trying to ping with mac os x terminal and not working

#Trying to ping with mac os x terminal and not working pdf
#Trying to ping with mac os x terminal and not working code
#Trying to ping with mac os x terminal and not working series

Should that cause Firefox to behaveĭifferently? If it is IPv6, why did I first see it with Leopard? Uses 'Pragma: no-cache' in its response headers, but doesn't kb/Firefox+cannot+load+web+sites+but+other+programs+canįirefox cannot load web sites but other programs canīut why Google and not other sites? I do notice that Google Itself suggests that disabling IPv6 is a likely fix: 6 user set boolean trueĪnd another site includes posts from people who IPv6 support in Firefox causes slow lookups Person solved it by implementing a local caching DNS. Reports very similar behaviour, and interestingly enough that Similar symptoms, and it turns out that yes, they have: this newsgroup post My next thought was to see if anyone else had ever observed and I also notice that there is mention of a network.dnsCacheExpiration key that can be set - though I don't see that in my 'about:config'. Their DNS strategy that might help figure this out. Safari apparently does, and that fills the cache, Is not in the resolver cache and Firefox is not asking it to So, my theory so far is this: after sleeping, sometimes

#Trying to ping with mac os x terminal and not working pdf

If you are totally confused by DNS, I recommend Take Control of Your Domain Names, a $10.00 PDF E-Book that demystifies all of this. Safari gets an answer but Firefox doesn't. Yet it would seem to be something like that, because If it is resolver code, the next question is what is FirefoxĪsking that Safari is not? It could be something like aĭNS issue, but '' etc. Will or will not fix it - it may be days before it happens again. Therefore I don't get a lot of chances to see what actions I can'tĮasily reproduce the symptoms: it doesn't happen every time the Mac Started after upgrading to Leopard, but it does seem odd that resettingīut the 'fix' is just black magic at this point.

#Trying to ping with mac os x terminal and not working code

Obviously the resolver code is more suspicious as the problems Issue - either my Verizon router or the Leopard resolver code. so my thinking is that this has to be a local When I go back to FirefoxĪnd click 'Try again' or just click the bue Reload button, Firefox Whenįirefox refuses to find Google, all I have to do is switch over Here's where we move into 'this makes no sense!' land. Of course I can't say that absolutely, because there could be otherĭomains thar will not resolve, but so far I haven't noticed any: Realize that while Firefox is unable to find any site (gmail,Īdsense, analytics, whatever), any other browsing seems to be fine.

This would happen after waking from sleep, so I blamed Verizon or my router, because rebooting The first few times this happened I thought it was justĬoincidence - maybe Google was down or more reasonably some The symptoms are simple enough: Firefox suddenly cannot resolveĪny address after OS X awakes from a nap. Mac OS X Leopard, and I'm not even sure where to start debugging this. I have been experiencing some intermittent and very strange problems 12:26:36 64 bytes from 172.217.4.46: icmp_seq=4 ttl=55 time=20.Update (see comments for details): dscacheutil -flushcache at a terminal window fixes this for me. If the file doesn't yet exist, a new file will be made, else the results will be appended to the file without overwriting the existing contents. Redirect the output of echo from standard output to the end of the file PingsWithDate.txt in the user folder.

$pongĪlso print the output from the ping command stored in the variable pong. Print the current date, without trying to set it (-j), in the format of year-month-date hour:minute:second. echo ''Ĭopy the following to the standard output. Go to the command after 'done' if there is no more output. If there is any output from the pipe, set the variable pong to the output and do the following commands up to 'done', returning here to check for more output. 'Pipe' the output to the following command.

#Trying to ping with mac os x terminal and not working series

The result is the number of each ping in series (icmp_seq), the maximum amount of IP routers allowed to transmit the message, and the time taken by the round-trip. Send a periodic message to asking for a simple reply. Ping -i 2 -c 10000 | while read pong do echo '$(date -j '+%Y-%m-%d %H:%M:%S') $pong' 1>~/PingsWithDate.txt doneĮxplanation of commands in the above code ping This code, to be run in a BASH terminal command line, combines the methods, found in the references below, of adding a timestamp and saving the output to a file: Here's a command to save a record of ten thousand pings with a timestamp.