I manage a KVM VPS at 104.143.14.103 that for some reason cannot reach http://pecl.php.net.
When I ping
the IP address of the PECL server (104.236.228.160), to make sure that it isn't a DNS problem, and each time I get Destination Host Unreachable
.
How can I debug whether the root cause is a misconfiguration of my server, or the ping being rejected by the destination server?
I have no issues ping
ing PECL from various other servers that I manage, so I know PECL isn't blocking all pings.
I also have no issues ping
ing any other sites I try from my VPS, the problem is solely with the PECL server.
I used the looking glass of my VPS host (http://lg.las1.ultravps.net/), and it has no issues pinging PECL. I also filed a support ticket with the host, and they logged into the hypervisor for this node and said they could successfully ping PECL.
I ran a traceroute
to the PECL server from another server to find the IP address of a next-to-last hop. I can successfully ping that IP (162.243.188.222) from my VPS.
When I run traceroute
from the VPS, I get:
[jeffwidman@ultravps ~]$ traceroute pecl.php.net
traceroute to pecl.php.net (104.236.228.160), 30 hops max, 60 byte packets
1 ultravps.jeffwidman.com (104.143.14.103) 3005.478 ms !H 3005.400 ms !H 3005.270 ms !H
[jeffwidman@ultravps ~]$ traceroute 104.236.228.160
traceroute to 104.236.228.160 (104.236.228.160), 30 hops max, 60 byte packets
1 ultravps.jeffwidman.com (104.143.14.103) 3005.916 ms !H 3005.877 ms !H 3005.867 ms !H
[jeffwidman@ultravps ~]$
I checked multiple blacklist sites, just to make sure I hadn't inherited a bad IP address... none of them listed my IP. I also don't regularly hit PECL, and this issue has occurred for several days, so I'd be very surprised if I was hitting rate-limiting.
What else can I do to debug whether PECL is blocking my IP address or if I have something misconfigured on my VPS?
Output of ip route
:
[jeffwidman@ultravps ~]$ ip route
default via 104.143.14.1 dev eth0 proto static metric 100
104.0.0.0/8 dev eth0 proto kernel scope link src 104.143.14.103 metric 100
Output of ip addr
:
[jeffwidman@ultravps ~]$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:16:3c:d1:49:f6 brd ff:ff:ff:ff:ff:ff
inet 104.143.14.103/8 brd 104.255.255.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::216:3cff:fed1:49f6/64 scope link
valid_lft forever preferred_lft forever
[jeffwidman@ultravps ~]$