[PHP] alias address in REMOTE_ADDR
Hi Everyone, I've run into a curious problem, not even really sure it's PHP, but that's where I caught it, so here it is: I have two servers hanging on the net, without proxies. Let's call them Server1 and Server2. Server1 has multiple IP addresses, configured as aliases. My problem: When I do a wget --spider from 1 to 2, I get the eth0 (not alias) address in Apache's accesslog on Server2. But when I do a file_get_contents(http://server2.tld), and observe the $_SERVER['REMOTE_ADDR'] on Server2, I get one of the alias IP addresses back. What can cause this? I really need the eth0 IP address back in REMOTE_ADDR. Regards, Csaba -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] alias address in REMOTE_ADDR
On Saturday, May 12, 2012, Tóth Csaba wrote: Hi Everyone, I've run into a curious problem, not even really sure it's PHP, but that's where I caught it, so here it is: I have two servers hanging on the net, without proxies. Let's call them Server1 and Server2. Server1 has multiple IP addresses, configured as aliases. My problem: When I do a wget --spider from 1 to 2, I get the eth0 (not alias) address in Apache's accesslog on Server2. But when I do a file_get_contents( http://server2.tld), and observe the $_SERVER['REMOTE_ADDR'] on Server2, I get one of the alias IP addresses back. What can cause this? I really need the eth0 IP address back in REMOTE_ADDR. On server2 make sure the metric of both interface in the routing table is not same. Same metric can cause this behavior. Change the metric of eth0 to a lower value than the other. Then try again. Regards, Csaba -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- Shiplu.Mokadd.im ImgSign.com | A dynamic signature machine Innovation distinguishes between follower and leader
Re: [PHP] alias address in REMOTE_ADDR
On Saturday, May 12, 2012, shiplu wrote: On Saturday, May 12, 2012, Tóth Csaba wrote: Hi Everyone, I've run into a curious problem, not even really sure it's PHP, but that's where I caught it, so here it is: I have two servers hanging on the net, without proxies. Let's call them Server1 and Server2. Server1 has multiple IP addresses, configured as aliases. My problem: When I do a wget --spider from 1 to 2, I get the eth0 (not alias) address in Apache's accesslog on Server2. But when I do a file_get_contents( http://server2.tld), and observe the $_SERVER['REMOTE_ADDR'] on Server2, I get one of the alias IP addresses back. What can cause this? I really need the eth0 IP address back in REMOTE_ADDR. On server2 make sure the metric of both interface in the routing table is not same. Same metric can cause this behavior. Change the metric of eth0 to a lower value than the other. Then try again. Correction. On server2 should be On server1. -- Shiplu.Mokadd.im ImgSign.com | A dynamic signature machine Innovation distinguishes between follower and leader
Re: [PHP] alias address in REMOTE_ADDR
On 5/11/2012 10:57 PM, Tóth Csaba wrote: Hi Everyone, I've run into a curious problem, not even really sure it's PHP, but that's where I caught it, so here it is: I have two servers hanging on the net, without proxies. Let's call them Server1 and Server2. Server1 has multiple IP addresses, configured as aliases. My problem: When I do a wget --spider from 1 to 2, I get the eth0 (not alias) address in Apache's accesslog on Server2. But when I do a file_get_contents(http://server2.tld), and observe the $_SERVER['REMOTE_ADDR'] on Server2, I get one of the alias IP addresses back. What can cause this? I really need the eth0 IP address back in REMOTE_ADDR. Regards, Csaba What IP address is your Apache bound to? You eth0 or one of the alias IPs? Jim -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] SOLVED: [PHP] alias address in REMOTE_ADDR
Hi, shiplu and Jim, many thanks for the hints, I solved it; wasn't related to PHP, but I will write it down so if others search for this problem, at least they will have one solution that worked. Jim: the Apache was configured to listen on all interfaces - I had to, because I have multiple SSL-enabled hosts with different keys shiplu: it was the metric! Only problem, because these are alias interfaces, a simple ifmetric doesn't cut it: #~ ifmetric eth0:1 20 SIOCSIFMETRIC: operation not supported So I had to disable the alias interfaces with ifconfig down, the re-enable them; after that, add the gateways like this: #~ route add default gw GATEWAYIP metric 10 so now my routing table has a metric 0 gateway for eth0, and a metric 10 for both aliases. Many thanks again, and have a nice weekend! Regards, Csaba On Fri, 11 May 2012 23:54:56 -0700, Jim Lucas wrote: On 5/11/2012 10:57 PM, Tóth Csaba wrote: Hi Everyone, I've run into a curious problem, not even really sure it's PHP, but that's where I caught it, so here it is: ... Regards, Csaba What IP address is your Apache bound to? You eth0 or one of the alias IPs? Jim -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] alias address in REMOTE_ADDR
On May 12, 2012, at 2:54, Jim Lucas li...@cmsws.com wrote: On 5/11/2012 10:57 PM, Tóth Csaba wrote: Hi Everyone, I've run into a curious problem, not even really sure it's PHP, but that's where I caught it, so here it is: I have two servers hanging on the net, without proxies. Let's call them Server1 and Server2. Server1 has multiple IP addresses, configured as aliases. My problem: When I do a wget --spider from 1 to 2, I get the eth0 (not alias) address in Apache's accesslog on Server2. But when I do a file_get_contents(http://server2.tld), and observe the $_SERVER['REMOTE_ADDR'] on Server2, I get one of the alias IP addresses back. What can cause this? I really need the eth0 IP address back in REMOTE_ADDR. Regards, Csaba What IP address is your Apache bound to? You eth0 or one of the alias IPs? Jim -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php Do a netstat -ab and see what ip/ports apache is listening on. Mike Mackintosh ZCE PHP5.3 www.highonphp.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
