assigning multiple ip addresses to NIC on bootupm, how?
Chris Lowth
chris at lowth.com
Mon Jul 11 08:08:16 UTC 2005
Jeff Vian wrote:
>>Or simply add the commands to /etc/rc.local
>>
>>
>
>That will not work for his needs. rc.local is the last script run and
>he needs the interfaces active before httpd starts.
>
>
>
Yes: it will work - it's exactly what I do on my servers.
And .. No, he doesnt need the logical interfaces active before httpd runs
Given that the OP currently works by running the commands in an
interactive shell after bootup and makes no comment about having to
restart Apache, this suggests that he is not using IP addresses in his
"Listen" options in httpd.conf - which means that Apache is listening on
IP 0.0.0.0 ("all") which in turn means that adding IPs to interfaces
after the event will indeed work just fine. The "interfaces must be
active" point is only an issue if Apache is bound to specific IPs via
the "Listen" statement - and it appears that this is not the case for
the OP.
It's easy to check.. if "netstat -nta" shows no specific IP address
against the "LISTEN" entry for port 80, then the rc.local route will
work fine - whether it's "best practice" is another matter.
Here's the trace of an actual test...
[root at tregonwell root]# ifconfig
eth0 Link encap:Ethernet HWaddr << CUT >>
inet addr:192.168.0.14 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:148 errors:0 dropped:0 overruns:0 frame:0
TX packets:180 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:14384 (14.0 Kb) TX bytes:46289 (45.2 Kb)
Interrupt:3
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)
[root at tregonwell root]# netstat -nta | grep :80 | grep LISTEN
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
tcp 0 0 :::80 :::* LISTEN
[root at tregonwell root]# ifconfig eth0:1 192.168.0.140
[root at tregonwell root]# telnet 192.168.0.140 80
Trying 192.168.0.140...
Connected to 192.168.0.140.
Escape character is '^]'.
GET /XXXXXX HTTP/1.0
HTTP/1.1 404 Not Found
------ cut -----
Chris
--
http://www.lowth.com/rope - iptables match module scripting
language for controlling P2P and other high-level protocols.
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