Can't bind to localhost after 10.04 upgrade (cherokee, php-cgi)

**PPvG** · May 17th, 2010

Hello everyone,

After upgrading Ubuntu, I'm having trouble with the cherokee (1.0.0) and php-cgi.

Cherokee itself runs fine. When I run cherokee-admin, I get this error:
(critical) bind.c:284 - Could not bind() port=9090 (UID=0, GID=0)

According to netstat port 9090 is absolutely free (both IPv4 and IPv6). When I run cherokee-admin -b or cherokee-admin -b0.0.0.0 it will succesfully bind to :::9090 (IPv6) or 0.0.0.0:9090 (IPv4) respectively. I can then reach cherokee-admin via the public interface, but not via localhost (over an SSH tunnel). When I call cherokee-admin with -blocalhost or -b127.0.0.1 I get the same "Could not bind" error.

The same seems to happen with php-cgi. When I run /usr/bin/php-cgi -b 127.0.0.1:47990, I get this error:
Cannot bind/listen socket - [99] Cannot assign requested address.
Couldn't create FastCGI listen socket on port 127.0.0.1:47990

When I change 127.0.0.1 to localhost, I get this:
Host 'localhost' has multiple addresses. You must choose one explicitly!

I've tried disabling IPv6 and completely removing (with --purge) and reinstalling cherokee and all associated packages and libraries, but this didn't help either.

The problem started when I upgraded from Ubuntu 8.10 (via 9.04 and 9.10) to 10.04. It's a VPS with kernel 2.6.32.9 (domU, modified kernel for virtualization). Before the upgrade everything worked like a charm. I tried a 'fresh' install in a virtual machine on my local machine and everything works perfectly.

I'd rather not have to reinstall the complete server. Does anyone know what's going on?

**PPvG** · May 17th, 2010

Anyone? Do I really have to completely reinstall the server for this tiny little problem?

**Xipher** · May 18th, 2010

would you do a "ip addr show" and paste the output, thanks.

**PPvG** · May 18th, 2010

Thank you for replying.

ip addr show:

Code:

1: lo: <LOOPBACK> mtu 16436 qdisc noop state DOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether x:x:x:11:32:35 brd ff:ff:ff:ff:ff:ff
    inet x.x.97.103/24 brd x.x.97.255 scope global eth0
    inet6 x::x:x:fe11:3235/64 scope link
       valid_lft forever preferred_lft forever
3: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN
    link/ether x:x:x:16:69:70 brd ff:ff:ff:ff:ff:ff
4: tunl0: <NOARP> mtu 1480 qdisc noop state DOWN
    link/ipip 0.0.0.0 brd 0.0.0.0
5: gre0: <NOARP> mtu 1476 qdisc noop state DOWN
    link/gre 0.0.0.0 brd 0.0.0.0

**PPvG** · May 18th, 2010

I finally found out what was wrong! In /etc/network/interfaces, I had this:

Code:

auto lo
iface lo inet loopback
pre-up iptables-restore < /etc/iptables.up.rules
        address 127.0.0.1
        netmask 255.0.0.0

The iptables-restore script causes an error, preventing the interface from going up. Commenting out the third line and running sudo ifup lo fixed the problem!