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dns server not working icmp host not reachable admin prohibited

Posted on 2011-03-08
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Last Modified: 2012-05-11
I created a test environment  using vmware workstation creating host only vm's

linux server acting as my firewall and router dual nics (one on my reg. lan and one on my host -only lan

windows 2008 server (my ad and dns server)

i have everything working up to the point of i am able to ping google and get a reply so my dns is working and when i run a tracert from my windows client it is successful in finding the google servers

then when i go to the internet browser and point to google.com i get this page can not be displayed

i ran a tcp dumpand this is the error i get

09:31:26.100581 IP 192.168.76.151 > 192.168.76.128: ICMP host 74.125.226.178 unreachable - admin prohibited, length 56

192.168.76.151 is my router /firewall (linux box) when i ping the 74.125.226.178 i get a response

i am using the microsoft root-hints as my dns source

i am a little stumped  i would appreciate any help anyone can provide

Thanks in advance
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Question by:eanda10
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dmf415 earned 500 total points
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check your iptables configuration.  This command may unblock icmp.
SERVER_IP="202.54.10.20"
iptables -A INPUT -p icmp --icmp-type 8 -s 0/0 -d $SERVER_IP -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT

iptables -A OUTPUT -p icmp --icmp-type 0 -s $SERVER_IP -d 0/0 -m state --state ESTABLISHED,RELATED -j ACCEPT
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by:eanda10
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what would the server_ip variable set to?
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Expert Comment

by:Darius Ghassem
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Well seems like you are running host only vm's which only allow traffic on the host. You need to change the network settings within the Virtual Network to be external.
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Author Comment

by:eanda10
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but isnt that the point of the router to allow the network reach the outside world in this case the LAN
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Author Closing Comment

by:eanda10
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Turns out to be an issue with some of my rules i went back to step one and flushed my firewall and rebuilt the rules and now all is good
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