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Unable to Telnet

 
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Top Forums UNIX for Dummies Questions & Answers Unable to Telnet
# 1  
Old 11-04-2008
Network Unable to Telnet
Dear All,

I have Compaq Alpha server running UNIX OS. with Old Hardware specification.

I had FTP conncetion using IP Switch ( FTP client ) to the Unix server in order to copy some files to my workstation. one day after closing the connection we noted that IT operations are not able to telnet to this server in order to do some administrative tasks

the Server administrator had a console session with the server in order to troubleshoot this isse, sample of the output is hereunder..


printing 1 hashtable with 512 buckets
Active Internet connections (including servers)
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp 0 0 192.168.2.2.1521 192.168.55.113.2974 ESTABLISHED
tcp 0 0 192.168.2.2.2522 192.168.57.42.4093 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.4292 CLOSE_WAIT
tcp 0 0 192.168.2.2.2674 192.168.57.42.4199 CLOSE_WAIT
tcp 0 0 192.168.2.2.2523 192.168.57.42.4094 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1733 CLOSE_WAIT
tcp 0 0 192.168.2.2.2524 192.168.57.42.4095 CLOSE_WAIT
tcp 0 0 192.168.2.2.1909 192.168.57.42.3945 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1742 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1744 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1751 CLOSE_WAIT
tcp 0 0 192.168.2.2.1521 192.168.2.2.1828 ESTABLISHED
tcp 0 0 192.168.2.2.1828 192.168.2.2.1521 ESTABLISHED
tcp 14 0 192.168.2.2.21 192.168.57.42.1753 CLOSE_WAIT
tcp 0 0 192.168.2.2.2694 192.168.57.42.4201 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1755 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1757 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1759 CLOSE_WAIT
tcp 0 0 192.168.2.2.2547 192.168.57.42.1796 CLOSE_WAIT
tcp 0 0 192.168.2.2.1295 192.168.2.2.1296 ESTABLISHED
tcp 0 0 192.168.2.2.1296 192.168.2.2.1295 ESTABLISHED
tcp 0 0 192.168.2.2.1297 192.168.2.2.1298 ESTABLISHED
tcp 0 0 192.168.2.2.1298 192.168.2.2.1297 ESTABLISHED
tcp 0 0 192.168.2.2.1363 192.168.57.42.1450 CLOSE_WAIT
tcp 0 0 192.168.2.2.3134 192.168.57.42.4289 CLOSE_WAIT
tcp 0 0 192.168.2.2.2924 192.168.57.42.4244 CLOSE_WAIT

0 0 192.168.2.2.1300 192.168.2.2.1301 ESTABLISHED
tcp 0 0 192.168.2.2.1301 192.168.2.2.1300 ESTABLISHED
tcp 0 0 192.168.2.2.2544 192.168.57.42.4114 CLOSE_WAIT
tcp 0 0 192.168.2.2.4757 192.168.2.2.4758 ESTABLISHED
tcp 0 0 192.168.2.2.4758 192.168.2.2.4757 ESTABLISHED
tcp 0 0 192.168.2.2.2545 192.168.57.42.4115 CLOSE_WAIT
tcp 0 0 192.168.2.2.2546 192.168.57.42.4116 CLOSE_WAIT
tcp 0 0 192.168.2.2.1303 192.168.2.2.1304 ESTABLISHED
tcp 0 0 192.168.2.2.1304 192.168.2.2.1303 ESTABLISHED
tcp 0 0 192.168.2.2.1521 192.168.2.2.1856 ESTABLISHED
tcp 0 0 192.168.2.2.1856 192.168.2.2.1521 ESTABLISHED
tcp 0 0 192.168.2.2.2548 192.168.57.42.4117 CLOSE_WAIT
tcp 0 0 192.168.2.2.2549 192.168.57.42.4118 CLOSE_WAIT
tcp 0 0 192.168.2.2.2550 192.168.57.42.4119 CLOSE_WAIT
tcp 0 0 192.168.2.2.2355 192.168.57.42.1754 CLOSE_WAIT
tcp 0 0 192.168.2.2.1606 192.168.57.42.1479 CLOSE_WAIT
tcp 0 0 192.168.2.2.1306 192.168.2.2.1307 ESTABLISHED
tcp 0 0 192.168.2.2.1307 192.168.2.2.1306 ESTABLISHED
tcp 0 0 192.168.2.2.2568 192.168.57.42.1798 CLOSE_WAIT

tcp 14 0 192.168.2.2.21 192.168.57.42.4276 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.4280 CLOSE_WAIT
tcp 0 0 192.168.2.2.1321 192.168.57.42.1445 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.4282 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1722 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.4284 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1724 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.4286 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.1726 CLOSE_WAIT
tcp 14 0 192.168.2.2.21 192.168.57.42.4288 CLOSE_WAIT
tcp 0 0 192.168.2.2.3096 192.168.57.42.4285 CLOSE_WAIT
tcp 0 0 *.8000 *.* LISTEN
tcp 0 0 *.15000 *.* LISTEN
tcp 0 0 *.7000 *.* LISTEN
tcp 0 0 *.1526 *.* LISTEN
tcp 0 0 *.9000 *.* LISTEN
tcp 0 0 *.1521 *.* LISTEN
tcp 0 0 *.4772 *.* LISTEN
tcp 0 0 *.4757 *.* LISTEN
tcp 0 0 192.168.2.2.3153 *.* LISTEN
tcp 0 0 192.168.2.2.3134 *.* LISTEN
tcp 0 0 192.168.2.2.3115 *.* LISTEN
tcp 0 0 192.168.2.2.3096 *.* LISTEN
tcp 0 0 192.168.2.2.3077 *.* LISTEN
tcp 0 0 192.168.2.2.3058 *.* LISTEN
tcp 0 0 192.168.2.2.3039 *.* LISTEN
tcp 0 0 192.168.2.2.3019 *.* LISTEN
tcp 0 0 192.168.2.2.3000 *.* LISTEN
tcp 0 0 192.168.2.2.2981 *.* LISTEN
tcp 0 0 192.168.2.2.2962 *.* LISTEN
tcp 0 0 192.168.2.2.2943 *.* LISTEN
tcp 0 0 192.168.2.2.2924 *.* LISTEN
tcp 0 0 192.168.2.2.2904 *.* LISTEN
tcp 0 0 192.168.2.2.2885 *.* LISTEN
tcp 0 0 192.168.2.2.2866 *.* LISTEN
tcp 0 0 192.168.2.2.2847 *.* LISTEN
tcp 0 0 192.168.2.2.2828 *.* LISTEN
tcp 0 0 192.168.2.2.2809 *.* LISTEN
tcp 0 0 192.168.2.2.2790 *.* LISTEN
tcp 0 0 192.168.2.2.2770 *.* LISTEN
tcp 0 0 192.168.2.2.2751 *.* LISTEN
tcp 0 0 192.168.2.2.2732 *.* LISTEN
tcp 0 0 192.168.2.2.2713 *.* LISTEN
tcp 0 0 192.168.2.2.2694 *.* LISTEN
tcp 0 0 192.168.2.2.2674 *.* LISTEN
tcp 0 0 192.168.2.2.2655 *.* LISTEN
tcp 0 0 192.168.2.2.2635 *.* LISTEN
tcp 0 0 192.168.2.2.2628 *.* LISTEN
tcp 0 0 192.168.2.2.2627 *.* LISTEN
tcp 0 0 192.168.2.2.2626 *.* LISTEN
tcp 0 0 192.168.2.2.2625 *.* LISTEN
tcp 0 0 192.168.2.2.2624 *.* LISTEN
tcp 0 0 192.168.2.2.2623 *.* LISTEN
tcp 0 0 192.168.2.2.2622 *.* LISTEN
tcp 0 0 192.168.2.2.2621 *.* LISTEN
tcp 0 0 192.168.2.2.2620 *.* LISTEN
tcp 0 0 192.168.2.2.2619 *.* LISTEN
tcp 0 0 192.168.2.2.2618 *.* LISTEN
tcp 0 0 192.168.2.2.2617 *.* LISTEN
tcp 0 0 192.168.2.2.2616 *.* LISTEN
tcp 0 0 192.168.2.2.2615 *.* LISTEN
tcp 0 0 192.168.2.2.2614 *.* LISTEN
tcp 0 0 192.168.2.2.2613 *.* LISTEN
tcp 0 0 192.168.2.2.2612 *.* LISTEN
tcp 0 0 192.168.2.2.2611 *.* LISTEN
tcp 0 0 192.168.2.2.2610 *.* LISTEN
tcp 0 0 192.168.2.2.2609 *.* LISTEN
tcp 0 0 192.168.2.2.2608 *.* LISTEN
tcp 0 0 192.168.2.2.2607 *.* LISTEN
tcp 0 0 192.168.2.2.2606 *.* LISTEN
tcp 0 0 192.168.2.2.2605 *.* LISTEN
tcp 0 0 192.168.2.2.2604 *.* LISTEN
tcp 0 0 192.168.2.2.2603 *.* LISTEN
tcp 0 0 192.168.2.2.2602 *.* LISTEN
tcp 0 0 192.168.2.2.2601 *.* LISTEN
tcp 0 0 192.168.2.2.2599 *.* LISTEN
tcp 0 0 192.168.2.2.2597 *.* LISTEN
tcp 0 0 192.168.2.2.2596 *.* LISTEN
tcp 0 0 192.168.2.2.2595 *.* LISTEN
tcp 0 0 192.168.2.2.2594 *.* LISTEN
tcp 0 0 192.168.2.2.2593 *.* LISTEN
tcp 0 0 192.168.2.2.2592 *.* LISTEN
tcp 0 0 192.168.2.2.2590 *.* LISTEN
tcp 0 0 192.168.2.2.2587 *.* LISTEN
tcp 0 0 192.168.2.2.2586 *.* LISTEN
tcp 0 0 192.168.2.2.2585 *.* LISTEN
tcp 0 0 192.168.2.2.2584 *.* LISTEN
tcp 0 0 192.168.2.2.2583 *.* LISTEN
tcp 0 0 192.168.2.2.2582 *.* LISTEN
tcp 0 0 192.168.2.2.2581 *.* LISTEN
tcp 0 0 192.168.2.2.2580 *.* LISTEN
tcp 0 0 192.168.2.2.2579 *.* LISTEN
tcp 0 0 192.168.2.2.2578 *.* LISTEN
tcp 0 0 192.168.2.2.2577 *.* LISTEN
tcp 0 0 192.168.2.2.2576 *.* LISTEN
tcp 0 0 192.168.2.2.2575 *.* LISTEN
tcp 0 0 192.168.2.2.2574 *.* LISTEN
tcp 0 0 192.168.2.2.2573 *.* LISTEN
tcp 0 0 192.168.2.2.2572 *.* LISTEN
tcp 0 0 192.168.2.2.2571 *.* LISTEN
tcp 0 0 192.168.2.2.2570 *.* LISTEN
tcp 0 0 192.168.2.2.2569 *.* LISTEN
tcp 0 0 192.168.2.2.2567 *.* LISTEN
tcp 0 0 192.168.2.2.2566 *.* LISTEN
tcp 0 0 192.168.2.2.2565 *.* LISTEN
tcp 0 0 192.168.2.2.2564 *.* LISTEN
tcp 0 0 192.168.2.2.2563 *.* LISTEN
tcp 0 0 192.168.2.2.2562 *.* LISTEN
tcp 0 0 192.168.2.2.2561 *.* LISTEN
tcp 0 0 192.168.2.2.2560 *.* LISTEN
tcp 0 0 192.168.2.2.2559 *.* LISTEN
tcp 0 0 192.168.2.2.2558 *.* LISTEN
tcp 0 0 192.168.2.2.2557 *.* LISTEN
tcp 0 0 192.168.2.2.2556 *.* LISTEN
tcp 0 0 192.168.2.2.2555 *.* LISTEN
tcp 0 0 192.168.2.2.2554 *.* LISTEN
tcp 0 0 192.168.2.2.2553 *.* LISTEN
tcp 0 0 192.168.2.2.2552 *.* LISTEN
tcp 0 0 192.168.2.2.2551 *.* LISTEN
tcp 0 0 192.168.2.2.2550 *.* LISTEN
tcp 0 0 192.168.2.2.2549 *.* LISTEN
tcp 0 0 192.168.2.2.2548 *.* LISTEN
tcp 0 0 192.168.2.2.2546 *.* LISTEN
tcp 0 0 192.168.2.2.2545 *.* LISTEN
tcp 0 0 192.168.2.2.2544 *.* LISTEN
tcp 0 0 192.168.2.2.2543 *.* LISTEN
tcp 0 0 192.168.2.2.2542 *.* LISTEN
tcp 0 0 192.168.2.2.2541 *.* LISTEN
tcp 0 0 192.168.2.2.2540 *.* LISTEN
tcp 0 0 192.168.2.2.2539 *.* LISTEN
tcp 0 0 192.168.2.2.2538 *.* LISTEN
tcp 0 0 192.168.2.2.2537 *.* LISTEN
tcp 0 0 192.168.2.2.2536 *.* LISTEN
tcp 0 0 192.168.2.2.2535 *.* LISTEN
tcp 0 0 192.168.2.2.2534 *.* LISTEN
tcp 0 0 192.168.2.2.2533 *.* LISTEN
tcp 0 0 192.168.2.2.2532 *.* LISTEN
tcp 0 0 192.168.2.2.2531 *.* LISTEN
tcp 0 0 192.168.2.2.2530 *.* LISTEN
tcp 0 0 192.168.2.2.2529 *.* LISTEN
tcp 0 0 192.168.2.2.2528 *.* LISTEN
tcp 0 0 192.168.2.2.2527 *.* LISTEN
tcp 0 0 192.168.2.2.2526 *.* LISTEN
tcp 0 0 192.168.2.2.2524 *.* LISTEN
tcp 0 0 192.168.2.2.2523 *.* LISTEN
tcp 0 0 192.168.2.2.2522 *.* LISTEN
tcp 0 0 192.168.2.2.2308 *.* LISTEN
tcp 0 0 192.168.2.2.2286 *.* LISTEN
tcp 0 0 192.168.2.2.2279 *.* LISTEN
tcp 0 0 192.168.2.2.2278 *.* LISTEN
tcp 0 0 192.168.2.2.2258 *.* LISTEN
tcp 0 0 192.168.2.2.2238 *.* LISTEN
tcp 0 0 192.168.2.2.2218 *.* LISTEN
tcp 0 0 192.168.2.2.2197 *.* LISTEN
tcp 0 0 192.168.2.2.2177 *.* LISTEN
tcp 0 0 192.168.2.2.2157 *.* LISTEN
tcp 0 0 192.168.2.2.2137 *.* LISTEN
tcp 0 0 192.168.2.2.2117 *.* LISTEN
tcp 0 0 192.168.2.2.2097 *.* LISTEN
tcp 0 0 192.168.2.2.2076 *.* LISTEN
tcp 0 0 192.168.2.2.2069 *.* LISTEN
tcp 0 0 192.168.2.2.2068 *.* LISTEN
tcp 0 0 192.168.2.2.2048 *.* LISTEN
tcp 0 0 192.168.2.2.2028 *.* LISTEN
tcp 0 0 192.168.2.2.1909 *.* LISTEN
tcp 0 0 192.168.2.2.1832 *.* LISTEN
tcp 0 0 192.168.2.2.1794 *.* LISTEN
tcp 0 0 192.168.2.2.1774 *.* LISTEN
tcp 0 0 192.168.2.2.1755 *.* LISTEN
tcp 0 0 192.168.2.2.1736 *.* LISTEN
tcp 0 0 192.168.2.2.2589 *.* LISTEN
tcp 0 0 192.168.2.2.2568 *.* LISTEN
tcp 0 0 192.168.2.2.2547 *.* LISTEN
tcp 0 0 192.168.2.2.2525 *.* LISTEN
tcp 0 0 192.168.2.2.2503 *.* LISTEN
tcp 0 0 192.168.2.2.2482 *.* LISTEN
tcp 0 0 192.168.2.2.2461 *.* LISTEN
tcp 0 0 192.168.2.2.2440 *.* LISTEN
tcp 0 0 192.168.2.2.2419 *.* LISTEN
tcp 0 0 192.168.2.2.2398 *.* LISTEN
tcp 0 0 192.168.2.2.2376 *.* LISTEN
tcp 0 0 192.168.2.2.2355 *.* LISTEN
tcp 0 0 192.168.2.2.2334 *.* LISTEN
tcp 0 0 192.168.2.2.2313 *.* LISTEN
tcp 0 0 192.168.2.2.2291 *.* LISTEN
tcp 0 0 192.168.2.2.2269 *.* LISTEN
tcp 0 0 192.168.2.2.2227 *.* LISTEN
tcp 0 0 192.168.2.2.2206 *.* LISTEN
tcp 0 0 192.168.2.2.2185 *.* LISTEN
tcp 0 0 192.168.2.2.2163 *.* LISTEN
tcp 0 0 192.168.2.2.1630 *.* LISTEN
tcp 0 0 192.168.2.2.1606 *.* LISTEN
tcp 0 0 192.168.2.2.1585 *.* LISTEN
tcp 0 0 192.168.2.2.1564 *.* LISTEN
tcp 0 0 192.168.2.2.1543 *.* LISTEN
tcp 0 0 192.168.2.2.1519 *.* LISTEN
tcp 0 0 192.168.2.2.1456 *.* LISTEN
tcp 0 0 192.168.2.2.1449 *.* LISTEN
tcp 0 0 192.168.2.2.1448 *.* LISTEN
tcp 0 0 192.168.2.2.1427 *.* LISTEN
tcp 0 0 192.168.2.2.1406 *.* LISTEN
tcp 0 0 192.168.2.2.1384 *.* LISTEN
tcp 0 0 192.168.2.2.1363 *.* LISTEN
tcp 0 0 192.168.2.2.1321 *.* LISTEN
tcp 0 0 192.168.2.2.1289 *.* LISTEN
tcp 0 0 192.168.2.2.1268 *.* LISTEN
tcp 0 0 192.168.2.2.1247 *.* LISTEN
tcp 0 0 *.914 *.* LISTEN
tcp 0 0 *.2511 *.* LISTEN
tcp 0 0 *.13722 *.* LISTEN
tcp 0 0 *.13783 *.* LISTEN
tcp 0 0 *.13724 *.* LISTEN
tcp 0 0 *.13782 *.* LISTEN
tcp 0 0 *.1306 *.* LISTEN
tcp 0 0 *.1303 *.* LISTEN
tcp 0 0 *.1300 *.* LISTEN
tcp 0 0 *.1297 *.* LISTEN
tcp 0 0 *.1295 *.* LISTEN
tcp 0 0 *.1294 *.* LISTEN
tcp 0 0 *.6000 *.* LISTEN
tcp 0 0 *.1028 *.* LISTEN
tcp 0 0 *.515 *.* LISTEN
tcp 0 0 *.1027 *.* LISTEN
tcp 0 0 *.6112 *.* LISTEN
tcp 0 0 *.10402 *.* LISTEN
tcp 0 0 *.10401 *.* LISTEN
tcp 0 0 *.79 *.* LISTEN
tcp 0 0 *.513 *.* LISTEN
tcp 0 0 *.514 *.* LISTEN
tcp 0 0 *.23 *.* LISTEN
tcp 0 0 *.21 *.* LISTEN
tcp 0 0 *.30000 *.* LISTEN
tcp 0 0 *.2301 *.* LISTEN
tcp 0 0 *.25 *.* LISTEN
tcp 0 0 *.111 *.* LISTEN
udp 0 0 192.168.2.2.1333 *.*
udp 0 0 *.1332 *.*
udp 0 0 *.1331 *.*
udp 0 0 *.9020 *.*
udp 0 0 *.9010 *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.1278 *.*
udp 0 0 *.1277 *.*
udp 0 0 192.168.2.2.2301 *.*
udp 0 0 *.177 *.*
udp 0 0 *.* *.*
udp 0 0 *.37 *.*
udp 0 0 *.518 *.*
udp 0 0 *.512 *.*
udp 224 0 *.1027 *.*
udp 0 0 *.1163 *.*
udp 0 0 *.2301 *.*
udp 0 0 *.* *.*
udp 0 0 *.* *.*
udp 0 0 *.161 *.*
udp 0 0 *.111 *.*
udp 0 0 *.1025 *.*
udp 0 0 *.* *.*
udp 0 0 *.514 *.*
===========================
Server:oraprod> telnet 192.168.2.2
Trying 192.168.2.2...
Connected to 192.168.2.2.
Escape character is '^]'.
telnetd: All network ports in use.
Connection closed by foreign host.


Server:oraprod>


# cd /usr/users/user01
# script test
Out of pty's
Terminated
#
# netstat -an |grep "192.168.57.42" |wc -l
275
# netstat -an |grep -i clos |wc -l
275
#




I need to know the root cause of this error message , and is it directly related to the FTP connection?. i have gone through many forums and i note that this error message is due to the number of pty lines. in addtion FTP (21) has nothing to do with ( telnet 23) !

your responses are highly appreciated.
Last edited by Perderabo; 11-04-2008 at 10:50 AM.. Reason: disable smilies for readability
# 2  
Old 11-04-2008
Could be You have a hog opening connections and not closing them properly (and so each connection consumes a new port...)
# 3  
Old 11-04-2008
Quote:
Originally Posted by vbe
Could be You have a hog opening connections and not closing them properly (and so each connection consumes a new port...)

What about the error message ( out of pty) highlighted in red, i think it means number of virtual telenet lines are already taken,however FTP never uses telenet port. moreover you can see in the log that the server is listning to port 23 and zero connection is established on this port !!

you think the log is incomplete ?or there could be other telnet sessions established but not showing in the log ?

any views ?
# 4  
Old 11-04-2008
There are no telnet sessions in your "netstat -a" .

Is "inetd" still running ?
Is "telnetd" still in "inetd.conf".
Are there any "telnetd" processes in memory?
# 5  
Old 11-04-2008
After I telnet somewhere I can do this:

$ tty
/dev/pts/4
$


/dev/pts/4 is a pty (pseudo-terminal) and telnetd must allocate one for a connection and the script program uses them too. You are out mostly due to 192.168.57.42 not properly closing connections. CLOSE_WAIT means a process on your end has closed a socket and now you waiting for a close from the other end. The other end is probably a PC that just reboots or powers off rather than closing a connection. You can probably tune your kernel to time-out the CLOSE_WAIT's but I don't know the specific for your kernel.
# 6  
Old 11-05-2008
Quote:
Originally Posted by Perderabo
After I telnet somewhere I can do this:

$ tty
/dev/pts/4
$


/dev/pts/4 is a pty (pseudo-terminal) and telnetd must allocate one for a connection and the script program uses them too. You are out mostly due to 192.168.57.42 not properly closing connections. CLOSE_WAIT means a process on your end has closed a socket and now you waiting for a close from the other end. The other end is probably a PC that just reboots or powers off rather than closing a connection. You can probably tune your kernel to time-out the CLOSE_WAIT's but I don't know the specific for your kernel.


First of all , i am not a Unix expert. the logs posted here was sent to me from the Unix admin.

all i wana know is there any direct proof ( assurance ) that the Passive FTP connection coming from the x.x.57.42 is the reason for not accepting the Telent session.s or there might be other scenarios such as:

there wasother telenet sessions already established, however the netstat log was manuiplated before sending it, hence it is not showing here.

or -

There was any configuration change on unix kernal ( e.g chaning the number of acceptable telenet sessions temporerally, hence no tty lines will be available ) that is why the message shows that no lines available

if you can help me out in this i would really appreciate. i am investigating this issue very seriouslly , and i wana have clear evidence for this .
Appreciating
# 7  
Old 11-05-2008
Please clarify whether there was a kernel change or not?

"There was any configuration change on unix kernal ( e.g chaning the number of acceptable telenet sessions temporerally, hence no tty lines will be available ) that is why the message shows that no lines available "
 
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