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jxn
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Joined: 27 Aug 2004
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Location: south dakota
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 Posted: Fri Jul 08, 2005 8:41 pm Post subject: static IP = no internet. |
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Can someone please clue me into what I'm doing wrong? I'm trying to set up my server to use a static IP address issued by my ISP... I've changed the settings for netmask, broadcast, gateway, and IP address in /etc/conf.d/net, and commented out dhcp; but when I do this I no longer have "internet", ie I can't use emerge or a browser. Any idea what I could be doing wrong? /etc/resolv.conf dns settings are fine.
Thanks.
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msalerno
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Joined: 17 Dec 2002
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Location: Sweating in South Florida
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| Posted: Fri Jul 08, 2005 9:19 pm Post subject: |
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| Can you ping an internet IP address ? |
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jxn
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Joined: 27 Aug 2004
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Location: south dakota
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| Posted: Fri Jul 08, 2005 9:29 pm Post subject: |
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| msalerno wrote: | | Can you ping an internet IP address ? |
nope:
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DaveArb
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Location: Texas, USA
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| Posted: Fri Jul 08, 2005 9:44 pm Post subject: |
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That's trying to ping a name. Try pinging 68.142.197.73.
Dave |
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msalerno
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Joined: 17 Dec 2002
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Location: Sweating in South Florida
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| Posted: Fri Jul 08, 2005 9:44 pm Post subject: |
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That's not quite an IP address.
Try something like: 66.94.234.13 |
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dgaffuri
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Location: Italy
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| Posted: Fri Jul 08, 2005 9:50 pm Post subject: |
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| May you post ifconfig output, please? |
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msalerno
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Location: Sweating in South Florida
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| Posted: Fri Jul 08, 2005 9:52 pm Post subject: |
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As well as the output of
# netstat -nr |
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jxn
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Joined: 27 Aug 2004
Posts: 327
Location: south dakota
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| Posted: Fri Jul 08, 2005 10:08 pm Post subject: |
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here's the failed ping:
| Code: | # ping 68.142.197.73
connect: Network is unreachable |
Here's ifconfig:
| Code: |
# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0E:A6:C5:B2:74
inet addr:10.1.40.241 Bcast:10.1.40.241 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:115994 errors:0 dropped:0 overruns:0 frame:0
TX packets:20409 errors:0 dropped:0 overruns:0 carrier:0
collisions:112 txqueuelen:1000
RX bytes:41944729 (40.0 Mb) TX bytes:1771840 (1.6 Mb)
Interrupt:19 Base address:0xb400
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:896 errors:0 dropped:0 overruns:0 frame:0
TX packets:896 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:64125 (62.6 Kb) TX bytes:64125 (62.6 Kb)
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and here's netstat:
| Code: |
# netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.1.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 127.0.0.1 255.0.0.0 UG 0 0 0 lo
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dgaffuri
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Joined: 05 Jun 2005
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Location: Italy
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| Posted: Fri Jul 08, 2005 10:17 pm Post subject: |
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| Code: | | inet addr:10.1.40.241 |
That's not a public address. And you've no default gateway.
| Code: | # netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.1.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 127.0.0.1 255.0.0.0 UG 0 0 0 lo |
How are you connected to Internet, do you use a router or a modem? |
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jxn
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Joined: 27 Aug 2004
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Location: south dakota
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| Posted: Fri Jul 08, 2005 10:29 pm Post subject: |
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well, I suppose now is the point where I should let you know that I'm confounding two problems...
I'm on a campus network, setting up two different servers. One is a gentoo box and will be available only within the campus network (therefore, it's a 10.1.x.x address, not publicly accessable), and it is/was using dhcp before, but when I tried to switch the ip to a static ip address in /etc/conf.d/net, I realized that I could not use a browser/emerge/etc.
The second machine *will* be publicly available, but it's a fedora-core 4 box, and I'm having the exact same problem with it... if i try to set up a static IP, no net. So, I'm thinking it's the same problem...and since the fedora forums are worthless, I tried to get an answer here to see what I might have done wrong... but the info posted above is from the machine that will only be available on the local campus network.
make sense?
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dgaffuri
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Location: Italy
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| Posted: Fri Jul 08, 2005 10:36 pm Post subject: |
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| jxn wrote: | well, I suppose now is the point where I should let you know that I'm confounding two problems...
I'm on a campus network, setting up two different servers. One is a gentoo box and will be available only within the campus network (therefore, it's a 10.1.x.x address, not publicly accessable), and it is/was using dhcp before, but when I tried to switch the ip to a static ip address in /etc/conf.d/net, I realized that I could not use a browser/emerge/etc. |
If you don't set a gateway you'll never reach any host outside the 10.1 subnet. Which gateway (look with netstat -rn) does DHCP assigns you?
| jxn wrote: | | The second machine *will* be publicly available, but it's a fedora-core 4 box, and I'm having the exact same problem with it... if i try to set up a static IP, no net. So, I'm thinking it's the same problem...and since the fedora forums are worthless, I tried to get an answer here to see what I might have done wrong... but the info posted above is from the machine that will only be available on the local campus network. |
The question is still valid, how do you connect to the public network? |
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jxn
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Joined: 27 Aug 2004
Posts: 327
Location: south dakota
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| Posted: Sat Jul 09, 2005 1:32 am Post subject: |
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Here's the output from when I'm using dhcp on my gentoo (local-network-only) box:
| Code: | # netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.1.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 127.0.0.1 255.0.0.0 UG 0 0 0 lo
0.0.0.0 10.1.0.1 0.0.0.0 UG 0 0 0 eth0
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I connect to the network directly from my ethernet card... I don't have a router in between.
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jxn
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Joined: 27 Aug 2004
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Location: south dakota
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| Posted: Sat Jul 09, 2005 1:36 am Post subject: |
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hmm... those setting seem to have worked!
Here's what i've got now, and I broadcast http:// and can still access the internet.
| Quote: | iface_eth0="10.1.40.241 broadcast 10.1.40.241 netmask 255.255.0.0"
gateway="eth0/10.1.0.1" |
I'm going to try similar settings for my fedora machine; hopefully, I'll be back in business.
Is there a place for a good tutorial about this sort of thing? I've looked for man pages, tutorials, and I've re-read all the gentoo/other-distro networking guides and apparently I just didn't understand it.
Also, is there a security risk with sharing my actual IP address (ie, the 192.x.x.x version that I'll be using for the actual webserver)?
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jxn
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Location: south dakota
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| Posted: Sat Jul 09, 2005 1:50 am Post subject: |
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Also, on my *real* webserver, would I use that external IP (192.x.x.x) address as the gateway setting, or does it belong in the broadcast setting?
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DaveArb
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| Posted: Sat Jul 09, 2005 5:43 pm Post subject: |
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| jxn wrote: | | Also, is there a security risk with sharing my actual IP address (ie, the 192.x.x.x version that I'll be using for the actual webserver)? |
A publicly accessible webserver is always at risk. Whether by name (which is just a database entry for the IPA) or by address itself doesn't make any difference.
The gateway is the IP address of the next closer device to the Internet*. So, for a machine hooked to a router, it's the router's address. For the router, it's the ISP's router address. Your network people should give you the proper gateway IPs, if you don't already know them.
The broadcast addresses you have set up are funky. Broadcast is usually the first IPA of the network, i.e. on your 10.1.40.241/255.255.0.0, the broadcast would generally be 10.1.0.0.
Dave
* this is not applicable to complex networks, but for a simple network with a single, default gateway |
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