Soumen Dass soumen_dass@mtnl.net.in wrote: Pankaj Dekate wrote:
Same case here too.But when i used to ping other sites i used to get packet filtered.But i was able to access those sites. SOmtimes my thunderbird works with POP for gmail ,sometimes it doesn't .But SMTP always works inspite of getting "packet filtered."
Exactly. No problem surfing. No problem sending mails. Just that ping doesn't work. And so doesn't Gmail.
I guess the interpretation of "Packet filtered" is that some incoming packets were not allowed. Which means that if Gmail is sending something like some packets for confirmation etc., that is not getting responded so thunderbird hangs at "Connecting to pop.gmail.com..."
Wow, the ping is working again (may be till this session lasts):
########################################################### [/home/soumen] $ ping yahoo.com PING yahoo.com (216.109.112.135) 56(84) bytes of data. 64 bytes from w2.rc.vip.dcn.yahoo.com (216.109.112.135): icmp_seq=0 ttl=53 time=319 ms 64 bytes from w2.rc.vip.dcn.yahoo.com (216.109.112.135): icmp_seq=1 ttl=53 time=320 ms 64 bytes from w2.rc.vip.dcn.yahoo.com (216.109.112.135): icmp_seq=2 ttl=53 time=330 ms 64 bytes from w2.rc.vip.dcn.yahoo.com (216.109.112.135): icmp_seq=3 ttl=53 time=320 ms 64 bytes from w2.rc.vip.dcn.yahoo.com (216.109.112.135): icmp_seq=4 ttl=53 time=320 ms 64 bytes from w2.rc.vip.dcn.yahoo.com (216.109.112.135): icmp_seq=5 ttl=53 time=320 ms
--- yahoo.com ping statistics --- 6 packets transmitted, 6 received, 0% packet loss, time 5052ms rtt min/avg/max/mdev = 319.760/321.739/330.138/3.786 ms, pipe 2 [/home/soumen] $ ###########################################################
It's quite sad that we are paying MTNL for a service which doesn't even let us access our mails consistently :(
Many sites block the icmp packets for these may cause DOS(Denial of service). Also ping can be used as an effective tool to check the host system (if you actually sniff the packets you might get the information). I have noticed many ISP's have also started blocking ping and have got into content filtering,
For eg you cannot access explicit contents in UAE (be it porno or websites on hacking) even thru a DSL connection.
Best thing to know that the service you require is up or not is by doing a telnet on that port.
For eg if you want to know whether pop3 service is working then simply issue command
telnet "server IP/name" 110
If you get a response then things are fine.
If you find your connection consistently slow, then there could be something wrong with your last mile connection, Ensure that all the cables are properly punched into the system.
Regards,
Chirag
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