How to see total number of connections

[Tellus1]

Is there any way to check the total number of open connections on the router (such as netstat -s on a Windows PC shows you a line with "Current connections=...")?
(And I mean all the connections between WAN and the computers in LAN - not only between router services and WAN.)

[al37919]

/bin/netstat
for more advanced version:
ipkg install net-tools

[Tellus1]

netstat shows only the following

Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 localhost.localdoma:www localhost.localdom:3328 TIME_WAIT
tcp 0 0 localhost.localdoma:www localhost.localdom:3329 TIME_WAIT
tcp 0 0 localhost.localdoma:www localhost.localdom:3330 TIME_WAIT
tcp 0 0 localhost.localdoma:www localhost.localdom:3331 TIME_WAIT
tcp 0 0 localhost.localdoma:www localhost.localdom:3327 TIME_WAIT
tcp 0 536 ::ffff:192.168.8:telnet ::ffff:192.168.83.:2256 ESTABLISHED
Active UNIX domain sockets (w/o servers)
Proto RefCnt Flags Type State I-Node Path
unix 4 [ ] DGRAM 342 /dev/log
unix 2 [ ] DGRAM 167213
unix 2 [ ] DGRAM 347
unix 2 [ ] DGRAM 340
unix 2 [ ] DGRAM 338
unix 2 [ ] DGRAM 335
unix 2 [ ] DGRAM 333
unix 2 [ ] DGRAM 331
unix 2 [ ] DGRAM 329
unix 2 [ ] DGRAM 327
unix 2 [ ] DGRAM 324


Which is the number of connections?

[al37919]

ýòî? Åñëè äà, òî ÿ æå ñêàçàë net-tools

root@wl500g,~> /opt/bin/netstat -s
Ip:
    3427358 total packets received
    1746451 forwarded
    12924 incoming packets discarded
    1634576 incoming packets delivered
    1613616 requests sent out
    1162 outgoing packets dropped
    45 dropped because of missing route
    9 reassemblies required
    4 packets reassembled ok
    2 fragments received ok
    172 fragments failed
    4 fragments created
Icmp:
    12924 ICMP messages received
    77 input ICMP message failed.
    ICMP input histogram:
        destination unreachable: 10374
        timeout in transit: 3
        echo requests: 106
        echo replies: 2441
    30060 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
        destination unreachable: 28792
        redirect: 1162
        echo replies: 106
Tcp:
    20210 active connections openings
    20082 passive connection openings
    56 failed connection attempts
    0 connection resets received
    4 connections established
    1512342 segments received
    1479135 segments send out
    24917 segments retransmited
    0 bad segments received.
    95 resets sent
Udp:
    92293 packets received
    12390 packets to unknown port received.
    0 packet receive errors
    92184 packets sent
TcpExt:
    70 resets received for embryonic SYN_RECV sockets
    217 packets pruned from receive queue because of socket buffer overrun
    ArpFilter: 0
    19644 TCP sockets finished time wait in fast timer
    8266 delayed acks sent
    813 delayed acks further delayed because of locked socket
    Quick ack mode was activated 349 times
    1719 times the listen queue of a socket overflowed
    1719 SYNs to LISTEN sockets ignored
    26814 packets directly queued to recvmsg prequeue.
    300023746 packets directly received from backlog
    38420916 packets directly received from prequeue
    419663 packets header predicted
    241112 packets header predicted and directly queued to user
    TCPPureAcks: 171668
    TCPHPAcks: 607724
    TCPRenoRecovery: 0
    TCPSackRecovery: 9857
    TCPSACKReneging: 0
    TCPFACKReorder: 3
    TCPSACKReorder: 29
    TCPRenoReorder: 0
    TCPTSReorder: 0
    TCPFullUndo: 1
    TCPPartialUndo: 17
    TCPDSACKUndo: 0
    TCPLossUndo: 70
    TCPLoss: 7603
    TCPLostRetransmit: 5
    TCPRenoFailures: 0
    TCPSackFailures: 1853
    TCPLossFailures: 497
    TCPFastRetrans: 13305
    TCPForwardRetrans: 259
    TCPSlowStartRetrans: 3358
    TCPTimeouts: 1262
    TCPRenoRecoveryFail: 0
    TCPSackRecoveryFail: 2324
    TCPSchedulerFailed: 11
    TCPRcvCollapsed: 3660
    TCPDSACKOldSent: 415
    TCPDSACKOfoSent: 0
    TCPDSACKRecv: 0
    TCPDSACKOfoRecv: 0
    TCPAbortOnSyn: 0
    TCPAbortOnData: 15
    TCPAbortOnClose: 167
    TCPAbortOnMemory: 0
    TCPAbortOnTimeout: 55
    TCPAbortOnLinger: 0
    TCPAbortFailed: 0
    TCPMemoryPressures: 0 

[Tellus1]

Well, I've created an alias that contains:

sed -n '"'"'s%.* src=\(192.168.[0-9.]*\).*%\1%p'"'"' /proc/net/ip_conntrack | sort | uniq -c

It shows me the number of open connections on each host.