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5.5 routing or masq problem...

Rob Salsgiver

5.5 routing or masq problem...
« on: October 25, 2002, 10:33:08 PM »
Sorry for the duplication - I posted this on the general forum then realized it may be more of an advanced problem.

Greetings all,  I have an interesting one that I would like some input on if any of you have run across it before.

I have a 5.5 private gateway sitting as the firewall on a 192.168.100.x
subnet, followed by (structurally):
    Cisco 25xx router (100.x subnet)
    Wireless router (between 100 and 111 subnets) PCs on both subnets.  

The PCs in the 100 subnet work great.
The PCs in the wireless 111 subnet can talk to everything on the 100 subnet,
and to the SME box via web/server manager and putty.

The PCs in the 111 subnet cannot access the 'net.  
When doing an NSLOOKUP, the PCs find the SME box and the first half-dozen or so queries timeout, then they will get an address for whatever is being queried.  Even after that, I cannot access a webpage through iexploiter.

Once the IP address is resolved, I CAN get POP3 E-mail  via outlook express,
but only if I put in the IP address of the SMTP host.  
I CANNOT get POP3 E-mail if I put in the hostname of the SMTP host.
I CANNOT retrieve a web page whether I can resolve the name or not.

I have disabled the firewall on the wireless router and made it a simple router.
Gateways are configured as such:
 Cisco 25xx router - gateway is the SME box local interface.
 100 subnet PCs - gateway is the Cisco 25xx
  Wireless router - gateway is the Cisco 25xx (also tried direct to SME local
if, no diff)
111 subnet PCs - gateway is the local wireless router IP  Any ideas, anyone?  

The 111 subnet IS entered as a local network on the SME box.

Cheers, Rob

Ron Reger

Re: 5.5 routing or masq problem...
« Reply #1 on: October 31, 2002, 03:03:49 AM »
Are your wireless routers Linksys?  I am having a similar problem except I have some Proxim Bridges as WAN links back to the SME Server/Firewall.  If I specify the SME server for Proxy, packets make it back to the source with no problem, however POP and SMTP bomb.  If  I do not use the SME as a proxy, packets are lost at the SME Server.  The subnet sitting directly behind the SME server are not haveing any problems at all.  I am wondering if ARP request are flakey on the Linksys routers.