Comments (6)
netcons
commented on July 4, 2024
Seems you can remove a single entry with:
echo "-drop_domain_blacklist:RISK_DOMAIN_domain.com" > /proc/net/xt_ndpi/host_proto
Interestingly when running the command with "-" prefix repeatedly, it will add and remove the entry:
echo "-drop_domain_blacklist:RISK_DOMAIN_domain.com" > /proc/net/xt_ndpi/host_proto
cat /proc/net/xt_ndpi/host_proto | grep "drop_domain_blacklist:RISK_DOMAIN_domain.com"
drop_domain_blacklist:RISK_DOMAIN_domain.com
echo "-drop_domain_blacklist:RISK_DOMAIN_domain.com" > /proc/net/xt_ndpi/host_proto
cat /proc/net/xt_ndpi/host_proto | grep "drop_domain_blacklist:RISK_DOMAIN_domain.com"
echo "-drop_domain_blacklist:RISK_DOMAIN_domain.com" > /proc/net/xt_ndpi/host_proto
cat /proc/net/xt_ndpi/host_proto | grep "drop_domain_blacklist:RISK_DOMAIN_domain.com"
drop_domain_blacklist:RISK_DOMAIN_domain.com
Is there a way to remove multiple entries with a single command?
echo "reset" > /proc/net/xt_ndpi/host_proto, seems to reset all not just custom host_proto.
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vel21ripn
commented on July 4, 2024
See 3deea54
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netcons
commented on July 4, 2024
Thank you.
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netcons
commented on July 4, 2024
On further investigation the following doesn't actually cause all domains to match:
echo "add_custom drop_domain_blacklist" > /proc/net/xt_ndpi/proto
echo "drop_domain_blacklist:RISK_DOMAIN_test.com" > /proc/net/xt_ndpi/host_proto
iptables -I FORWARD -m ndpi --all --risk 27 -j DROP
It causes all defined in /proc/net/xt_ndpi/host_proto to match:
cat /proc/net/xt_ndpi/host_proto | grep -w .google.
Google:.google.,.gstatic.com,gstatic.com,ggpht.com,.goog
cat /proc/net/xt_ndpi/host_proto | grep -w centos
cat /proc/net/xt_ndpi/host_proto | grep -w drop_domain_blacklist
drop_domain_blacklist:RISK_DOMAIN_test.com
host www.google.com
;; connection timed out; no servers could be reached
host www.centos.org
www.centos.org has address 52.56.83.118
host test.com
;; connection timed out; no servers could be reached
echo "reset" > /proc/net/xt_ndpi/host_proto
echo "drop_domain_blacklist:RISK_DOMAIN_test.com" > /proc/net/xt_ndpi/host_proto
cat /proc/net/xt_ndpi/host_proto | grep -w .google.
cat /proc/net/xt_ndpi/host_proto | grep -w centos
cat /proc/net/xt_ndpi/host_proto | grep -w drop_domain_blacklist
drop_domain_blacklist:RISK_DOMAIN_test.com
host www.google.com
www.google.com has address 216.58.223.132
host www.centos.org
www.centos.org has address 52.56.83.11
host test.com
;; connection timed out; no servers could be reached
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netcons
commented on July 4, 2024
Works as expected if matched directly instead of via risk:
echo "add_custom drop_domain_blacklist" > /proc/net/xt_ndpi/proto
echo "drop_domain_blacklist:test.com" > /proc/net/xt_ndpi/host_proto
iptables -I FORWARD -m ndpi --proto drop_domain_blacklist -j DROP
It causes only hosts defined in custom proto to match:
cat /proc/net/xt_ndpi/host_proto | grep -w .google.
Google:.google.,.gstatic.com,gstatic.com,ggpht.com,.goog
cat /proc/net/xt_ndpi/host_proto | grep -w centos
cat /proc/net/xt_ndpi/host_proto | grep -w drop_domain_blacklist
drop_domain_blacklist:test.com
host www.google.com
www.google.com has address 216.58.223.132
host www.centos.org
www.centos.org has address 52.56.83.118
host test.com
;; connection timed out; no servers could be reached
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netcons
commented on July 4, 2024
Additional observation is that all configured host_proto are logged with R=27 in Flowinfo log.
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