On 5 September 2013 09:04, Yousong Zhou <[email protected]> wrote: > Hi, Jon. > > On 5 September 2013 04:02, [email protected] <[email protected]> wrote: >> I'm using OpenWRT git on AsiaRF. AsiaRF may not be completely debugged yet. >> >> Problem: I can ping the router without issue. But I am unable to open >> any TCP connections. >> Firewall is off: /etc/init.d/firewall stop >> >> I attached a pcap of trying to open port 80 over Ethernet >> >> Desktop sends a SYN >> Router responds with SYN/ACK >> But then desktop doesn't go any further. Normally it would send an ACK. >> So the desktop doesn't like the response from the router, but what is >> wrong with it? > > I loaded the .pcap file into wireshark, and it said the TCP checksum > was incorrect, including all [SYN] and the [SYN,ACK] packets.
Is there a "TCP checksum offload" function for your NIC card? Wireshark suggests that it might be caused by that. > >> >> Hardware seems fine. I can ping forever and update the the flash with >> tftp. I tried two different boards. >> >> -- >> Jon Smirl >> [email protected] >> >> _______________________________________________ >> openwrt-devel mailing list >> [email protected] >> https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel >> _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
