SM version 1 support [yes]
-------->IP: PIM-SM version 2 support [yes]
-> IP: Advance Router [yes]
-> IP: Kernel level autoconfiguration [yes]
----> IP: DHCP support [yes]
----> IP: BOOTP support [yes]
----> IP: RARP support [yes]
-> IP: ARP daemon support [yes]
-> 802.1d Ethernet Bridging [yes]
IP: Netfilter Configuration [yes]
-> Connection tracking [yes]
----> FTP protocol support [yes]
----> IRC protocol support [yes]
-> IP table support [yes]
----> limit match support [yes]
----> netfilter MARK match support [yes]
----> Connection state match support [yes]
-> Packet filtering [yes]
----> REJECT target support [yes]
-> Full NAT [yes]
----> MASQUERADE target support [yes]
-> Packet mangling [yes]
----> MARK target support [yes]
-> LOG target support [yes]
ARP tables support [yes]
WAN router [yes]

For the network setup :
[1] Bridge both LAN and WLAN into BR0
[2] set the BR0 IP ( and up.
[3] set the WAN IP ( and up.
[5] echo 1 > /proc/sys/net/ipv4/ip_forward

[6] Set route table.
Destination Gateway Mask Flags If U ETH1 UG ETH1 U BR0 UG BR0

For the very first case:
1 router [R1], 2 PC [PC1 & PC2]

[PC1] IP: GW:
[PC1] Connected to [R1-WAN]

[PC2] IP: GW:
[PC2] Connected to [R1-LAN/BR0]

Ping [PC2] from [PC1] - Pass
Ping [PC1] from [PC2] - Pass
Case 1 - Pass

2 routers[R1 & R2], 1 PC [PC1]

[R1-LAN] IP:
[R1-LAN] Connected to [R2-WAN]

[PC1] IP: GW:
[PC1] Connected to [R2-LAN/BR0]

Ping [R1-LAN] from [PC1] - Fail
Ping [R2-WAN] from [PC1] - Pass
Case 2 - Fail

Same setting as CASE 2.
The route table is updated with additional routing...

Destination Gateway Mask Flags If U ETH1 UG ETH1 U BR0 UG BR0 UG ETH1

However, same result with CASE 2;
Ping [R1-LAN] from [PC1] - Fail
Ping [R2-WAN] from [PC1] - Pass
Case 3 - Fail

(1) Are there any setting wrong?
(2) Do we miss out any things?

Thanks in advance.


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