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Merge pull request #2366 from GNS3/bugfix/block-iou-call
Block IOU phone home call using IPtable
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commit
19142d97bb
@ -197,10 +197,20 @@ then
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# Force hostid for IOU
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dd if=/dev/zero bs=4 count=1 of=/etc/hostid
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# Block iou call. The server is down
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# Block potential IOU phone home call (xml.cisco.com is not in use at this time)
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log "Block IOU phone home call"
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if [ "$UBUNTU_CODENAME" == "focal" ]
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then
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iptables -I OUTPUT -p udp --dport 53 -m string --hex-string "|03|xml|05|cisco|03|com" --algo bm -j DROP
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echo iptables-persistent iptables-persistent/autosave_v4 boolean true | debconf-set-selections
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echo iptables-persistent iptables-persistent/autosave_v6 boolean true | debconf-set-selections
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apt-get install -y iptables-persistent
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else
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echo "127.0.0.254 xml.cisco.com" | tee --append /etc/hosts
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fi
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fi
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log "Add gns3 to the kvm group"
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usermod -aG kvm gns3
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