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Old 10th June 2007, 10:02 PM
jolephoto Offline
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Join Date: Jun 2007
Posts: 6
Outbound port 80 requests being send internally

I'm having a really weird issue with my server (FC6)

Whenever I try to make a request outbound on port 80 to an external server, I get re-routed to myself, and it returns index.html of my own server. What's even odder is that wget report the correct IP address and everything, but sure enough the page it just got was my own homepage.

It's not the router/gateway, as it works fine on a different machine behind the same gateway, and it doesn't apply to other ports. (eg. I can ssh to another host on port 22 or otherwise)

Here's what the wget looks like

# wget google.com
--14:57:53-- http://google.com/
Resolving google.com...,,
Connecting to google.com||:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 3080 (3.0K) [text/html]
Saving to: `index.html.2'

100%[================================================== ================================================== ===================================>] 3,080 --.-K/s in 0s

14:57:53 (59.0 MB/s) - `index.html.2' saved [3080/3080]

Clearly it isn't being downloaded at 59MB/s, but it's getting it's own server's page.

I'm using lighttpd.

Here are the if's on the server.

eth0 Link encap:Ethernet HWaddr 00:10:A7:1A:4F:E0
inet addr: Bcast: Mask:
inet6 addr: fe80::210:a7ff:fe1a:4fe0/64 Scope:Link
RX packets:2394756 errors:1 dropped:0 overruns:0 frame:1
TX packets:2489580 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1320301877 (1.2 GiB) TX bytes:1542817631 (1.4 GiB)
Interrupt:169 Base address:0x6c00

lo Link encap:Local Loopback
inet addr: Mask:
inet6 addr: ::1/128 Scope:Host
RX packets:28159 errors:0 dropped:0 overruns:0 frame:0
TX packets:28159 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:10132392 (9.6 MiB) TX bytes:10132392 (9.6 MiB)

Please help
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Old 11th June 2007, 05:22 PM
fancylad's Avatar
fancylad Offline
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Join Date: Nov 2006
Location: Hamilton, Ontario
Posts: 33
Hmmm...very interesting problem. I was hoping that somone else would reply as I am very curious as to the reason for this. Are you using some kind of firewall on your server? Perhaps you have a rule that directs all outbound traffic destined for port 80 to either your eth0 or lo interfaces? I'm just taking a stab at this. Have you tried stopping your web server and then trying it? Perhaps there is some kind of configuration change for lighttpd that can help? Good luck.
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Old 11th June 2007, 08:42 PM
jolephoto Offline
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Join Date: Jun 2007
Posts: 6
I am not using a Firewall on the server, and I have restarted lighttpd numerous times. Like I said, I don't think it's the external firewall because other machines seem to work fine.

I suspect there's some sort of problem with the lo adapter, does anyone know of any issues related to that? I guess I can always try the ol' reboot but I have 80 days of uptime already
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Old 19th June 2007, 08:34 AM
jolephoto Offline
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Join Date: Jun 2007
Posts: 6
Sorry guys, I guess my friend had done a bit of mis-diagnosing, it appears it was the router after all. The issue has been resolved.
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internally, outbound, port, requests, send

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