Why can't I route to some sites from my MacBook Pro that I can see from my iPad?
- by Robert Atkins
I am on M1 Cable (residential) broadband in Singapore.
I have an intermittent problem routing to some sites from my MacBook Pro—often Google-related sites (arduino.googlecode.com and ajax.googleapis.com right now, but sometimes even gmail.com.) This prevents StackExchange chat from working, for instance. Funny thing is, my iPad can route to those sites and they're on the same wireless network! I can ping the sites, but not traceroute to them which I find odd.
That I can get through via the iPad implies the problem is with the MBP. In any case, calling M1 support is... not helpful.
I get the same behaviour when I bypass the Airport Express entirely and plug the MBP directly into the cable modem. Can anybody explain a) how this is even possible and b) how to fix it?
mella:~ ratkins$ ping ajax.googleapis.com
PING googleapis.l.google.com (209.85.132.95): 56 data bytes
64 bytes from 209.85.132.95: icmp_seq=0 ttl=50 time=11.488 ms
64 bytes from 209.85.132.95: icmp_seq=1 ttl=53 time=13.012 ms
64 bytes from 209.85.132.95: icmp_seq=2 ttl=53 time=13.048 ms
^C
--- googleapis.l.google.com ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 11.488/12.516/13.048/0.727 ms
mella:~ ratkins$ traceroute ajax.googleapis.com
traceroute to googleapis.l.google.com (209.85.132.95), 64 hops max, 52 byte packets
traceroute: sendto: No route to host
1 traceroute: wrote googleapis.l.google.com 52 chars, ret=-1
*traceroute: sendto: No route to host
traceroute: wrote googleapis.l.google.com 52 chars, ret=-1
^C
mella:~ ratkins$
The traceroute from the iPad goes (and I'm copying this by hand):
10.0.1.1
119.56.34.1
172.20.8.222
172.31.253.11
202.65.245.1
202.65.245.142
209.85.243.156
72.14.233.145
209.85.132.82
From the MBP, I can't traceroute to any of the IPs from 172.20.8.222 onwards.
[For extra flavour, not being able to access the above appears to stop me logging in to Server Fault via OpenID and formatting the above traceroutes correctly. Anyone with sufficient rep here to do so, I'd be much obliged.]
