SNBForum / Merlin
HELP: Need to mirror WAN traffic going to local LAN port (Synology connected to RT-N66U) to another local LAN port (Mac running Wireshark).
I think I can do this with iptables. Can someone help with the iptables command?
Synology is at 192.168.1.100
Mac running wireshark is at 192.168.1.200
Asus is at 192.168.1.1
The command I see on the internet is
iptables -t mangle -A POSTROUTING -d 192.168.1.100 -j ROUTE --tee --gw 192.168.1.200
iptables -t mangle -A PREROUTING -s 192.168.1.100 -j ROUTE --tee --gw 192.168.1.200
but I don’t see “—tee or —gw” listed in the help section for iptables v1.3.8
WHY: I have a Synology on my local LAN. It is backing up to another Synology at a remote site. I’d like to verify that the traffic is encrypted.
MORE DETAILS: Running iptables v1.3.8
ASUSWRT-Merlin RT-N66U_3.0.0.4 Sun Mar 20 19:51:30 UTC 2016
admin@RT-N66U-9790:/tmp/home/root# iptables -h
iptables v1.3.8
Usage: iptables -[AD] chain rule-specification [options]
iptables -[RI] chain rulenum rule-specification [options]
iptables -D chain rulenum [options]
iptables -[LFZ] [chain] [options]
iptables -[NX] chain
iptables -E old-chain-name new-chain-name
iptables -P chain target [options]
iptables -h (print this help information)
Commands:
Either long or short options are allowed.
--append -A chain Append to chain
--delete -D chain Delete matching rule from chain
--delete -D chain rulenum
Delete rule rulenum (1 = first) from chain
--insert -I chain [rulenum]
Insert in chain as rulenum (default 1=first)
--replace -R chain rulenum
Replace rule rulenum (1 = first) in chain
--list -L [chain] List the rules in a chain or all chains
--flush -F [chain] Delete all rules in chain or all chains
--zero -Z [chain] Zero counters in chain or all chains
--new -N chain Create a new user-defined chain
--delete-chain
-X [chain] Delete a user-defined chain
--policy -P chain target
Change policy on chain to target
--rename-chain
-E old-chain new-chain
Change chain name, (moving any references)
Options:
--proto -p [!] proto protocol: by number or name, eg. `tcp'
--source -s [!] address[/mask]
source specification
--destination -d [!] address[/mask]
destination specification
--in-interface -i [!] input name[+]
network interface name ([+] for wildcard)
--jump -j target
target for rule (may load target extension)
--goto -g chain
jump to chain with no return
--match -m match
extended match (may load extension)
--numeric -n numeric output of addresses and ports
--out-interface -o [!] output name[+]
network interface name ([+] for wildcard)
--table -t table table to manipulate (default: `filter')
--verbose -v verbose mode
--line-numbers print line numbers when listing
--exact -x expand numbers (display exact values)
[!] --fragment -f match second or further fragments only
--modprobe=<command> try to insert modules using this command
--set-counters PKTS BYTES set the counter during insert/append
[!] --version -V print package version.
HELP: Need to mirror WAN traffic going to local LAN port (Synology connected to RT-N66U) to another local LAN port (Mac running Wireshark).
I think I can do this with iptables. Can someone help with the iptables command?
Synology is at 192.168.1.100
Mac running wireshark is at 192.168.1.200
Asus is at 192.168.1.1
The command I see on the internet is
iptables -t mangle -A POSTROUTING -d 192.168.1.100 -j ROUTE --tee --gw 192.168.1.200
iptables -t mangle -A PREROUTING -s 192.168.1.100 -j ROUTE --tee --gw 192.168.1.200
but I don’t see “—tee or —gw” listed in the help section for iptables v1.3.8
WHY: I have a Synology on my local LAN. It is backing up to another Synology at a remote site. I’d like to verify that the traffic is encrypted.
MORE DETAILS: Running iptables v1.3.8
ASUSWRT-Merlin RT-N66U_3.0.0.4 Sun Mar 20 19:51:30 UTC 2016
admin@RT-N66U-9790:/tmp/home/root# iptables -h
iptables v1.3.8
Usage: iptables -[AD] chain rule-specification [options]
iptables -[RI] chain rulenum rule-specification [options]
iptables -D chain rulenum [options]
iptables -[LFZ] [chain] [options]
iptables -[NX] chain
iptables -E old-chain-name new-chain-name
iptables -P chain target [options]
iptables -h (print this help information)
Commands:
Either long or short options are allowed.
--append -A chain Append to chain
--delete -D chain Delete matching rule from chain
--delete -D chain rulenum
Delete rule rulenum (1 = first) from chain
--insert -I chain [rulenum]
Insert in chain as rulenum (default 1=first)
--replace -R chain rulenum
Replace rule rulenum (1 = first) in chain
--list -L [chain] List the rules in a chain or all chains
--flush -F [chain] Delete all rules in chain or all chains
--zero -Z [chain] Zero counters in chain or all chains
--new -N chain Create a new user-defined chain
--delete-chain
-X [chain] Delete a user-defined chain
--policy -P chain target
Change policy on chain to target
--rename-chain
-E old-chain new-chain
Change chain name, (moving any references)
Options:
--proto -p [!] proto protocol: by number or name, eg. `tcp'
--source -s [!] address[/mask]
source specification
--destination -d [!] address[/mask]
destination specification
--in-interface -i [!] input name[+]
network interface name ([+] for wildcard)
--jump -j target
target for rule (may load target extension)
--goto -g chain
jump to chain with no return
--match -m match
extended match (may load extension)
--numeric -n numeric output of addresses and ports
--out-interface -o [!] output name[+]
network interface name ([+] for wildcard)
--table -t table table to manipulate (default: `filter')
--verbose -v verbose mode
--line-numbers print line numbers when listing
--exact -x expand numbers (display exact values)
[!] --fragment -f match second or further fragments only
--modprobe=<command> try to insert modules using this command
--set-counters PKTS BYTES set the counter during insert/append
[!] --version -V print package version.
