月度归档： 2021年3月

# iptables -A INPUT -s 10.0.0.1
# iptables -A OUTPUT -d 10.0.0.1
# iptables -vnL
Chain INPUT (policy ACCEPT 7967 packets, 4273K bytes)
 pkts bytes target     prot opt in     out     source               destination
16572 4535K            all  --  *      *       10.0.0.1             0.0.0.0/0
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
Chain OUTPUT (policy ACCEPT 8562 packets, 6767K bytes)
 pkts bytes target     prot opt in     out     source               destination
 2823 2974K            all  --  *      *       0.0.0.0/0            10.0.0.1

# iptables -A INPUT -p tcp --dport 12000
# iptables -A OUTPUT -p tcp --sport 12000
# iptables -vnL
Chain INPUT (policy ACCEPT 9806 packets, 5038K bytes)
 pkts bytes target     prot opt in     out     source               destination
 669K  184M            all  --  *      *       10.0.0.1             0.0.0.0/0
   50  3640            tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp dpt:12000
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
Chain OUTPUT (policy ACCEPT 10285 packets, 7196K bytes)
 pkts bytes target     prot opt in     out     source               destination
 665K  687M            all  --  *      *       0.0.0.0/0            10.0.0.1
   10  1288            tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp spt:12000

按照 iptables 的規則語法即可自由組合。需要特定時間的紀錄，用 crontab 導出 iptables -vnL 內容，iptables -D 刪除紀錄，再重新添加即可。

0 22 * * * /usr/bin/tmux new -d && /usr/bin/tmux send-keys -t 0 “vnstat -l” ENTER
0 23 * * * /usr/bin/tmux send-keys -t 0 C-c

Just for reference, please verify if the command fits your needs. Such as, if there are old tmux sessions in place, the new session number won’t be 0, you might want to specify session name with -s.