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I am stumped by this issue. I have 2 separate Macs that cannot access pear.php.net at all by name or IP.
Here are the symptoms and steps that I took to try to resolve/narrow down this issue.
$ ping -c 4 pear.php.net
PING euk1.php.net (5.77.39.20): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
--- euk1.php.net ping statistics ---
4 packets transmitted, 0 packets received, 100.0% packet loss
$ ping -c 4 5.77.39.20
PING 5.77.39.20 (5.77.39.20): 56 data bytes
ping: sendto: No route to host
Request timeout for icmp_seq 0
ping: sendto: Host is down
Request timeout for icmp_seq 1
ping: sendto: Host is down
Request timeout for icmp_seq 2
--- 5.77.39.20 ping statistics ---
4 packets transmitted, 0 packets received, 100.0% packet loss
From a Windows PC on the same network (I even used the same ethernet cable just to be sure)
c:\>ping pear.php.net
Pinging euk1.php.net [5.77.39.20] with 32 bytes of data:
Reply from 5.77.39.20: bytes=32 time=102ms TTL=51
Reply from 5.77.39.20: bytes=32 time=102ms TTL=51
Reply from 5.77.39.20: bytes=32 time=100ms TTL=51
Reply from 5.77.39.20: bytes=32 time=102ms TTL=51
Ping statistics for 5.77.39.20:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 100ms, Maximum = 102ms, Average = 101ms
- Both machines are running OSX 10.7
- Tried both wired and wifi, same result
- Tried one of the Macs on a different network, same result
- Tried with firewall on and off, same result
- Have not had this problem with any other site / IP
- Tried to open both pear.php.net and 5.77.39.20 in a browser, got 404
Edit: In response to Paul's comment
$netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.0.1 UGSc 18 0 en1
5 link#8 UC 2 0 ham0
5.255.255.255 ff:ff:ff:ff:ff:ff UHLWbI 0 10 ham0
127 127.0.0.1 UCS 0 0 lo0
127.0.0.1 127.0.0.1 UH 3 152 lo0
169.254 link#5 UCS 0 0 en1
192.168.0 link#5 UCS 4 0 en1
192.168.0.1 0:1b:6c:69:19:8f UHLWIi 28 634 en1 1141
192.168.0.192 127.0.0.1 UHS 0 0 lo0
192.168.0.194 0:21:a0:50:4d:70 UHLWIi 0 498 en1 669
192.168.0.255 ff:ff:ff:ff:ff:ff UHLWbI 0 10 en1
Internet6:
Destination Gateway Flags Netif Expire
::1 link#1 UHL lo0
2620:9b::/96 link#8 UC ham0
2620:9c::5f7:6deb 7a:7c:5:f7:6d:eb UHL lo0
fe80::%lo0/64 fe80::1%lo0 UcI lo0
fe80::1%lo0 link#1 UHLI lo0
fe80::%en0/64 link#4 UCI en0
fe80::205:ff:fee1:a1a2%en0 0:5:0:e1:a1:a2 UHLWIi en0
fe80::%en1/64 link#5 UCI en1
fe80::1240:d3ff:feaf:8974%en1 10:40:d3:af:89:74 UHLI lo0
fe80::%ham0/64 link#8 UCI ham0
fe80::7879:5ff:fec7:6deb%ham0 7a:79:5:c7:6d:eb UHLI lo0
ff01::%lo0/32 fe80::1%lo0 UmCI lo0
ff01::%en0/32 link#4 UmCI en0
ff01::%en1/32 link#5 UmCI en1
ff01::%ham0/32 link#8 UmCI ham0
ff02::%lo0/32 fe80::1%lo0 UmCI lo0
ff02::%en0/32 link#4 UmCI en0
ff02::%en1/32 link#5 UmCI en1
ff02::%ham0/32 link#8 UmCI ham0
plz : The title must be IP 5.x.x.x access problem on OSX – Mike Castro Demaria – 2014-08-23T19:21:18.303
Mike You are probably correct, but I don't think I can change the title. – Peter Meth – 2014-08-24T04:47:33.747
Can you post a routing table from OSX? Hopefully
netstat -rn
– Paul – 2012-08-15T04:23:55.440@Paul I added it to the description above. – Peter Meth – 2012-08-15T13:57:53.107
You have a strange route for the 5.0.0.0/8 network there, which is likely to be the source of the problem. Can you disable hamachi and try again? – Paul – 2012-08-15T22:42:18.773
Wow, you're a genius. I uninstalled hamachi and things started working. – Peter Meth – 2012-08-16T02:24:04.510
Done - I have added some detail below to clarify why this is happening – Paul – 2012-08-16T04:31:43.033