Re: [PLUG] internet access problem
Thanks all for help.. I use Open DNS but i was unaware of google's DNS. i have replaced my DNS with google's DNS Regards, Dnyanraj ___ Pune GNU/Linux Users Group Mailing List
Re: [PLUG] internet access problem
On Wed, Jul 28, 2010 at 12:55 AM, Dnyanraj Mali dnyanraj.m...@gmail.com wrote: i can ping to other IP addresses, so connection is live, there must me some problem with ISP server, but i dont understand why skype is working none of the browsers were working.. This means some of the ports are blocked. and http port is blocked for sure.. Is it a bug? how to find that out? No. Problem is with DNS. If you give the IP address in the browser, it would work. So, when DNS servers are working, domain names will resolve and you will be able to browse. ___ Pune GNU/Linux Users Group Mailing List
Re: [PLUG] internet access problem
Probably your DNS servers had a problem. Did you try pinging some external IP address? You could try using publicly available DNS servers like Google DNS(8.8.8.8,8.8.4.4.), OpenDNS(208.67.222.222,208.67.220.220) or the ones in 4.2.2.1 to 4.2.2.6 series. i can ping to other IP addresses, so connection is live, there must me some problem with ISP server, but i dont understand why skype is working none of the browsers were working.. This means some of the ports are blocked. and http port is blocked fo mr sure.. Is it a bug? how to find that out? Right now things are working well automatically. Thanks all for your help. Skype has ip addresses of few of its servers hardcoded in it (besides lot of other hacks). I have traced its call stack and on failure of DNS resolution it will fall back to known ip addresses. It also has interesting ways of circumventing many of firewalls and punching holes into NATs. This is not a bug or issue in OS. Your ISP has given you a shity dns server (most of them do) Switching to google DNS or others as suggested in other replies will work well. BAIN ___ Pune GNU/Linux Users Group Mailing List
Re: [PLUG] internet access problem
On Mon, Jul 26, 2010 at 8:06 PM, Dnyanraj Mali dnyanraj.m...@gmail.comwrote: Hi All, I faced a weired problem today, i have tataindicom broadband connection. It was not pinging primary DNS 202.54.10.2, but still my skype account was working fine, but i was not able to access any site from any browser (i tried firefox, floc chrome). Also my terminal was not pinging the DNS. I have not installed any firewall any other application. I am using ubuntu 10.04, I checked my resolv.conf file to check if my DNS entries are correct, i did route -n which gives correct information, ifconfig also returns correct information. Has anyone else has faced the similar problem? Am i missing something? Try using OpenDNS IPs 208.67.222.222 and 208.67.220.220 in resolv.conf HTH. -- Thanks, Sagar Belure Security Analyst Secfence Technologies www.secfence.com ___ Pune GNU/Linux Users Group Mailing List
Re: [PLUG] internet access problem
On Tuesday 27 July 2010 00:29:02 Sagar Belure wrote: Try using OpenDNS IPs 208.67.222.222 and 208.67.220.220 in resolv.conf google dns 8.8.8.8 and 8.8.4.4 is another option. -- Regards Shridhar ___ Pune GNU/Linux Users Group Mailing List
Re: [PLUG] internet access problem
On Mon, Jul 26, 2010 at 8:06 PM, Dnyanraj Mali dnyanraj.m...@gmail.comwrote: Hi All, I faced a weired problem today, i have tataindicom broadband connection. It was not pinging primary DNS 202.54.10.2, but still my skype account was working fine, but i was not able to access any site from any browser (i tried firefox, floc chrome). Also my terminal was not pinging the DNS. I have not installed any firewall any other application. I am using ubuntu 10.04, I checked my resolv.conf file to check if my DNS entries are correct, i did route -n which gives correct information, ifconfig also returns correct information. Has anyone else has faced the similar problem? Am i missing something? Please help. Once a domain name is resolved, its record can be cached by the OS (or even by the app itself). Thus, the application(skype in this case) can keep working even if the DNS server is not reachable after that. Using netstat, check what connections skype has made and try to ping those sites by name and IP address. Both should work IMO. HTH. - P ___ Pune GNU/Linux Users Group Mailing List
Re: [PLUG] internet access problem
On Mon, Jul 26, 2010 at 8:06 PM, Dnyanraj Mali dnyanraj.m...@gmail.com wrote: It was not pinging primary DNS 202.54.10.2, but still my skype account was working fine, but i was not able to access any site from any browser (i tried firefox, floc chrome). Also my terminal was not pinging the DNS. I have not installed any firewall any other application. I am using ubuntu 10.04, I checked my resolv.conf file to check if my DNS entries are correct, i did route -n which gives correct information, ifconfig also returns correct information. Has anyone else has faced the similar problem? Am i missing something? Probably your DNS servers had a problem. Did you try pinging some external IP address? You could try using publicly available DNS servers like Google DNS(8.8.8.8,8.8.4.4.), OpenDNS(208.67.222.222,208.67.220.220) or the ones in 4.2.2.1 to 4.2.2.6 series. ___ Pune GNU/Linux Users Group Mailing List
Re: [PLUG] internet access problem
On Tue, Jul 27, 2010 at 12:29 AM, Sagar Belure sagar.bel...@gmail.comwrote: On Mon, Jul 26, 2010 at 8:06 PM, Dnyanraj Mali dnyanraj.m...@gmail.com wrote: Hi All, I faced a weired problem today, i have tataindicom broadband connection. It was not pinging primary DNS 202.54.10.2, but still my skype account was working fine, but i was not able to access any site from any browser (i tried firefox, floc chrome). Also my terminal was not pinging the DNS. I have not installed any firewall any other application. I am using ubuntu 10.04, I checked my resolv.conf file to check if my DNS entries are correct, i did route -n which gives correct information, ifconfig also returns correct information. Has anyone else has faced the similar problem? Am i missing something? Try using OpenDNS IPs 208.67.222.222 and 208.67.220.220 in resolv.conf HTH. -- Thanks, Sagar Belure Security Analyst Secfence Technologies www.secfence.com ___ Pune GNU/Linux Users Group Mailing List Hi Dnyanraj I am suggesting you to use following dns servers. These servers are google's public DNS servers 8.8.8.8 8.8.4.4 These servers are fast enough than any ISP's DNS server -- Amol Dalavi ___ Pune GNU/Linux Users Group Mailing List
Re: [PLUG] internet access problem
On Tue, Jul 27, 2010 at 1:12 PM, Mehul Ved mehul.n@gmail.com wrote: Probably your DNS servers had a problem. Did you try pinging some external IP address? You could try using publicly available DNS servers like Google DNS(8.8.8.8,8.8.4.4.), OpenDNS(208.67.222.222,208.67.220.220) or the ones in 4.2.2.1 to 4.2.2.6 series. i can ping to other IP addresses, so connection is live, there must me some problem with ISP server, but i dont understand why skype is working none of the browsers were working.. This means some of the ports are blocked. and http port is blocked for sure.. Is it a bug? how to find that out? Right now things are working well automatically. Thanks all for your help. ___ Pune GNU/Linux Users Group Mailing List Regards, Dnyanraj ___ Pune GNU/Linux Users Group Mailing List
[PLUG] internet access problem
Hi All, I faced a weired problem today, i have tataindicom broadband connection. It was not pinging primary DNS 202.54.10.2, but still my skype account was working fine, but i was not able to access any site from any browser (i tried firefox, floc chrome). Also my terminal was not pinging the DNS. I have not installed any firewall any other application. I am using ubuntu 10.04, I checked my resolv.conf file to check if my DNS entries are correct, i did route -n which gives correct information, ifconfig also returns correct information. Has anyone else has faced the similar problem? Am i missing something? Please help. Regards, Dnyanraj ___ Pune GNU/Linux Users Group Mailing List
