[lwip-users] Re: help required for LWIP

[Kelvin Lawson]

Dinesh,

> I was referring to some of the problems in the lwip mailing list
> archives where I found your answers to some queries. I needed some
> help coz even i am stuck. I am using RedHat 9.0.  I was trying to
> implement a simple server and client program. where a client sends
> some data to the server and the server simply prints the data. When i
> tried to trace the program found out that the client cannot connect to
> the server and stops after a number of retries. The client that is the
> netconn_connect function returns -3 as an error. client is not being
> able to send a SYN packet which means no packet is being sent to the
> server. I think even u had a similar problem. I tried running the
> simhost example and found that the tap interface is configured
> properly. When i ping the IP 192.168.0.2 <http://192.168.0.2> it works
> fine but i cannot use HTTP of > simhost. Please help.

In the message you refer to, I suggested checking the firewall 
configuration. This may be running on the tap interface and blocking 
connections to the HTTP server.

Kelvin.