On Sunday 08 April 2007 14:09, [EMAIL PROTECTED] wrote:
> On Sun, 8 Apr 2007, Hans wrote:
> > Hi,
> >
> > Last week I switched to another ADSL-provider (cheaper, faster,
> > better(?)). With the new connection I got another modem. The modem (ST
> > WL780i) allows only 1024 concurrent connections. NTP-pool delivers me
> > much more.
>
> Are you sure you are reaching the limit ??
I did that once, I try to prevent running into it again, it jeopardises my
internet connection completely.
>
> I would find 1024 quite low anyway, linux conntracking supports 65536 at
> least.
I agree completely, the modem design is not mine.
>
> Anyway I never get more than 512 conntrack entries for UDP 123. (NTP)
>
> You have to remember UDP is connection less anyway.
I'm not a network guru but UDP does create sockets on which a sort of
connection can be established. E.g. reply's on SIP requests do get back to
the correct server without setting NAT, I found out yesterday.
This is (part of) what the modem says:
{Administrator}=>:connection list
ID proto state substate flags timeout
-- ----- ----- -------- ----- -------
381 tcp ACTIVE [TCPS_ESTABLISHED-TCPS_ESTABLISHED] [.........] 15' 7"
INIT: 762 10. 0. 0. 12:51418 10. 0. 0.138: 23 [....] LocalNetwork
216 tcp 0
RESP: 763 10. 0. 0.138: 23 10. 0. 0. 12:51418 [R...] loop 178
tcp 0
390 udp ACTIVE 0 [.........] 44"
INIT: 780 10. 0. 0.199: 2152 193. 93. 46. 46:16569 [....] LocalNetwork
37337 udp 0
RESP: 781 193. 93. 46. 46:16569 89.220. 77.156:55354 [R...] Internet
72977 udp 0
605 tcp ACTIVE [TCPS_ESTABLISHED-TCPS_ESTABLISHED] [.........] 15' 7"
INIT: 1210 10. 0. 0.200: 1049 207. 46.109. 50: 1863 [....] LocalNetwork
381 tcp 0
RESP: 1211 207. 46.109. 50: 1863 89.220. 77.156:55045 [R...] Internet
374 tcp 0
664 udp ACTIVE 0 [.........] 43"
INIT: 1328 66. 99. 85.250: 385 89.220. 77.156: 123 [....] Internet
363 udp 0
RESP: 1329 10. 0. 0. 12: 123 66. 99. 85.250: 385 [R...] LocalNetwork
147 udp 0
562 udp ACTIVE 0 [.........] 43"
INIT: 1124 60.231.113.109: 123 89.220. 77.156: 123 [....] Internet
364 udp 0
RESP: 1125 10. 0. 0. 12: 123 60.231.113.109: 123 [R...] LocalNetwork
148 udp 0
525 udp ACTIVE 0 [.........] 43"
INIT: 1050 10. 0. 0.199:55026 193. 93. 46. 46:55025 [....] LocalNetwork
1421 udp 0
RESP: 1051 193. 93. 46. 46:55025 89.220. 77.156:55367 [R...] Internet
0 udp 0
495 udp ACTIVE 0 [.........] 43"
INIT: 990 138.232. 65.157:37151 89.220. 77.156: 123 [....] Internet
87 udp 0
RESP: 991 10. 0. 0. 12: 123 138.232. 65.157:37151 [R...] LocalNetwork
84 udp 0
936 udp ACTIVE 0 [.........] 43"
INIT: 1872 131.109.225. 34: 277 89.220. 77.156: 123 [....] Internet
364 udp 0
RESP: 1873 10. 0. 0. 12: 123 131.109.225. 34: 277 [R...] LocalNetwork
148 udp 0
794 udp ACTIVE 0 [.........] 43"
INIT: 1588 81.175. 75. 1:63100 89.220. 77.156: 123 [....] Internet
364 udp 0
RESP: 1589 10. 0. 0. 12: 123 81.175. 75. 1:63100 [R...] LocalNetwork
148 udp 0
32 udp ACTIVE 0 [.........] 43"
INIT: 64 81. 0.176.226: 123 89.220. 77.156: 123 [....] Internet
576 udp 0
RESP: 65 10. 0. 0. 12: 123 81. 0.176.226: 123 [R...] LocalNetwork
576 udp 0
473 tcp ACTIVE [TCPS_ESTABLISHED-TCPS_ESTABLISHED] [.........] 15' 6"
INIT: 946 10. 0. 0.200: 1203 75. 57.135. 87: 8968 [....] LocalNetwork
2192 tcp 0
RESP: 947 75. 57.135. 87: 8968 89.220. 77.156:56019 [R...] Internet
2246 tcp 0
317 tcp ACTIVE [TCPS_ESTABLISHED-TCPS_ESTABLISHED] [.........] 15' 5"
INIT: 634 10. 0. 0.200: 1179 69.145.229. 13:41293 [....] LocalNetwork
2136 tcp 0
RESP: 635 69.145.229. 13:41293 89.220. 77.156:55992 [R...] Internet
2184 tcp 0
864 tcp ACTIVE [TCPS_ESTABLISHED-TCPS_ESTABLISHED] [.........] 15' 6"
INIT: 1728 10. 0. 0.200: 1439 207. 46. 27. 48: 1863 [....] LocalNetwork
24 tcp 0
RESP: 1729 207. 46. 27. 48: 1863 89.220. 77.156:56704 [R...] Internet
23 tcp 0
502 udp ACTIVE 0 [.........] 42"
INIT: 1004 24.150. 54.223:63729 89.220. 77.156: 123 [....] Internet
363 udp 0
RESP: 1005 10. 0. 0. 12: 123 24.150. 54.223:63729 [R...] LocalNetwork
147 udp 0
234 udp ACTIVE 0 [.........] 42"
INIT: 468 67.155. 45. 66:48271 89.220. 77.156: 123 [....] Internet
364 udp 0
RESP: 469 10. 0. 0. 12: 123 67.155. 45. 66:48271 [R...] LocalNetwork
147 udp 0
778 tcp ACTIVE [TCPS_ESTABLISHED-TCPS_ESTABLISHED] [.........] 15' 5"
>
> So it boils down to : Are you sure you are experiencing a problem because
> of that 1024 limit ???
More modem output:
{Administrator}=>connection stats
Connection statistics:
-------------------------------------------
Maximum number of connections : 1024
Maximum number of halfopen connections : 1024
-------------------------------------------
Number of active connections : 287
Number of halfopen connections : 9
Number of expected connections : 0
Number of loose connections : 0
Number of closing connections : 0
Number of idle connections : 99
Number of mcast connections : 0
-------------------------------------------
Number of TCP connections : 46
Number of UDP connections : 241
Number of ICMP connections : 0
Number of non TCP/UDP/ICMP connections : 0
Best regards,
Hans
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