503 Service Unavailable – What really it means


I developed a website and it loads in every other system but certainly not in mine … WHen i used firebug my request show 503 Service Unavailable


My response was,

Server squid/2.6.STABLE21
Date Sat, 27 Mar 2010 12:25:18 GMT
Content-Type text/html
Content-Length 1163
Expires Sat, 27 Mar 2010 12:25:18 GMT
X-Squid-Error ERR_DNS_FAIL 0
X-Cache MISS from xavy
X-Cache-Lookup MISS from xavy:3128
Via 1.0 xavy:3128 (squid/2.6.STABLE21)
Proxy-Connection close

Best Answer

Perhaps you have weird proxy settings. 503 usually signifies a temporary outage and has more possible causes than you can poke a stick at.

If it's just your machine that's failing, then maybe something is misconfigured in your browser, or your browser is the only one pointing to a misconfigured proxy. The squid warnings are a tell-tale. Are you running the browser on the same box as the proxy? That often causes problems due to squid's default ACLs.

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