Linux can't connect to internet with DHCP through Linksys wired router
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Linux can't connect to internet with DHCP through Linksys wired router
Please help me on this. I have been using Linux for two years and I never came across this problem. It happened about 6 months ago when my family changed their Netgear router to a Linksys router. I have been trying to fix this problem since then. I have tried EVERYTHING!
There are 4 PCs connected, all with Windows except mine. All the windows pcs connect perfectly, except mine. So far I only got access to a Gentoo Live CD because I have just bought a brand new computer so I can't install any utilities. The problem is that my Linux dhcpcd detects everything correctly, but when I try to ping something like yahoo.com or google or msn.com it doesnt work. My router IP is 10.10.10.0 (or 1). My Linux detects everything but I cant connect. Here are outputs of some commands which may aid you in helping me:
I can successfully ping my router, broadcast ping my router, and I can even successfully ping all the nameservers. However, when trying to ping something else, even earthlink.net, it doesn't work. Please help me on this!
Hi ruslan40321, this is basic but it might work, I had a similar probelm when sharing my internet conection, now this is the question, can you ping the other computers in your network? like ping 192.168.0.3 or something like that? if you can that means that you are online, then make sure that you have lisa or rlisa running, and then try it, I know this is basic and maybe you tried it already, I just thought I would tell you in case you did not try it. I hope it works.
Originally posted by Jenny81 Hi ruslan40321, this is basic but it might work, I had a similar probelm when sharing my internet conection, now this is the question, can you ping the other computers in your network? like ping 192.168.0.3 or something like that? if you can that means that you are online, then make sure that you have lisa or rlisa running, and then try it, I know this is basic and maybe you tried it already, I just thought I would tell you in case you did not try it. I hope it works.
Well I know that I am online because I can ping the router and the nameservers... As for lisa,, I have read about it and I dont think I need it because I am not trying to build a network, I just need to connect to the internet (so i can at least install my system). Even if I wanted to, I couldnt try it because my live CD doesnt include lisa or rlisa. Thanks anyway though...
Originally posted by aznluvsmc Can you ping yahoo.com or google.com by IP address? Run nslookup and type server to see which nameserver is actually being queried.
I found out the IP address of yahoo on a windows machine and tried pinging it from Linux. It doesnt seem to work, however, it doesnt give me an uknown host error. It just sends packets and doesnt get them back. Packet loss: 100%. I dont have nslookup on the Live CD. Pinging server.earthlink.net didnt work either. Pinging the nameservers themselves however, does work.
Accessing outside world slow from latest version of M.Linux
I am almost facing a similar problem. I am up to date on Mandrake Linux distribution (using urpmi to
download all the latest packages and even the kernel rpms). For some reason, it takes a long
time to connect to any internet site. It takes almost about 4 or 5 minutes to refresh a web page
At home, I use a Airlink wireless router, which in turn connects to the cable modem. The IP I
get for my Linux desktop is a local one issued by the wireless router (with DHCP).
When I ping cnn.com or any other site, it resolves the name very quikclybut later
takes time to get packets from the site. Resolver is not the issue here. nslookup also
queries and gets the IP addresses fast. I used strace to find out where the bottleneck is
when ping is done. It opens a socket, sets options, uses send and when it calls
recvfrom or poll (on a fd), it times out. I have tried this with many other
sites. Ping to the rotuer's IP is fine.
I have dual-boot on my desktop and when I boot to Windows, it works great.
Any idea(s) on what can be done? I have already changed nsswitch.conf to
use only files and dns (for hosts).
[root@dyna ~]# ping -s 1450 188.8.131.52
PING 184.108.40.206 (220.127.116.11) 1450(1478) bytes of data.
1458 bytes from 18.104.22.168: icmp_seq=1 ttl=245 time=24.7 ms
1458 bytes from 22.214.171.124: icmp_seq=2 ttl=245 time=22.2 ms
1458 bytes from 126.96.36.199: icmp_seq=3 ttl=245 time=24.1 ms
1458 bytes from 188.8.131.52: icmp_seq=4 ttl=245 time=23.3 ms
I manually set the MTU for my NIC and the problem cleared
ifconfig eth0 mtu 1458
My download speeds are now ~ 1 Mbps.
I don't know how to set the MTU as part of the startup process but am sure some Linux gurus that can answer that piece.
For testing I would suggest sticking with the DNS servers that you have already pinged successfully. Many providers block pings to their servers.
Well, I had almost exactly the same problem, and managed to solve it.
The situation, much like yours, was that I had a linksys router (BEFSR41) that I couldn't connect to the internet through with gentoo. I dual-boot with XP, and XP could see the internet just fine; only gentoo was having a problem. The solution that worked for me was to emerge dhcpcd with USE=vfam. I believe that the same effect could be had by running dhcpcd -I, but I can't speak to that.
Anyway, I realize that you posted this well nigh-on three years ago, but hopefully someone will benefit from this post.