I'll try the tcpdump shortly. I can log into the server through my wireless provider Also note that if I ping the ip address, I get the same results.
-- Jerry Feldman <gaf.li...@gmail.com> Boston Linux and Unix http://www.blu.org PGP key id: 6F6BB6E7 PGP Key fingerprint: 0EDC 2FF5 53A6 8EED 84D1 3050 5715 B88D 6F6 B B6E7 On Tue, May 19, 2020, 9:42 AM Chuck Anderson <c...@wpi.edu> wrote: > On Tue, May 19, 2020 at 09:01:12AM -0400, Jerry Feldman wrote: > > I have Xfinity internet at home. In the past few weeks I can't access > > blu.org. Ping and website times out from phone over wifi and desktop > fedora > > 32 connected by cable to the gateway. If I turn wifo off on my phone I am > > able to ping, sdh, and get web site from my wireless carrier. It seems to > > be related to my Wan address since other Comcast users can access Blu. > John > > and I have checked our server and nothing appears to be blocking my Wan > > address. One interacting anomaly is that when I reset the gateway I am > able > > to access the site for a short period of time, such as 10 mins. I've been > > on chats and phone calls with Xfinity, but they can't find any issues. I > am > > able to access all other web sites and can ping other hosts. It is only > > blu.org that is the problem. > > > > Since it appears to only be my home that is affected, I don't think > Comcast > > is blacklisting Blu. I don't have any evidence that the BLU server is > > blocking my ip address. > > > > Looking for ideas > > Since it is possible to coordinte both ends in this instance, can you > try running tcpdump or wireshark on your end, while someone runs > tcpdump on the blu.org server, and see where the conversation is being > lost or getting stuck? Use the IP of blu.org and your router's public > IP to filter the tcpdumps like this (substitute the correct names of > the network intefaces): > > client> sudo tcpdump -i <interface> -nnn -s0 -vvv -w clientside.pcap host > 216.235.254.230 > > server> sudo tcpdump -i <interface> -nnn -s0 -vvv -w serverside.pcap host > <your-router-public-ip> > > Then do a ping: > > >ping 216.235.254.230 > PING 216.235.254.230 (216.235.254.230) 56(84) bytes of data. > 64 bytes from 216.235.254.230: icmp_seq=1 ttl=59 time=14.8 ms > 64 bytes from 216.235.254.230: icmp_seq=2 ttl=59 time=13.2 ms > 64 bytes from 216.235.254.230: icmp_seq=3 ttl=59 time=169 ms > ^C > --- 216.235.254.230 ping statistics --- > 3 packets transmitted, 3 received, 0% packet loss, time 2003ms > rtt min/avg/max/mdev = 13.247/65.789/169.346/73.228 ms > > Then do a telnet to port 80 test. If it connects, type "HEAD / HTTP/1.0" > and hit enter twice: > > >telnet 216.235.254.230 80 > Trying 216.235.254.230... > Connected to 216.235.254.230. > Escape character is '^]'. > HEAD / HTTP/1.0 > > HTTP/1.1 200 OK > Date: Tue, 19 May 2020 13:32:54 GMT > Server: Apache > X-Powered-By: PHP/5.4.16 > Connection: close > Content-Type: text/html; charset=UTF-8 > > Connection closed by foreign host. > > You can send the pcaps along to the list (or me privately if you wish). > _______________________________________________ > Discuss mailing list > Discuss@lists.blu.org > http://lists.blu.org/mailman/listinfo/discuss > _______________________________________________ Discuss mailing list Discuss@lists.blu.org http://lists.blu.org/mailman/listinfo/discuss
